Japan Science and Technology Agency, PRESTO

2003 - 2007

科学技術振興機構さきがけ研究（個人型）「ナノと物性」領域

2003 - 2007

Institute for Materials Research, Tohoku University   Research Associate

2002.6 - 2007.3

COMET, National Institute for Research in Inorganic Materials

2002 - 2006

物質・材料研究機構COMETプロジェクト

2002 - 2006

Bell Laboratories, Lucent Technology   Department of Materials Physics   Postdoctral Member of Technical Stuff

2000.4 - 2002.5

Lucent Technologies, Bell Laboratories

2000 - 2002

Materials Research Society

Surface Science Society of Japan

Electrochemical modulation of electronic states in strongly correlated transition-metal oxides Reviewed

Akira Ohtomo, Takuto Soma

Vol. 91 ( No. 6 )   340 - 345   2022.6

Epitaxial growth of MoO3 polymorphs and impacts of Li-ion electrochemical reactions on their structural and electronic properties Reviewed International journal

Shuxin Zhang, Tatsuya Yajima, Takuto Soma, Akira Ohtomo

Applied Physics Express   Volume 15 ( Number 5 )   055505   2022.5

Two-dimensional superconductivity in single-band correlated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mi>H</mml:mi></mml:mrow></mml:math> -type <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Nb</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> layers International journal

Takuto Soma, Kohei Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, Akira Ohtomo

Physical Review B   105 ( 10 )   2022.3

Enhancement of transparency in epitaxially-grown p-type SnO films by surface-passivation treatment in a Na2S aqueous solution Reviewed International journal

Suguri Uchida, Takuto Soma, Miho Kitamura, HIroshi Kumigashira, Akira OHTOMO

Japanese Journal of Applied Physics   61   050903   2022.2

Heavy-fermion metallic state and Mott transition induced by Li-ion intercalation in LiV2O4 epitaxial films Reviewed International journal

Tatsuya Yajima, Takuto Soma, Kohei Yoshimatsu, Nobuyuki Kurita, Masari Watanabe, Akira Ohtomo

Physical Review B   104 ( 24 )   245104   2021.12

Optical properties of LiNbO2 thin films International journal

T. Kurachi, T. Yamaguchi, E. Kobayashi, T. Soma, A. Ohtomo, T. Makino

Physica B: Condensed Matter   621   413259 - 413259   2021.11

Epitaxial Stabilization of Complete Solid-solution β-(Al<inf>x</inf>Ga<inf>1- x</inf>)<inf>2</inf>O<inf>3</inf>(100) Films by Pulsed-laser Deposition International journal

Ryo Wakabayashi, Kohei Yoshimatsu, Mai Hattori, Jung Soo Lee, Osami Sakata, Akira Ohtomo

Crystal Growth and Design   21 ( 5 )   2844 - 2849   2021.5

物質理工学院応用化学系大友研究室2020年度研究報告 層状岩塩型LiNiO2のエピタキシャル成長と電気伝導性

矢島 達也, 相馬 拓人, 大友 明

東京工業大学極低温研究支援センターだより   2021.3

Superconducting Dome Underlying Bipolaronic Insulating State in Charge-doped Ti4O7 Epitaxial Films Reviewed International journal

Takuto Soma, Tomohiro Kobayashi, Kohei Yoshimatsu, Akira Ohtomo

Journal of the Physical Society of Japan   Vol. 90 ( No. 2 )   023705 - 023705   2021.1

Epitaxial Thin Film Growth of Europium Dihydride Reviewed International journal

Yuya Komatsu, Ryota Shimizu, Markus Wilde, Shigeru Kobayashi, Yuki Sasahara, Kazunori Nishio, Kei Shigematsu, Akira Ohtomo, Katsuyuki Fukutani, Taro Hitosugi

Crystal Growth and Design   20 ( 9 )   5903 - 5907   2020.9

p-type transparent superconductivity in a layered oxide Reviewed International journal

Takuto Soma, Kohei Yoshimatsu, Akira Ohtomo

Science Advances   6 ( 29 )   eabb8570 - eabb8570   2020.7

Optical and structural investigations on titanium oxynitride films for visible-UV photocatalytic applications International journal

Jun Mizushiro, Kohei Yoshimatsu, Naoki Ohashi, Masahiko Tanaka, Osami Sakata, Akira Ohtomo

JOURNAL OF APPLIED PHYSICS   127 ( 13 )   6   2020.4

物質理工学院応用化学系大友研究室2019年度研究報告 Liイオン挿入反応による重い電子系スピネル型構造LiV2O4エピタキシャル薄膜の電気伝導性変調

矢島 達也, 相馬 拓人, 大友 明

東京工業大学極低温研究支援センターだより   2020.3

Exchange bias and spin glass states driven by antisite disorder in the double perovskite compound LaSrCoFeO 6 International journal

R. C. Sahoo, Yu Takeuchi, Akira Ohtomo, Z. Hossain

Physical Review B   Vol. 100 ( Issue 21 )   9   2019.12

Magnetic and electronic properties of B -site-ordered double-perovskite oxide La2CrMnO6 thin films Reviewed International journal

K. Yoshimatsu, J. Ishimaru, K. Watarai, K. Yamamoto, Y. Hirata, H. Wadati, Y. Takeda, K. Horiba, H. Kumigashira, O. Sakata, A. Ohtomo

Physical Review B   99 ( 23 )   235129   2019.6

βパイロクロア型CsW2O6エピタキシャル薄膜における金属絶縁体転移をまたいだ電子物性 Reviewed International journal

Takuto Soma, Kohei Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, Akira Ohtomo

Physical Review Materials   Vol. 2 ( 11 )   8   2018.11

Large anisotropy in conductivity of Ti2O3 films Reviewed International journal

K. Yoshimatsu, H. Kurokawa, K. Horiba, H. Kumigashira, A. Ohtomo

APL Materials   6   101101   2018.10

Band alignment at β-(AlxGa1−x)2O3/β-Ga2O3 (100) interface fabricated by pulsed-laser deposition Reviewed International journal

Ryo Wakabayashi, Mai Hattori, Kohei Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, Akira Ohtomo

Applied Physics Letters   112 ( 23 )   2018.6

Superconductivity in Ti4O7 and gamma-Ti3O5 films Reviewed International journal

K. Yoshimatsu, O. Sakata, A. Ohtomo

SCIENTIFIC REPORTS   7   12544   2017.10

Epitaxial structure and electronic property of beta-Ga2O3 films grown on MgO (100) substrates by pulsed-laser deposition International journal

Ryo Wakabayashi, Kohei Yoshimatsu, Mai Hattori, Akira Ohtomo

APPLIED PHYSICS LETTERS   111 ( 16 )   162101   2017.10

Highly oriented epitaxial CaFe₂O₄ thin films on TiO₂ substrates grown by pulsed-laser deposition Reviewed

Nana Nishiyama, Hisanori Mashiko, K. Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, A. Ohtomo

Thin Solid Films   Vol. 638   406 - 409   2017.9

Hetero-epitaxial growth control of single-crystalline anatase TiO2 nanosheets predominantly exposing the {001} facet on oriented crystalline substrates Reviewed International journal

M. M. Maitani, K. Tanaka, H. Satou, T. Oshima, A. Ohtomo, Y. Wada

CRYSTENGCOMM   19 ( 32 )   4734 - 4741   2017.8

Effects of phase fraction on superconductivity of low-valence eutectic titanate films International journal

Hikaru Kurokawa, Kohei Yoshimatsu, Osami Sakata, Akira Ohtomo

JOURNAL OF APPLIED PHYSICS   122 ( 5 )   2017.8

Electronic Structures and Photoanodic Properties of Ilmenite-type MTiO3 Epitaxial Films (M = Mn, Fe, Co, Ni) Reviewed International journal

K. Yoshimatsu, H. Mashiko, N. Umezawa, K. Horiba, H. Kurnigashira, A. Ohtomo

JOURNAL OF PHYSICAL CHEMISTRY C   121 ( 34 )   18717 - 18724   2017.8

Microwave Effects on Co-Pi Cocatalysts Deposited on alpha-Fe2O3 for Application to Photocatalytic Oxygen Evolution Reviewed International journal

Masato M. Maitani, Takuya Yamada, Hisanori Mashiko, Kohei Yoshimatsu, Takayoshi Shim, Akira Ohtomo, Yuji Wada

ACS APPLIED MATERIALS & INTERFACES   9 ( 12 )   10349 - 10354   2017.3

Formation of indium-tin oxide ohmic contacts for beta-Ga2O3 Reviewed International journal

Oshima Takayoshi, Wakabayashi Ryo, Hattori Mai, Hashiguchi Akihiro, Kawano Naoto, Sasaki Kohei, Masui Takekazu, Kuramata Akito, Yamakoshi Shigenobu, Yoshimatsu Kohei, Ohtomo Akira, Oishi Toshiyuki, Kasu Makoto

JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 12 )   1202B7   2016.12

Epitaxial growth and electric properties of gamma-Al2O3(110) films on beta-Ga2O3(010) substrates Reviewed International journal

Hattori Mai, Oshima Takayoshi, Wakabayashi Ryo, Yoshimatsu Kohei, Sasaki Kohei, Masui Takekazu, Kuramata Akito, Yamakoshi Shigenobu, Horiba Koji, Kumigashira Hiroshi, Ohtomo Akira

JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 12 )   1202B6   2016.12

Epitaxial synthesis and physical properties of double-perovskite oxide Sr₂CoRuO₆ thin films Reviewed International journal

Keisuke Watarai, K. Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, Osami Sakata, A. Ohtomo

Journal of Physics: Condensed Matter   Vol. 28 ( No. 48 )   2016.9

Impact of built-in potential across LaFeO3/SrTiO3 heterojunctions on photocatalytic activity Reviewed International journal

Kentarou Nakamura, Hisanori Mashiko, Kohei Yoshimatsu, Akira Ohtomo

APPLIED PHYSICS LETTERS   108 ( 21 )   211605   2016.5

Strain-induced metal-insulator transition in t(2g) electron system of perovskite titanate Sm0.5Ca0.5TiO3 films Reviewed International journal

K. Yoshimatsu, H. Okabe, T. Oshima, S. Ueda, A. Ohtomo

PHYSICAL REVIEW B   93 ( 19 )   195159   2016.5

Fabrication and Characterization of Semiconductor Photoelectrodes with Orientation-Controlled α-Fe₂O₃ Thin Films Reviewed International journal

H. Mashiko, K. Yoshimatsu, T. Oshima, A. Ohtomo

The Journal of Physical Chemistry C   Vol. 120 ( No. 5 )   2747–2752   2016.1

Insulator to metal transition of WO₃ epitaxial films induced by electrochemical Li-ion intercalaion Reviewed International journal

K. Yoshimatsu, Takuto Soma, A. Ohtomo

Apllied Physics Express   9 ( 7 )   75802 - 75802   2016

Epitaxial growth of hexagonal tungsten bronze Cs_xWO₃ films in superconducting phase region exceeding bulk limit Reviewed International journal

Takuto Soma, K. Yoshimatsu, A. Ohtomo

Apllied Physics Express   9 ( 7 )   75801 - 75801   2016

Reversible superconductor-insulator transition in LiTi2O4 induced by Li-ion electrochemical reaction Reviewed International journal

K. Yoshimatsu, M. Niwa, H. Mashiko, T. Oshima, A. Ohtomo

SCIENTIFIC REPORTS   5 ( 16325 )   2015.11

Oxygen-radical-assisted pulsed-laser deposition of β-Ga₂O₃ and β-(Al_xGa_1−x)₂O₃ films Reviewed

R. Wakabayashi, T. Oshima, M. Hattori, T. Masui, A. Kuramata, S. Yamakoshi, K. Yoshimatsu, A. Ohtomo

Journal of Crystal Growth   Vol. 424   77 - 79   2015.5

Conducting Si-doped γ-Ga₂O₃ epitaxial films grown by pulsed-laser deposition Reviewed International journal

Takayoshi Oshima, Keitarou Matsuyama, Kohei Yoshimatsu, Akira Ohtomo

Journal of Crystal Growth   Volume 421   23 - 26   2015.4

Pulsed-laser deposition of superconducting LiTi₂O₄ ultrathin films Reviewed International journal

T. Oshima, M. Niwa, K. Yokoyama, A. Ohtomo

Journal of Crystal Growth   Volume 419   153 - 157   2015.3

Direct growth of metallic TiH2 thin films by pulsed laser deposition Reviewed International journal

Yoshimatsu Kohei, Suzuki Takayuki, Tsuchimine Nobuo, Horiba Koji, Kumigashira Hiroshi, Oshima Takayoshi, Ohtomo Akira

APPLIED PHYSICS EXPRESS   8 ( 3 )   35801 - 35801   2015.3

Synthesis and magnetic properties of double-perovskite oxide La2MnFeO6 thin films Reviewed International journal

K. Yoshimatsu, K. Nogami, K. Watarai, K. Horiba, H. Kumigashira, O. Sakata, T. Oshima, A. Ohtomo

PHYSICAL REVIEW B   91 ( 5 )   054421   2015.2

Epitaxial growth of wide-band-gap ZnGa₂O₄ films by mist chemical vapor deposition Reviewed International journal

T. Oshima, M. Niwa, A. Mukai, T. Nagami, T. Suyama, A. Ohtomo

Journal of Crystal Growth   Volume 386   190 - 193   2014.1

Surface and interface engineering of ZnO based heterostructures fabricated by pulsed-laser deposition International journal

A. Tsukazaki, A. Ohtomo, M. Kawasaki

Journal of Physics D: Applied Physics   Volume 47 ( Number 3 )   034003   2013.12

Improved visible light driven photoelectrochemical properties of 3C-SiC semiconductor with Pt nanoparticles for hydrogen generation Reviewed International journal

Jun Tae Song, Hisanori Mashiko, Masayuki Kamiya, Yoshifumi Nakamine, Akira Ohtomo, Takayuki Iwasaki, Mutsuko Hatano

APPLIED PHYSICS LETTERS   103 ( 21 )   213901 (5 pages)   2013.11

beta-Ga2O3 Single Crystal as a Photoelectrode for Water Splitting Reviewed International journal

Oshima Takayoshi, Kaminaga Kenichi, Mashiko Hisanori, Mukai Akira, Sasaki Kohei, Masui Takekazu, Kuramata Akito, Yamakoshi Shigenobu, Ohtomo Akira

JAPANESE JOURNAL OF APPLIED PHYSICS   52 ( 11 )   111102 - 1-4   2013.11

Epitaxial Synthesis and Electronic Properties of Double-Perovskite Sr2TiRuO6 Films Reviewed International journal

Nogami Kengo, Yoshimatsu Kohei, Mashiko Hisanori, Sakai Enju, Kumigashira Hiroshi, Sakata Osami, Oshima Takayoshi, Ohtomo Akira

APPLIED PHYSICS EXPRESS   6 ( 10 )   105502 - 1-4   2013.10

Formation of Semi-Insulating Layers on Semiconducting beta-Ga2O3 Single Crystals by Thermal Oxidation Reviewed International journal

Oshima Takayoshi, Kaminaga Kenichi, Mukai Akira, Sasaki Kohei, Masui Takekazu, Kuramata Akito, Yamakoshi Shigenobu, Fujita Shizuo, Ohtomo Akira

JAPANESE JOURNAL OF APPLIED PHYSICS   52 ( 5 )   51101 - 051101-5   2013.5

Spontaneous atomic ordering and magnetism in epitaxially stabilized double perovskites Reviewed International journal

A. Ohtomo, S. Chakraverty, H. Mashiko, T. Oshima, M. Kawasaki

Journal of Materials Research   Volume 28 ( 5 )   689 - 695   2013.1

Electronic conduction at the interfaces of complex oxide heterojunctions

OHTOMO Akira

81 ( 12 )   1002 - 1008   2012.12

Spontaneous atomic ordering and magnetism in epitaxially stabilized double-perovskites Reviewed International journal

Akira Ohtomo, Akira Ohtomo, Suvankar Chakraverty, Hisanori Mashiko, Takayoshi Oshima, Masashi Kawasaki, Masashi Kawasaki, Masashi Kawasaki

Materials Research Society Symposium Proceedings   1454   3 - 13   2012.12

Epitaxial growth of gamma-Ga2O3 films by mist chemical vapor deposition Reviewed International journal

Oshima Takayoshi, Nakazono Taishi, Mukai Akira, Ohtomo Akira

JOURNAL OF CRYSTAL GROWTH   359   60 - 63   2012.11

Epitaxial Structures of Band-Gap-Engineered alpha-(CrxFe1-x)(2)O-3 (0 <= x <= 1) Films Grown on C-Plane Sapphire Reviewed International journal

Mashiko Hisanori, Oshima Takayoshi, Ohtomo Akira

JAPANESE JOURNAL OF APPLIED PHYSICS   51 ( 11 )   11PG11 - 11PG11-5   2012.11

Band-gap narrowing in α-(Cr_xFe_1-x)₂O₃ solid-solution films Reviewed International journal

H. Mashiko, T. Oshima, A. Ohtomo

Applied Physics Letters   Vol. 99 ( 24 )   241904-1-3   2011.12

Magnetic properties of Sr2FeTaO6 double perovskite epitaxially grown by pulsed-laser deposition International journal

S. Chakraverty, M. Saito, S. Tsukimoto, Y. Ikuhara, A. Ohtomo, M. Kawasaki

APPLIED PHYSICS LETTERS   99 ( 22 )   223101 - 223103   2011.11

Magnetic and electronic properties of ordered double-perovskite La 2VMnO6 thin films Reviewed

S. Chakraverty, K. Yoshimatsu, Y. Kozuka, H. Kumigashira, M. Oshima, T. Makino, A. Ohtomo, M. Kawasaki

Physical Review B - Condensed Matter and Materials Physics   84 ( 13 )   2011.10

Magnetic and electronic properties of ordered double-perovskite La2VMnO6 thin films Reviewed International journal

K. Yoshimatsu, S. Chakraverty, Y. Kozuka, H. Kumigashira, M. Oshima, T. Makino, A. Ohtomo, M. Kawasaki

Physical Review B   Vol. 84 ( 13 )   132411-1-4   2011.10

Ferrimagnetism and spontaneous ordering of transition metals in double perovskite La₂CrFeO₆ films Reviewed International journal

S. Chakraverty, A. Ohtomo, D. Okuyama, M. Saito, M. Okude, R. Kumai, T. Arima, Y. Tokura, S. Tsukimoto, Y. Ikuhara, M. Kawasaki

Physical Review B   Vol. 84 ( 6 )   064436-1-5   2011.8

Improvement of Electron Mobility above 100,000 cm(2) V-1 s(-1) in MgxZn1-xO/ZnO Heterostructures Reviewed International journal

Shunsuke Akasaka, Atsushi Tsukazaki, Ken Nakahara, Akira Ohtomo, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS   50 ( 8 )   080215-1-3   2011.8

Preparation of an Epitaxy-Ready Surface of a ZnO(0001) Substrate Reviewed International journal

Shunsuke Akasaka, Ken Nakahara, Hiroyuki Yuji, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   4 ( 3 )   035701-1-3   2011.3

Electric-field control of two-dimensional electrons in polymer-gated oxide semiconductor heterostructures Reviewed International journal

M. Nakano, A. Tsukazaki, A. Ohtomo, K. Ueno, S. Akasaka, H. Yuji, K. Nakahara, T. Fukumura, M. Kawasaki

Advanced Materials   22 ( No. 8 )   876 - 879   2010.12

Controlled B-site ordering in Sr2CrReO6 double perovskite films by using pulsed laser interval deposition International journal

S. Chakraverty, A. Ohtomo, M. Kawasaki

APPLIED PHYSICS LETTERS   97 ( 24 )   243107 - 243109   2010.12

Dimensionality-driven insulator–metal transition in A-site excess non-stoichiometric perovskites Reviewed International journal

Z. Wang, M. Okude, M. Saito, S. Tsukimoto, A. Ohtomo, M. Tsukada, M. Kawasaki, Y. Ikuhara

Nature Communications   Vol. 1   106-1-7   2010.11

Observation of the fractional quantum Hall effect in an oxide Reviewed International journal

A. Tsukazaki, S. Akasaka, K. Nakahara, Y. Ohno, H. Ohno, D. Maryenko, A. Ohtomo, M. Kawasaki

Nature Materials   Vol. 9 ( No. 11 )   889 - 893   2010.10

Nitrogen doped MgxZn_1-xO/ZnO single heterostructure ultraviolet light-emitting diodes on ZnO substrates Reviewed International journal

K. Nakahara, S. Akasaka, H. Yuji, K. Tamura, T. Fujii, Y. Nishimoto, D. Takamizu, A.Sasaki, T. Tanabe, H. Takasu, H. Amaike, T. Onuma, S. F. Chichibu, A.Tsukazaki, A. Ohtomo, M. Kawasaki

Applied Physics Letters   97 ( 1 )   013501(1) - (3)   2010.7

酸化亜鉛系分極不整合界面の2次元伝導と導電性高分子を用いた伝導性制御

塚崎敦, 中野匡規, 大友明, 上野和紀, 赤坂俊輔, 湯地洋行, 中原健, 福村知昭, 川崎雅司

まてりあ   49 ( 7月 )   312 - 313   2010.7

Optimization of the Growth Conditions for Molecular Beam Epitaxy of MgxZn_1-xO (0 ≤ x ≤ 0.12) Films on Zn-polar ZnO Substrates Reviewed International journal

H. Yuji, K. Nakahara, K. Tamura, S. Akasaka, Y. Nishimoto, D. Takamizu, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki

Japanese Journal of Applied Physics   49 ( 7 )   071104 1 - 5   2010.7

Hydrogenation-Induced Surface Polarity Recognition and Proton Memory Behavior at Protic-Ionic-Liquid/Oxide Electric-Double-Layer Interfaces Reviewed International journal

Hongtao Yuan, Hidekazu Shimotani, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki, Yoshihiro Iwasa

Journal of the American Chemical Society   132 ( 19 )   6672 - 6678   2010.5

Electronic-Field Control of Two-Dimensional Electrons in Polymer-Gated-Oxide Semiconductor Heterostructures (vol 22, pg 876, 2010) Reviewed

Masaki Nakano, Atsushi Tsukazaki, Akira Ohtomo, Kazunori Ueno, Shunsuke Akasaka, Hiroyuki Yuji, Ken Nakahara, Tomoteru Fukumura, Masashi Kawasaki

ADVANCED MATERIALS   22 ( 14 )   1553 - 1553   2010.4

Spatial distribution of two-dimensional electron gas in a ZnO/Mg_0.2Zn_0.8O geterostructure probed with a conducting polymer Schottky contact Reviewed International journal

M. Nakano, A. Tsukazaki, K. Ueno, R. Y. Gunji, A. Ohtomo, T. Fukumura, M. Kawasaki

Applied Physics Letters   96 ( No. 5 )   052116-1 - 052116-3   2010.2

MgxZn1-xO Films with a Low Residual Donor Concentration (&lt; 10(15) cm(-3)) Grown by Molecular Beam Epitaxy Reviewed International journal

Shunsuke Akasaka, Ken Nakahara, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   3 ( 7 )   071101-1-3   2010

Epitaxial structure of (001)- and (111)-oriented perovskite ferrate films grown by pulsed-laser deposition International journal

S. Chakraverty, A. Ohtomo, M. Okude, K. Ueno, M. Kawasaki

Crystal Growth & Design   10 ( 4 )   1725 - 1729   2010

Excitonic characteristics in direct wide band-gap CuScO₂ epitaxial thin films Reviewed International journal

H. Hiraga, T. Makino, T. Fukumura, A. Ohtomo, M. Kawasaki

Appl. Phys. Lett.   95 ( 211908 )   1 - 3   2009.11

Magneto-optical study of n-type modulation-doped ZnO/Mg_xZn_1-xO single quantum well structures Reviewed International journal

T. Makino, Y. Furuta, Y. Segawa, A. Tsukazaki, A. Ohtomo, Y. Hirayama, R. Shen, S. Takeyama, Y. Takagi, M. Kawasaki

Physical Review B   80 ( No. 15 )   155333-1 - 155333-5   2009.10

Optical and magnetic properties of CuMnO2 epitaxial thin films with a delafossite-derivative structure International journal

H. Hiraga, T. Fukumura, A. Ohtomo, T. Makino, A. Ohkubo, H. Kimura, M. Kawasaki

APPLIED PHYSICS LETTERS   95 ( 3 )   032109-1-032109-3   2009.7

High-Density Carrier Accumulation in ZnO Field-Effect Transistors Gated by Electric Double Layers of Ionic Liquids International journal

Hongtao Yuan, Hidekazu Shimotani, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki, Yoshihiro Iwasa

ADVANCED FUNCTIONAL MATERIALS   19 ( 7 )   1046 - 1053   2009.4

酸化亜鉛系薄膜トランジスタ

大友 明, 川崎 雅司

月刊ディスプレイ   15 ( 4 )   26 - 31   2009.4

Crystal Structure and Valence Distribution of [(LaMnO3)(m)(SrMnO3)(m)](n) Artificial Superlattices International journal

Hironori Nakao, Jun Nishimura, Youichi Murakami, Akira Ohtomo, Tomoteru Fukumura, Masashi Kawasaki, Takashi Koida, Yusuke Wakabayashi, Hiroshi Sawa

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   78 ( 2 )   024602-1-024602-10   2009.2

MgxZn1-xO-Based Schottky Photodiode for Highly Color-Selective Ultraviolet Light Detection International journal

Masaki Nakano, Takayuki Makino, Atsushi Tsukazaki, Kazunori Ueno, Akira Ohtomo, Tomoteru Fukumura, Hiroyuki Yuji, Yoshio Nishimoto, Shunsuke Akasaka, Daiju Takamizu, Ken Nakahara, Tetsuhiro Tanabe, Akira Kamisawa, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   1 ( 12 )   121201-1-121201-3   2008.12

Spin susceptibility and effective mass of two-dimensional electrons in MgxZn1-xO/ZnO heterostructures International journal

A. Tsukazaki, A. Ohtomo, M. Kawasaki, S. Akasaka, H. Yuji, K. Tamura, K. Nakahara, T. Tanabe, A. Kamisawa, T. Gokmen, J. Shabani, M. Shayegan

PHYSICAL REVIEW B   78 ( 23 )   233308-1-233308-4   2008.12

Photoexcitation screening of the built-in electric field in ZnO single quantum wells International journal

T. Makino, Y. Segawa, A. Tsukazaki, A. Ohtomo, M. Kawasaki

APPLIED PHYSICS LETTERS   93 ( 12 )   121907-1-121907-3   2008.9

Plasma-assisted molecular beam epitaxy of high optical quality MgZnO films on Zn-polar ZnO substrates International journal

Yoshio Nishimoto, Ken Nakahara, Daiju Takamizu, Atsushi Sasaki, Kentaro Tamura, Shunsuke Akasaka, Hiroyuki Yuji, Tetsuo Fujii, Tetsuhiro Tanabe, Hidemi Takasu, Atsushi Tsukazaki, Akira Ohtomo, Takeyoshi Onuma, Shigefusa F. Chichibu, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   1 ( 9 )   091202-1-091202-3   2008.9

Transparent polymer Schottky contact for a high performance visible-blind ultraviolet photodiode based on ZnO International journal

M. Nakano, T. Makino, A. Tsukazaki, K. Ueno, A. Ohtomo, T. Fukumura, H. Yuji, S. Akasaka, K. Tamura, K. Nakahara, T. Tanabe, A. Kamisawa, M. Kawasaki

APPLIED PHYSICS LETTERS   93 ( 12 )   123309-1-123309-3   2008.9

Epitaxial synthesis of Srn+1TinO3n+1 (n=2-5) Ruddlesden-Popper homologous series by pulsed-laser deposition International journal

Masaki Okude, Akira Ohtomo, Takuji Kita, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   1 ( 8 )   081201-1-081201-3   2008.8

Effect of in situ annealed SnO(2) buffer layer on structural and electrical properties of (001) SnO(2)/TiO(2) heterostructures International journal

Masaki Okude, Kazunori Ueno, Shun Itoh, Masae Kikuchi, Akira Ohtomo, Masashi Kawasaki

JOURNAL OF PHYSICS D-APPLIED PHYSICS   41 ( 12 )   125309-1-125309-4   2008.6

Quantitative conductivity mapping of SrTiO3-LaAlO3-LaTiO3 ternary composition-spread thin film by scanning microwave microscope International journal

Sohei Okazaki, Noriaki Okazaki, Yasushi Hirose, Jun Nishimura, Kazunori Ueno, Akira Ohtomo, Masashi Kawasaki, Hideomi Koinuma, Tetsuya Hasegawa

APPLIED PHYSICS EXPRESS   1 ( 5 )   055003-1-055003-3   2008.5

High electron mobility exceeding 10(4) cm(2) V-1 s(-1) in MgxZn1-xO/ZnO single heterostructures grown by molecular beam epitaxy International journal

Atsushi Tsukazaki, Hiroyuki Yuji, Shunsuke Akasaka, Kentaro Tamura, Ken Nakahara, Tetsuhiro Tanabe, Hidemi Takasu, Akira Ohtomo, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   1 ( 5 )   055004-1-055004-3   2008.5

High-throughput screening for combinatorial thin-film library of thermoelectric materials International journal

Masaki Watanabe, Takuji Kita, Tornoteru Fukumura, Akira Ohtomo, Kazunori Ueno, Masashi Kawasaki

JOURNAL OF COMBINATORIAL CHEMISTRY   10 ( 2 )   175 - 178   2008.3

ペロブスカイト酸化物界面の原子層成長制御

大友 明

機能材料   28 ( 3 )   15 - 20   2008.2

Surface and Interface Engineering and Observation of Quantum Transport in ZnO Based Heterojunctions

OHTOMO Akira, TSUKAZAKI Atsushi, KAWASAKI Masashi

Journal of the Surface Science Society of Japan   29 ( 1 )   10 - 17   2008

Atomic-layer growth control of perovskite oxide heterointerface

CMC Publishing Co., Ltd.,Function & Materials   28 ( 3 )   15 - 20   2008

Polymer Schottky contact on O-polar ZnO with silane coupling agent as surface protective layer

R. Y. Gunji, M. Nakano, A. Tsukazaki, A. Ohtomo, T. Fukumura, M. Kawasaki

Applied Physics Letters   93 ( 1 )   012104-1-012104-3   2008

Electric-field-induced superconductivity in an insulator International journal

K. Ueno, S. Nakamura, H. Shimotani, A. Ohtomo, N. Kimura, T. Nojima, H. Aoki, Y. Iwasa, M. Kawasaki

Nat. Mater.   7 ( 11 )   855 - 858   2008

MgxZn1-xO epitaxial films grown on ZnO substrates by molecular beam epitaxy International journal

H. Yuji, K. Nakahara, K. Tamura, S. Akasaka, A. Sasaki, T. Tanabe, H. Takasu, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki

ZINC OXIDE MATERIALS AND DEVICES III   6895   68950D   2008

Photoinduced insulator-to-metal transition in ZnO/Mg_0.15Zn_0.85O heterostructures

Appl. Phys. Lett.   92   052105-1-052105-3   2008

Low-temperature field-effect and magnetotransport properties in a ZnO based heterostructure with atomic-layer-deposited gate dielectric International journal

A. Tsukazaki, A. Ohtomo, D. Chiba, Y. Ohno, H. Ohno, M. Kawasaki

Applied Physics Letters   93 ( No. 24 )   241905-1-241905-3   2008

Epitaxial Growth and Transport Properties of High-Mobility ZnO-Based Heterostructures Reviewed

A. Tsukazaki, A. Ohtomo, M. Kawasaki

FRONTIERS IN MATERIALS RESEARCH   10   77 - +   2008

Parallel syntheses and thermoelectric properties of Ce-doped SrTiO3 thin films

Y. F. Yamada, A. Ohtomo, M. Kawasaki

Applied Surface Science   254 ( 3 )   768 - 771   2007.11

Combinatorial synthesis and high throughput evaluation of thermoelectric power factor in Mg-Si-Ge ternary compounds International journal

M. Watanabe, T. Kita, T. Fukumura, A. Ohtomo, K. Ueno, M. Kawasaki

APPLIED SURFACE SCIENCE   254 ( 3 )   777 - 780   2007.11

Schottky contact on a ZnO (0001) single crystal with conducting polymer International journal

M. Nakano, A. Tsukazaki, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki

APPLIED PHYSICS LETTERS   91 ( 14 )   142113-1-142113-3   2007.10

Growth mode control of the free carrier density in SrTiO3-delta films International journal

A. Ohtomo, H. Y. Hwang

JOURNAL OF APPLIED PHYSICS   102 ( 8 )   83704-1-83704-6   2007.10

目に見えない電子回路につながる半導体技術 －透明な酸化物半導体の量子ホール効果を世界で初めて観測－

大友 明

電子情報通信学会誌   90 ( 7 )   563 - 564   2007.7

Invisible electronics now in sight

Akira Ohtomo

The Japan Journal   4 ( 3 )   27 - 27   2007.7

Recombination dynamics of excitons in Mg0.11Zn0.89O alloy films grown using the high-temperature-annealed self-buffer layer by laser-assisted molecular-beam epitaxy International journal

Masashi Kubota, Takeyoshi Onuma, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki, Takayuki Sota, Shigefusa F. Chichibu

APPLIED PHYSICS LETTERS   90 ( 14 )   141903-1-141903-3   2007.4

Quantum hall effect in polar oxide heterostructures International journal

A. Tsukazaki, A. Ohtomo, T. Kita, Y. Ohno, H. Ohno, M. Kawasaki

Science   315 ( 5817 )   1388 - 1391   2007.3

Quantum hall effect in ZnO/MgZnO heterostructures

Solid state physics   42 ( 9 )   559 - 567   2007

A semiconductor technology towards realizing invisible electronics -The world first observation of quantum Hall effect in a transparent oxide semiconductor-

The Institute of Electronics, Information and Communication Engineers (IEICE),The Journal of the Institute of Electronics, Information and Communication Engineers (J. IEICE)   90 ( 7 )   563 - 564   2007

Insulator-to-metal transition in ZnO by electric double layer gating International journal

Hidekazu Shimotani, Haruhiko Asanuma, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki, Yoshihiro Iwasa

Applied Physics Letters   91 ( 8 )   082106-1-082106-3   2007

Quantum Hall effect in ZnO based heterostructures International journal

A. Tsukazaki, A. Ohtomo, S. Akasaka, K. Nakahara, Y. Ohno, H. Ohno, M. Kawasaki

Japanese Society of Applied Physics (Division of Solid State Physics and Application),Bulletin of Solid State Physics and Application   13 ( 2 )   73 - 78   2007

Nanoparticle technology handbook

Elsevier   2007

Hole transport in p-type ZnO

Takayuki Makino, Atsushi Tsukazaki, Akira Ohtomo, Masashi Kawasaki, Hideomi Koinuma

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   45 ( 8 A )   6346 - 6351   2006.8

Photo-irresponsive thin-film transistor with MgxZn1-xO channel International journal

Akira Ohtomo, Shingo Takagi, Kentaro Tamura, Takayuki Makino, Yusaburo Segawa, Hideomi Koinuma, Masashi Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS   45 ( 24-28 )   L694 - L696   2006.7

Shifting donor-acceptor photoluminescence in N-doped ZnO International journal

Takayuki Makino, Atsushi Tsukazaki, Akira Ohtomo, M. Kawasaki, Hideomi Koinuma

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 7 )   073701-1-073701-4   2006.7

Electronic transport properties in SrTiO3-LaAiO3 solid-solution films

A. Ohtomo, J. Nishimura, Y. Murakami, M. Kawasaki

Applied Physics Letters   88 ( 23 )   232107-1-232107-3   2006.6

Improvements in quantum efficiency of excitonic emissions in ZnO epilayers by the elimination of point defects

S. F. Chichibu, T. Onuma, M. Kubota, A. Uedono, T. Sota, A. Tsukazaki, A. Ohtomo, M. Kawasaki

Journal of Applied Physics   99 ( 9 )   093505-1-093505-6   2006.5

A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface (vol 427, pg 423, 2004)

A Ohtomo, HY Hwang

NATURE   441 ( 7089 )   120 - 120   2006.5

High-mobility electronic transport in ZnO thin films International journal

A. Tsukazaki, A. Ohtomo, M. Kawasaki

Applied Physics Letters   88 ( 15 )   152106-1-152106-3   2006.4

Field-effect modulation of transport properties of charge-ordered La1/3Sr2/3FeO3 thin films International journal

K Ueno, A Ohtomo, F Sato, M Kawasaki

PHYSICAL REVIEW B   73 ( 16 )   165103-1-165103-5   2006.4

Monte Carlo simulation of localization dynamics of excitons in ZnO and CdZnO quantum well structures International journal

T Makino, K Saito, A Ohtomo, M Kawasaki, RT Senger, KK Bajaj

JOURNAL OF APPLIED PHYSICS   99 ( 6 )   066108-1-066108-3   2006.3

High-throughput synthesis and characterization of Mg1-xCaxO films as a lattice and valence-matched gate dielectric for ZnO based field effect transistors International journal

J Nishii, A Ohtomo, M Ikeda, Y Yamada, K Ohtani, H Ohno, M Kawasaki

APPLIED SURFACE SCIENCE   252 ( 7 )   2507 - 2511   2006.1

Analysis on reflection spectra in strained ZnO thin films International journal

T Makino, Y Segawa, M Kawasaki, A Ohtomo

JOURNAL OF CRYSTAL GROWTH   287 ( 1 )   124 - 127   2006.1

Development of high-throughput combinatorial terahertz time-domain spectrometer and its application to ternary composition-spread film

M Ohtani, T Hitosugi, Y Hirose, J Nishimura, A Ohtomo, M Kawasaki, R Inoue, M Tonouchi, T Shimada, T Hasegawa

APPLIED SURFACE SCIENCE   252 ( 7 )   2622 - 2627   2006.1

Combinatorial synthesis and optical characterization of alloy and superlattice films based on SrTiO3 and LaAlO3 International journal

A Ohkubo, A Ohtomo, J Nishimura, T Makino, Y Segawa, M Kawasaki

APPLIED SURFACE SCIENCE   252 ( 7 )   2488 - 2492   2006.1

Self-assembled ZnO nano-crystals and exciton lasing at room temperature International journal

ZK Tang, M Kawasaki, A Ohtomo, H Koinuma, Y Segawa

JOURNAL OF CRYSTAL GROWTH   287 ( 1 )   169 - 179   2006.1

Majority-carrier mobilities in undoped and n-type doped ZnO epitaxial layers International journal

T Makino, Y Segawa, A Tsukazaki, A Ohtomo, M Kawasaki

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO 4   3 ( 4 )   956 - +   2006

Analysis of Time-Resolved Donor–Acceptor Photoluminescence of N-Doped ZnO

Makino Takayuki, Tsukazaki Atsushi, Ohtomo Akira, Kawasaki M., Koinuma Hideomi

J Phys Soc Jpn   75 ( 9 )   095001-1-095001-3 - 095001-3   2006

Two different features of ZnO: transparent ZnO : Ga electrodes for InGaN-LEDs and homoepitaxial ZnO films for UV-LEDs

K. Nakahara, H. Yuji, K. Tamura, S. Akasaka, H. Tampo, S. Niki, A. Tsukazaki, A. Ohtomo, M. Kawasaki

ZINC OXIDE MATERIALS AND DEVICES   6122   61220N   2006

Spectral shape analysis of ultraviolet luminescence in n-type ZnO : Ga International journal

T Makino, Y Segawa, S Yoshida, A Tsukazaki, A Ohtomo, M Kawasaki, H Koinuma

JOURNAL OF APPLIED PHYSICS   98 ( 9 )   093520-1-093520-4   2005.11

ZnO青色発光ダイオード

塚崎 敦, 大友 明, 川崎 雅司

応用物理   74 ( 10 )   1359 - 1364   2005.10

Free-carrier effects on zero- and one-phonon absorption onsets of n-type ZnO International journal

T Makino, Y Segawa, S Yoshida, A Tsukazaki, A Ohtomo, M Kawasaki, H Koinuma

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS   44 ( 10 )   7275 - 7280   2005.10

High-mobility field-effect transistors based on single-crystalline ZnO channels

Junya Nishh, Akira Ohtomo, Keita Ohtani, Hideo Ohno, Masashi Kawasaki

Japanese Journal of Applied Physics, Part 2: Letters   44 ( 37-41 )   L1193 - L1195   2005.9

Electron transport in ZnO thin films International journal

T Makino, Y Segawa, A Tsukazaki, A Ohtomo, M Kawasaki

APPLIED PHYSICS LETTERS   87 ( 2 )   022101-1-022101-3   2005.7

Pulsed laser deposition of thin films and superlattices based on ZnO

Akira Ohtomo, Atsushi Tsukazaki

Semiconductor Science and Technology   20 ( 4 )   S1 - S12   2005.4

Exciton-polariton spectra and limiting factors for the room-temperature photoluminescence efficiency in ZnO International journal

SF Chichibu, A Uedono, A Tsukazaki, T Onuma, M Zamfirescu, A Ohtomo, A Kavokin, G Cantwell, CW Litton, T Sota, M Kawasaki

SEMICONDUCTOR SCIENCE AND TECHNOLOGY   20 ( 4 )   S67 - S77   2005.4

Fabrication of ternary phase composition-spread thin film libraries and their high-throughput characterization: Ti1-x-yZrxHfyO2 for bandgap engineering International journal

Y Yamada, T Fukumura, M Ikeda, M Ohtani, H Toyosaki, A Ohtomo, F Matsukura, H Ohno, M Kawasaki

JOURNAL OF SUPERCONDUCTIVITY   18 ( 1 )   109 - 113   2005.2

酸化亜鉛電界効果デバイスの進展と課題

大友 明, 川崎 雅司, 大野 英男

応用電子物性分科会誌   11 ( 1 )   26 - 33   2005.1

Engineered lattice-mismatch by buffer layers in oxide heteroepitaxy

Kawasaki Masashi, Terai Kota, Tsukazaki Atsushi, Ohnishi Tsuyoshi, Ohtomo Akira, Lippmaa Mikk

The Japanese Association for Crystal Growth,Journal of the Japanese Association of Crystal Growth   32 ( 2 )   74 - 81   2005

Recent progresses and issues of ZnO-based field-effect transistors

Japanese Society of Applied Physics (Division of Solid State Physics and Application),Bulletin of Solid State Physics and Application   11 ( 1 )   26 - 33   2005

Fabrication of ternary phase composition-spread thin film libraries and their high-throughput characterization: Ti1-x-yZrxHf yO2 for bandgap engineering Reviewed

Y. Yamada, T. Fukumura, M. Ikeda, M. Ohtani, H. Toyosaki, A. Ohtomo, F. Matsukura, H. Ohno, M. Kawasaki

Journal of Superconductivity and Novel Magnetism   18 ( 1 )   109 - 113   2005

ZnO light-emitting diodes - Improved crystallline quality gave a new application to an old materials

The Ceramic Society of Japan,Bulletin of the Ceramic Society of Japan   40 ( 9 )   749 - 751   2005

酸化亜鉛発光ダイオード－結晶品質の向上がもたらした古い材料の新たな応用－

塚崎 敦, 大友 明, 川崎 雅司

日本セラミックス協会 セラミックス   40 ( 9 )   749 - 751   2005

Repeated temperature modulation epitaxy for p-type doping and light-emitting diode based on ZnO

TSUKAZAKI A.

Nature Mater.   4 ( 1 )   42 - 46   2005

酸化亜鉛電界効果デバイス

大友 明, 川崎 雅司, 大野 英男

アグネ技術センター 固体物理   40 ( 6 )   407 - 414   2005

Blue light-emitting diode based on ZnO

Atsushi Tsukazaki, Masashi Kubota, Akira Ohtomo, Takeyoshi Onuma, Keita Ohtani, Hideo Ohno, Shigefusa F. Chichibu, Masashi Kawasaki

Japanese Journal of Applied Physics, Part 2: Letters   44 ( 20-23 )   L643 - L645   2005

Hall and field-effect mobilities of electrons accumulated at a lattice-matched ZnO/ScAIMgO(4) heterointerface International journal

TI Suzuki, A Ohtomo, A Tsukazaki, F Sato, J Nishii, H Ohno, M Kawasaki

ADVANCED MATERIALS   16 ( 21 )   1887 - +   2004.11

Gallium concentration dependence of room-temperature near-band-edge luminescence in n-type ZnO : Ga International journal

T Makino, Y Segawa, S Yoshida, A Tsukazaki, A Ohtomo, M Kawasaki

APPLIED PHYSICS LETTERS   85 ( 5 )   759 - 761   2004.8

Atomic-scale imaging of nanoengineered oxygen vacancy profiles in SrTiO3 International journal

DA Muller, N Nakagawa, A Ohtomo, JL Grazul, HY Hwang

NATURE   430 ( 7000 )   657 - 661   2004.8

Controlled carrier generation at a polarity-discontinued perovskite heterointerface International journal

J Nishimura, A Ohtomo, A Ohkubo, Y Murakami, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS   43 ( 8A )   L1032 - L1034   2004.8

SrTiO_3_ヘテロ構造の高移動度電子輸送

大友 明, ファン ハロルド

応用物理   73 ( 5 )   605 - 609   2004.5

Emission from the higher-order excitons in ZnO films grown by laser molecular-beam epitaxy International journal

A Tsukazaki, A Ohtomo, M Kawasaki, T Makino, CH Chia, Y Segawa, H Koinuma

APPLIED PHYSICS LETTERS   84 ( 19 )   3858 - 3860   2004.5

一格子層の結晶成長から生まれる新しい物理

大友 明, ファン ハロルド

パリティ   19 ( 5 )   18 - 25   2004.5

High-mobility electrons in SrTiO3 heterostructures International journal

HY Hwang, A Ohtomo, N Nakagawa, DA Muller, JL Grazul

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES   22 ( 1-3 )   712 - 716   2004.4

Internal electric field effect on luminescence properties of ZnO/(Mg,Zn)O quantum wells International journal

T Makino, A Ohtomo, CH Chia, Y Segawa, H Koinuma, M Kawasaki

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES   21 ( 2-4 )   671 - 675   2004.3

Modeling of grain boundary barrier modulation in ZnO invisible thin film transistors International journal

FM Hossain, J Nishii, S Takagi, T Sugihara, A Ohtomo, T Fukumura, H Koinuma, H Ohno, M Kawasaki

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES   21 ( 2-4 )   911 - 915   2004.3

Surface depletion in doped SrTiO3 thin films

A Ohtomo, HY Hwang

APPLIED PHYSICS LETTERS   84 ( 10 )   1716 - 1718   2004.3

Second harmonic generation in self-assembled ZnO microcrystallite thin films International journal

XQ Zhang, ZK Tang, M Kawasaki, A Ohtomo, H Koinuma

THIN SOLID FILMS   450 ( 2 )   320 - 323   2004.3

SIMS analysis of ZnO films co-doped with N and Ga by temperature gradient pulsed laser deposition International journal

M Sumiya, A Tsukazaki, S Fuke, A Ohtomo, H Koinuma, M Kawasaki

APPLIED SURFACE SCIENCE   223 ( 1-3 )   206 - 209   2004.2

A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface International journal

A Ohtomo, HY Hwang

NATURE   427 ( 6973 )   423 - 426   2004.1

Optical gain in self-assembled ZnO microcrysallite thin films International journal

XQ Zhang, Z Tang, M Kawasaki, A Ohtomo, H Koinuma

JOURNAL OF CRYSTAL GROWTH   259 ( 3 )   286 - 290   2003.12

Modeling and simulation of polycrystalline ZnO thin-film transistors International journal

FM Hossain, J Nishii, S Takagi, A Ohtomo, T Fukumura, H Fujioka, H Ohno, H Koinuma, M Kawasaki

JOURNAL OF APPLIED PHYSICS   94 ( 12 )   7768 - 7777   2003.12

Layer-by-layer growth of high-optical-quality ZnO film on atomically smooth and lattice relaxed ZnO buffer layer International journal

A Tsukazaki, A Ohtomo, S Yoshida, M Kawasaki, CH Chia, T Makino, Y Segawa, T Koida, SF Chichibu, H Koinuma

APPLIED PHYSICS LETTERS   83 ( 14 )   2784 - 2786   2003.10

Resonant exciton second-harmonic generation in self-assembled ZnO microcrystallite thin films International journal

XQ Zhang, ZK Tang, M Kawasaki, A Ohtomo, H Koinuma

JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 30 )   5191 - 5196   2003.8

Temperature quenching of exciton luminescence intensity in ZnO/(Mg,Zn)O multiple quantum wells International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

JOURNAL OF APPLIED PHYSICS   93 ( 10 )   5929 - 5933   2003.5

High mobility thin film transistors with transparent ZnO channels International journal

J Nishii, FM Hossain, S Takagi, T Aita, K Saikusa, Y Ohmaki, Ohkubo, I, S Kishimoto, A Ohtomo, T Fukumura, F Matsukura, Y Ohno, H Koinuma, H Ohno, M Kawasaki

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS   42 ( 4A )   L347 - L349   2003.4

Quantitative control and detection of heterovalent impurities in ZnO thin films grown by pulsed laser deposition

M. Sumiya, S. Fuke, A. Tsukazaki, K. Tamura, A. Ohtomo, M. Kawasaki, H. Koinuma

Journal of Applied Physics   93 ( 5 )   2562 - 2569   2003.3

Confinement-enhanced biexciton binding energy in ZnO/ZnMgO multiple quantum wells International journal

CH Chia, T Makino, K Tamura, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

APPLIED PHYSICS LETTERS   82 ( 12 )   1848 - 1850   2003.3

Charge modulation and metallic conduction of band insulator-Mott insulator interfaces

Akira Ohtomo

The Physical Society of Japan,Butsuri   58 ( 6 )   425 - 429   2003

Size dependence of exciton-longitudinal-optical-phonon coupling in ZnO/Mg0.27Zn0.73O quantum wells International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

PHYSICAL REVIEW B   66 ( 23 )   233305-1-233305-3   2002.12

Photoluminescence properties of ZnO epitaxial layers grown on lattice-matched ScAlMgO4 substrates International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

JOURNAL OF APPLIED PHYSICS   92 ( 12 )   7157 - 7159   2002.12

Effect of MgZnO-layer capping on optical properties of ZnO epitaxial layers International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

APPLIED PHYSICS LETTERS   81 ( 12 )   2172 - 2174   2002.9

Radiative recombination of electron-hole pairs spatially separated due to quantum-confined Stark and Franz-Keldish effects in ZnO/Mg0.27Zn0.73O quantum wells International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

APPLIED PHYSICS LETTERS   81 ( 13 )   2355 - 2357   2002.9

Artificial charge-modulation in atomic-scale perovskite titanate superlattices International journal

A Ohtomo, DA Muller, JL Grazul, HY Hwang

NATURE   419 ( 6905 )   378 - 380   2002.9

Epitaxial growth and electronic structure of LaTiOx films International journal

A Ohtomo, DA Muller, JL Grazul, HY Hwang

APPLIED PHYSICS LETTERS   80 ( 21 )   3922 - 3924   2002.5

Phonon replicas in ZnO/ZnMgO multiquantum wells International journal

HD Sun, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

JOURNAL OF APPLIED PHYSICS   91 ( 10 )   6457 - 6460   2002.5

High-throughput optical characterization for the development of a ZnO-based ultraviolet semiconductor-laser

T. Makino, C. H. Chia, Y. Segawa, M. Kawasaki, A. Ohtomo, K. Tamura, Y. Matsumoto, H. Koinuma

Applied Surface Science   189 ( 3-4 )   277 - 283   2002.4

Optical properties of ZnO:Al epilayers: Observation of room-temperature many-body absorption-edge singularity

T. Makino, T. Makino, K. Tamura, K. Tamura, C. H. Chia, C. H. Chia, Y. Segawa, Y. Segawa, M. Kawasaki, M. Kawasaki, A. Ohtomo, H. Koinuma

Physical Review B - Condensed Matter and Materials Physics   65 ( 12 )   1212011 - 1212014   2002.3

Optical properties of ZnO : Al epilayers: Observation of room-temperature many-body absorption-edge singularity International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

PHYSICAL REVIEW B   65 ( 12 )   121201(R)-1-121201(R)-4   2002.3

Enhancement of exciton binding energies in ZnO/ZnMgO multiquantum wells

HD Sun, T Makino, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

JOURNAL OF APPLIED PHYSICS   91 ( 4 )   1993 - 1997   2002.2

Observation of biexciton emission in ZnO/ZnMgO multi-quantum wells International journal

HD Sun, Y Segawa, T Makino, CH Chia, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

PHYSICA STATUS SOLIDI B-BASIC RESEARCH   229 ( 2 )   867 - 870   2002.1

Optical properties of ZnO : Al epilayers and of undoped epilayers capped by wider-gap MgZnO grown by laser MBE International journal

T Makino, K Tamura, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, H Koinuma

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS   229 ( 2 )   853 - 857   2002.1

Well-width dependence of radiative and nonradiative lifetimes in ZnO-based multiple quantum wells International journal

CH Chia, T Makino, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

PHYSICA STATUS SOLIDI B-BASIC RESEARCH   229 ( 2 )   863 - 866   2002.1

High throughput x-ray diffractometer for combinatorial epitaxial thin films International journal

M Ohtani, T Fukumura, A Ohtomo, T Kikuchi, K Omote, H Koinuma, M Kawasaki

COMBINATORIAL AND ARTIFICIAL INTELLIGENCE METHODS IN MATERIALS SCIENCE   700 ( No. )   125 - 130   2002

Exciton localization in (Cd,Zn)O epilayers and (Cd,Zn)O/(Mg,Zn)O multi-quantum wells on lattice matched substrates International journal

T Makino, NT Tuan, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

INTERNATIONAL JOURNAL OF MODERN PHYSICS B   15 ( 28-30 )   3853 - 3856   2001.12

Concurrent x-ray diffractometer for high throughput structural diagnosis of epitaxial thin films International journal

M Ohtani, T Fukumura, M Kawasaki, K Omote, T Kikuchi, J Harada, A Ohtomo, M Lippmaa, T Ohnishi, D Komiyama, R Takahashi, Y Matsumoto, H Koinuma

APPLIED PHYSICS LETTERS   79 ( 22 )   3594 - 3596   2001.11

Well-width dependence of radiative and nonradiative recombination times in ZnO/Mg0.12Zn0.88O multiple quantum wells International journal

CH Chia, T Makino, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

JOURNAL OF APPLIED PHYSICS   90 ( 7 )   3650 - 3652   2001.10

Strain effects on exciton resonance energies of ZnO epitaxial layers International journal

T Makino, T Yasuda, Y Segawa, A Ohtomo, K Tamura, M Kawasaki, H Koinuma

APPLIED PHYSICS LETTERS   79 ( 9 )   1282 - 1284   2001.8

Parallel integration and characterization of nanoscaled epitaxial lattices by concurrent molecular layer epitaxy and diffractometry International journal

T Ohnishi, D Komiyama, T Koida, S Ohashi, C Stauter, H Koinuma, A Ohtomo, M Lippmaa, N Nakagawa, M Kawasaki, T Kikuchi, K Omote

APPLIED PHYSICS LETTERS   79 ( 4 )   536 - 538   2001.7

Biexciton emission from ZnO/Zn0.74Mg0.26O multiquantum wells International journal

HD Sun, T Makino, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

APPLIED PHYSICS LETTERS   78 ( 22 )   3385 - 3387   2001.5

Temperature dependence of near ultraviolet photoluminescence in ZnO/(Mg, Zn)O multiple quantum wells International journal

T Makino, NT Tuan, HD Sun, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, T Suemoto, H Akiyama, M Baba, S Saito, T Tomita, H Koinuma

APPLIED PHYSICS LETTERS   78 ( 14 )   1979 - 1981   2001.4

Temperature dependence of excitonic absorption spectra in ZnO/Zn0.88Mg0.12O multiquantum wells grown on lattice-matched substrates International journal

HD Sun, T Makino, NT Tuan, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

APPLIED PHYSICS LETTERS   78 ( 17 )   2464 - 2466   2001.4

Band gap engineering based on MgxZn1-xO and CdyZn1-yO ternary alloy films International journal

T Makino, Y Segawa, M Kawasaki, A Ohtomo, R Shiroki, K Tamura, T Yasuda, H Koinuma

APPLIED PHYSICS LETTERS   78 ( 9 )   1237 - 1239   2001.2

Well-width dependence of exciton-phonon coupling strength in ZnO/(Mg,Zn)O multiple quantum wells grown by combinatorial laser molecular-beam epitaxy

T Makino, HD Sun, TT Nguyen, Y Segawa, CH Chia, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

COMBINATORIAL AND COMPOSITION SPREAD TECHNIQUES IN MATERIALS AND DEVICE DEVELOPMENT II   4281   59 - 67   2001

Stimulated emission spectra from ZnO/Zn1-xMgxO multi-quantum wells

HD Sun, T Makino, NT Tuan, Y Segawa, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II   87   1555 - 1556   2001

Optically pumped stimulated emission in ZnO/ZnMgO multiple quantum wells prepared by combinatorial techniques

HD Sun, T Makino, NT Tuan, Y Segawa, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

COMBINATORIAL AND COMPOSITION SPREAD TECHNIQUES IN MATERIALS AND DEVICE DEVELOPMENT II   4281   68 - 76   2001

T

Proceedings of 25th International conference on Physics of Semiconductors   2   1551 - 1551   2001

High Throughput Research on ZnO Films and Superlattices by Combinatorial Methodology

M. Kawasaki, A. Ohtomo, K. Tamura, T. Fukumura, Zhengwu Ji, H. Kimura, A. Tsukazaki, H. Saito, C. Hirose, Y. Matsumoto, H. Koinuma, T, Makino H, D. Sun, Y. Se

13th Int’l Conf. on Crystal Growth in Conjunction with 11th Int’l Conf. on Vapor Growth and Epitaxy   590   2001

Time-resolved luminescence spectra in (Cd,Zn)O/(Mg,Zn)O multi-quantum wells on lattice-matched substrates

T Makino, NT Tuan, Y Segawa, CH Chia, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II   87   1551 - 1552   2001

Exciton localization in (Cd,Zn)O epilayers and (Cd,Zn)O/(Mg,Zn)O multi-quantum wells on lattice-matched substrates Reviewed

T Makino, NT Tuan, CH Chia, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

PROCEEDINGS OF THE 2000 INTERNATIONAL CONFERENCE ON EXCITONIC PROCESSES IN CONDENSED MATTER   285 - 288   2001

Stimulated emission induced by exciton-exciton scattering in ZnO/ZnMgO multiquantum wells up to room temperature International journal

HD Sun, T Makino, NT Tuan, Y Segawa, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

APPLIED PHYSICS LETTERS   77 ( 26 )   4250 - 4252   2000.12

Novel semiconductor technologies of ZnO films towards ultraviolet LEDs and invisible FETs International journal

A Ohtomo, M Kawasaki

IEICE TRANSACTIONS ON ELECTRONICS   E83C ( 10 )   1614 - 1617   2000.10

Room-temperature stimulated emission of excitons in ZnO/(Mg, Zn)O superlattices International journal

A Ohtomo, K Tamura, M Kawasaki, T Makino, Y Segawa, ZK Tang, GKL Wong, Y Matsumoto, H Koinuma

APPLIED PHYSICS LETTERS   77 ( 14 )   2204 - 2206   2000.10

In-plane anisotropic strain of ZnO closely packed microcrystallites grown on tilted (0001) sapphire International journal

F Siah, Z Yang, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, H Koinuma, Y Segawa

JOURNAL OF APPLIED PHYSICS   88 ( 5 )   2480 - 2483   2000.9

Radiative and nonradiative recombination processes in lattice-matched (Cd,Zn)O/(Mg,Zn)O multiquantum wells International journal

T Makino, CH Chia, NT Tuan, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

APPLIED PHYSICS LETTERS   77 ( 11 )   1632 - 1634   2000.9

Erratum: Exciton spectra of ZnO epitaxial layers on lattice-matched substrates grown with laser-molecular-beam epitaxy (Appl. Phys. Lett. (2000) 76 (3549) (10.1063/1.126703)) Reviewed

T. Makino, C. H. Chia, N. T. Tuan, Y. Segawa, M. Kawasaki, A. Ohtomo, K. Tamura, H. Koinuma

Applied Physics Letters   77 ( 9 )   1405   2000.8

C-V Characteristics of ZnO Thin-Film Field Effect Transistor Structures Formed on Glass Substrates

OHMAKI Y., KISHIMOTO S., OHNO Y., MATSUKURA F., OHNO H., SAIKUSA K., AITA T., OHTOMO A., KAWASAKI M.

2000   132 - 133   2000.8

Exciton spectra of ZnO epitaxial layers on lattice-matched substrates grown with laser-molecular-beam epitaxy (vol 76, pg 3549, 2000

T Makino, CH Chia, NT Tuan, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

APPLIED PHYSICS LETTERS   77 ( 9 )   1405 - 1405   2000.8

Room-temperature luminescence of excitons in ZnO/(Mg, Zn)O multiple quantum wells on lattice-matched substrates International journal

T Makino, CH Chia, NT Tuan, HD Sun, Y Segawa, M Kawasaki, A Ohtomo, K Tamura, H Koinuma

APPLIED PHYSICS LETTERS   77 ( 7 )   975 - 977   2000.8

Growth mode and surface morphology of a GaN film deposited along the N-face polar direction on c-plane sapphire substrate International journal

M Sumiya, K Yoshimura, T Ito, K Ohtsuka, S Fuke, K Mizuno, M Yoshimoto, H Koinuma, A Ohtomo, M Kawasaki

JOURNAL OF APPLIED PHYSICS   88 ( 2 )   1158 - 1165   2000.7

Optical spectra in ZnO thin films on lattice-matched substrates grown with laser-MBE method

T. Makino, G. Isoya, Y. Segawa, C. H. Chia, T. Yasuda, M. Kawasaki, A. Ohtomo, K. Tamura, H. Koinuma

Journal of Crystal Growth   214   289 - 293   2000.6

Combinatorial laser MBE synthesis of 3d ion doped epitaxial ZnO thin films International journal

ZW Jin, M Murakami, T Fukumura, Y Matsumoto, A Ohtomo, M Kawasaki, H Koinuma

JOURNAL OF CRYSTAL GROWTH   214   55 - 58   2000.6

Lateral grain size and electron mobility in ZnO epitaxial films grown on sapphire substrates International journal

A Ohtomo, H Kimura, K Saito, T Makino, Y Segawa, H Koinuma, M Kawasaki

JOURNAL OF CRYSTAL GROWTH   214   284 - 288   2000.6

Epitaxial growth of ZnO films on lattice-matched ScAlMgO4(0001) substrates International journal

K Tamura, A Ohtomo, K Saikusa, Y Osaka, T Makino, Y Segawa, M Sumiya, S Fuke, H Koinuma, M Kawasaki

JOURNAL OF CRYSTAL GROWTH   214   59 - 62   2000.6

Concept and development of combinatorial laser MBE for oxide electronics International journal

H Koinuma, M Kawasaki, T Itoh, A Ohtomo, M Murakami, ZW Jin, Y Matsumoto

PHYSICA C   335 ( 1-4 )   245 - 250   2000.6

Temperature dependence of four-wave-mixing spectra in ZnO thin films on sapphire substrates grown with laser MBE International journal

T Makino, NT Tuan, Y Segawa, CH Chia, A Ohtomo, M Kawasaki, H Koinuma

JOURNAL OF LUMINESCENCE   87-9   210 - 212   2000.5

Optical and photoelectrical properties of oriented ZnO films International journal

JW Tomm, B Ullrich, XG Qiu, Y Segawa, A Ohtomo, M Kawasaki, H Koinuma

JOURNAL OF APPLIED PHYSICS   87 ( 4 )   1844 - 1848   2000.2

A convergent beam, parallel detection X-ray diffraction system for characterizing combinatorial epitaxial thin films

K Omote, T Kikuchi, J Harada, M Kawasaki, A Ohtomo, M Ohtani, T Ohnishi, D Komiyama, H Koinuma

COMBINATORIAL AND COMPOSITION SPREAD TECHNIQUES IN MATERIALS AND DEVICE DEVELOPMENT   3941   84 - 91   2000

Exciton spectra of ZnO thin films on lattice-matched substrates grown with laser MBE method

MAKINO T, CHIA C H, TUAN N T, SEGAWA Y, KAWASAKI M, OHTOMO A, TAMURA K, KOINUMA H

Appl. Phys. Lett.   76 ( 24 )   3549 - 3551   2000

Investigation of ZnO/sapphire interface and formation of ZnO nanocrystalline by laser MBE

I. Ohkubo, Y. Matsumoto, A. Ohtomo, T. Ohnishi, A. Tsukazaki, M. Lippmaa, H. Koinuma, M. Kawasaki

Applied Surface Science   159   514 - 519   2000

The use of parallel synthesis and characterization techniques in thin film growth dynamics studies

Proceedings of 4th Symposium on Atomic-scale Surface and Interface Dynamics   4   431 - 436   2000

Optical characterization for combinatorial systems based on semiconductor ZnO

T Makino, G Isoya, Y Segawa, CH Chia, T Yasuda, M Kawasaki, A Ohtomo, K Tamura, Y Matsumoto, H Koinuma

COMBINATORIAL AND COMPOSITION SPREAD TECHNIQUES IN MATERIALS AND DEVICE DEVELOPMENT   3941   28 - 35   2000

High throughput optimizations of alloy and doped films based on ZnO and parallel synthesis of ZnO/MgxZn1-xO quantum wells using combinatorial laser MBE towards ultraviolet laser

A Ohtomo, T Makino, K Tamura, Y Matsumoto, Y Segawa, ZK Tang, GKL Wong, H Koinuma, M Kawasaki

COMBINATORIAL AND COMPOSITION SPREAD TECHNIQUES IN MATERIALS AND DEVICE DEVELOPMENT   3941   70 - 81   2000

Can ZnO eat market in optoelectronic applications?

KAWASAKI M., TAMURA K., SAIKUSA K., AITA T., TSUKAZAKI A., OHTOMO A., JIN Z. G., MATSUMOTO Y., FUKUMURA T., KOINUMA H., OHMAKI Y., KISHIMOTO S., OHNO Y., MATSUKURA F., OHNO H., MAKINO T., TUAN N. T., SUN H. D., CHIA C. H., SEGAWA Y., TANG Z. K., WANG G. K. L.

Extended abstracts of 2000 International Conference on Solid State Devices and Materials   ,128-129   128 - 129   2000

Exploration of new properties of oxides by the growth control using pulsed laser epitaxy

H Koinuma, T Koida, D Komiyama, M Lippmaa, A Ohtomo, M Kawasaki

MATERIALS SCIENCE OF NOVEL OXIDE-BASED ELECTRONICS   623   329 - 340   2000

Thermal stability of supersaturated MgxZn1-xO alloy films and MgxZn1-xO/ZnO heterointerfaces International journal

A Ohtomo, R Shiroki, Ohkubo, I, H Koinuma, M Kawasaki

APPLIED PHYSICS LETTERS   75 ( 26 )   4088 - 4090   1999.12

In-plane and polar orientations of ZnO thin films grown on atomically flat sapphire International journal

Ohkubo, I, A Ohtomo, T Ohnishi, Y Mastumoto, H Koinuma, M Kawasaki

SURFACE SCIENCE   443 ( 1-2 )   L1043 - L1048   1999.12

An oxide-diluted magnetic semiconductor: Mn-doped ZnO International journal

T Fukumura, ZW Jin, A Ohtomo, H Koinuma, M Kawasaki

APPLIED PHYSICS LETTERS   75 ( 21 )   3366 - 3368   1999.11

Single crystalline ZnO films grown on lattice-matched ScAlMgO4(0001) substrates International journal

A Ohtomo, K Tamura, K Saikusa, K Takahashi, T Makino, Y Segawa, H Koinuma, M Kawasaki

APPLIED PHYSICS LETTERS   75 ( 17 )   2635 - 2637   1999.10

Structure and optical properties of ZnO/Mg0.2Zn0.8O superlattices International journal

A Ohtomo, M Kawasaki, Ohkubo, I, H Koinuma, T Yasuda, Y Segawa

APPLIED PHYSICS LETTERS   75 ( 7 )   980 - 982   1999.8

Combinatorial laser molecular beam epitaxy (MBE) growth of Mg-Zn-O alloy for band gap engineering International journal

Y Matsumoto, M Murakami, ZW Jin, A Ohtomo, M Lippmaa, M Kawasaki, H Koinuma

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS   38 ( 6AB )   L603 - L605   1999.6

An efficient way of doping experiments: Combinatorial laser MBE synthesis of epitaxial ZnO thin film doped with Sc, Ti, V, Cr, Mn, Fe, Co, Ni, and Cu

Extended Abstracts of 5th Symposium on the Physics and Application of Spin-related Phenomena in Semiconductors   ,46-49   1999

ZnMnO as novel diluted magnetic semiconductor system

Proceedings of 3rd Symposium on Atomic-scale Surface and Interface Dynamics   3   157 - 160   1999

Epitaxial growth of single-crystalline ZnO films towards novel transparent opt-electronics

Proceedings of 3rd Symposium on Atomic-scale Surface and Interface Dynamics   3   147 - 150   1999

Control of the polarity and surface morphology of GaN films deposited on C-plane sapphire

M Sumiya, T Ohnishi, M Tanaka, A Ohtomo, M Kawasaki, M Yoshimoto, H Koinuma, K Ohtsuka, S Fuke

MRS INTERNET JOURNAL OF NITRIDE SEMICONDUCTOR RESEARCH   4   U642-U649   1999

ZnO ultraviolet lasers

Technical Information Center,Material Integration   12 ( 12 )   9 - 14   1999

ZnO/Mg_xZn_1-xO quantum structures

Extended Abstracts of 1st international Workshop on ZnO   ,17-17   1999

GaN growth on ozonized sapphire(0001) substrates by MOVPE International journal

T Honda, A Inoue, M Mori, T Shirasawa, N Mochida, K Saotome, T Sakaguchi, A Ohtomo, M Kawasaki, H Koinuma, F Koyama, K Iga

JOURNAL OF CRYSTAL GROWTH   195 ( 1-4 )   319 - 322   1998.12

Atom technology for Josephson tunnel junctions: SrTiO3 substrate surface International journal

M Lippmaa, K Takahashi, A Ohtomo, S Ohashi, T Ohnishi, N Nakagawa, T Sato, M Iwatsuki, H Koinuma, M Kawasaki

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   56 ( 2-3 )   111 - 116   1998.11

Coaxial impact-collision ion scattering spectroscopy analysis of ZnO thin films and single crystals International journal

T Ohnishi, A Ohtomo, Ohkuboa, I, M Kawasaki, M Yoshimoto, H Koinuma

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   56 ( 2-3 )   256 - 262   1998.11

Fabrication of alloys and superlattices based on ZnO towards ultraviolet laser International journal

A Ohtomo, M Kawasaki, Y Sakurai, Ohkubo, I, R Shiroki, Y Yoshida, T Yasuda, Y Segawa, H Koinuma

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   56 ( 2-3 )   263 - 266   1998.11

Excitonic ultraviolet laser emission at room temperature from naturally made cavity in ZnO nanocrystal thin films International journal

M Kawasaki, A Ohtomo, Ohkubo, I, H Koinuma, ZK Tang, P Yu, GKL Wong, BP Zhang, Y Segawa

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   56 ( 2-3 )   239 - 245   1998.11

Observation of SrTiO(3) step edge dynamics by real-time high-temperature STM International journal

M Lippmaa, M Kawasaki, A Ohtomo, T Sato, M Iwatsuki, H Koinuma

APPLIED SURFACE SCIENCE   130   582 - 586   1998.6

Room-temperature ultraviolet laser emission from self-assembled ZnO microcrystallite thin films International journal

ZK Tang, GKL Wong, P Yu, M Kawasaki, A Ohtomo, H Koinuma, Y Segawa

APPLIED PHYSICS LETTERS   72 ( 25 )   3270 - 3272   1998.6

Room temperature ultraviolet laser emission from ZnO nanocrystal thin films grown by laser MBE International journal

A Ohtomo, M Kawasaki, Y Sakurai, Y Yoshida, H Koinuma, P Yu, ZK Tang, GKL Wong, Y Segawa

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   54 ( 1-2 )   24 - 28   1998.6

Dimension controlled epitaxy of quantum functional oxide thin films by pulsed-laser processes International journal

H Koinuma, XG Qiu, R Tsuchiya, N Kanda, J Nishino, A Ohtomo, M Kawasaki

APPLIED SURFACE SCIENCE   127   403 - 409   1998.5

MgxZn1-xO as a II-VI widegap semiconductor alloy International journal

A Ohtomo, M Kawasaki, T Koida, K Masubuchi, H Koinuma, Y Sakurai, Y Yoshida, T Yasuda, Y Segawa

APPLIED PHYSICS LETTERS   72 ( 19 )   2466 - 2468   1998.5

Room-temperature gain spectra and lasing in microcrystalline ZnO thin films International journal

P Yu, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, H Koinuma, Y Segawa

JOURNAL OF CRYSTAL GROWTH   184   601 - 604   1998.2

Determination of surface polarity of c-axis oriented ZnO films by coaxial impact-collision ion scattering spectroscopy

T Ohnishi, A Ohtomo, M Kawasaki, K Takahashi, M Yoshimoto, H Koinuma

APPLIED PHYSICS LETTERS   72 ( 7 )   824 - 826   1998.2

Fabrication of oxide based ultraviolet laser

Maruzen,Parity   13 ( 1 )   48 - 52   1998

Romm temperature excitonic laser emission form ZnO nanocrystals

Agne Gijyutsu Center,Solid State Physics   33 ( 1 )   59 - 64   1998

ZnO alloy system and quantum structures towards ultraviolet laser

Proceedings of 2nd International Symposium on Blue Laser and Light Emitting Diodes   ,711-714   1998

Excitonic ultraviolet laser emission at room temperature from naturally made cavity in ZnO nanocrystalline thin films

Proceedings of 2nd Symposium on Atomic-scale Surface and Interface Dynamics   2   225 - 231   1998

Excitonic gain and laser emission in ZnO microcrystallites at room temperature International journal

P Yu, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, H Koinuma, Y Segawa

PHYSICS OF LOW-DIMENSIONAL STRUCTURES   1-2   243 - 251   1998

Ultraviolet excitonic laser action at room temperature in ZnO nanocrystalline epitaxial films International journal

M Kawasaki, A Ohtomo, H Koinuma, Y Sakurai, Y Yoshida, ZK Tang, P Yu, GKL Wang, Y Segawa

SILICON CARBIDE, III-NITRIDES AND RELATED MATERIALS, PTS 1 AND 2   264-2 ( 268 )   1459 - 1462   1998

ZnO quantum structures towards UV diode lasers

Extended Abstracts of 1998 International Conference on Sold State Devices and Materials   356 ( 357 )   1998

Double heterostructure based on ZnO and Mg_xZn_1-xO International journal

A. Ohtomo, M. Kawasaki, T. Koida, H. Koinuma, Y. Sakurai, Y. Yoshida, M. Sumiya, S. Fuke, T. Yasuda, Y. Segawa

Materials Science Forum, Silicon Carbide, III-Nitrides and Related Materials   264-268   1463 - 1466   1998

A novel oxide DMS: Mn doped ZnO

Extended Abstracts of 4th Symposium on the Physics and Application of Spin-related Phenomena in Semiconductors   ,109-112   1998

A study of SrTiO₃ surface dynamics during wet etching and high-temperature annealing

Proceedings of 2nd Symposium on Atomic-scale Surface and Interface Dynamics   2   205 - 210   1998

Alloys and superlattices of ZnO based oxide semiconductors towards ultraviolet emitting devices

Extended Abstracts of the 17th Electric Materials Symposium   ,79-80   1998

Ultraviolet spontaneous and stimulated emissions from ZnO microcrystallite thin films at room temperature International journal

P Zu, ZK Tang, GKL Wong, M Kawasaki, A Ohtomo, H Koinuma, Y Segawa

SOLID STATE COMMUNICATIONS   103 ( 8 )   459 - 463   1997.8

Growth of ZnO thin film by laser MBE: Lasing of exciton at room temperature International journal

Y Segawa, A Ohtomo, M Kawasaki, H Koinuma, ZK Tang, P Yu, GKL Wong

PHYSICA STATUS SOLIDI B-BASIC RESEARCH   202 ( 2 )   669 - 672   1997.8

Construction and superfunction of metal-oxide nanostructures and interfaces International journal

M Kawasaki, R Tsuchiya, N Kanda, A Ohtomo, H Koinuma

SCIENCE REPORTS OF THE RESEARCH INSTITUTES TOHOKU UNIVERSITY SERIES A-PHYSICS CHEMISTRY AND METALLURGY   44 ( 2 )   207 - 210   1997.3

Laser MBE of ceramic thin films for future electronics International journal

H Koinuma, N Kanda, J Nishino, A Ohtomo, H Kubota, M Kawasaki, M Yoshimoto

APPLIED SURFACE SCIENCE   109   514 - 519   1997.2

Study of SrTiO_3_ surface dynamics by real-time STM at high temperatures

Mikk Lippmaa, Akira Ohtomo, Masashi Kawasaki

1997.1

ZnOの量子構造の形成と室温レーザー発振

川崎 雅司, 大友 明, 鯉沼 秀臣, 湯 子康, P. Yu, G. K. L. Wong, 瀬川 勇三朗

日本学術振興会第162委員会 第6回研究会資料   1997.1

表面界面・ハイヤーオーダーエピタキシ

大友 明, 川崎 雅司

1997.1

Oxide quantum structures for future electro-photonics

M Kawasaki, A Ohtomo, R Tsuchiya, J Nishino, H Koinuma

EPITAXIAL OXIDE THIN FILMS III   474   303 - 312   1997

Transmission electron microscopy study of room temperature lasing epitaxial ZnO films on sapphire

Material Research Society Symposium Proceedings   482   423   1997

Room temperature ultraviolet laser emission from microstructured ZnO thin film

Nonlinear Optics   18   355 - 362   1997

Atomic control of SrTiO3 surface for perfect epitaxy of perovskite oxides International journal

M Kawasaki, A Ohtomo, T Arakane, K Takahashi, M Yoshimoto, H Koinuma

APPLIED SURFACE SCIENCE   107   102 - 106   1996.11

Advanced processing and characterization of SrTiO3 single crystals and bicrystals for high-T-c superconducting film substrate International journal

K Takahashi, A Ohtomo, M Kawasaki, H Koinuma

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   41 ( 1 )   152 - 156   1996.10

Room temperature luminescence and stimulated UV emission from ZnO

Proceedings of The 23rd International Conference on The Physics of Semiconductors   ,1453-1456   1996

人工格子が切り拓く酸化物エレクトロニクス

大友明

社団法人 蔵前工業会  2011.11 

Local Crystal Structure Analysis for La-doped SrTiO_3 Super Lattice Thin Film based on STEM and EELS

SAITO Mitsuhiro, TSUKIMOTO Susumu, WANG Zhongchang, IKUHARA Yuichi, MIZOGUCHI Teruyasu, OKUDE Masaki, OHOTOMO Akira, KAWASAKI Masashi, KITA Takuji

The Japan Institute of Metals and Materials  2009.12 

Optical and electrical properties of ZnO and related hetero-structures

Vietnam Academic Press Proceedings of the International Workshop on Photonics and Applications (Advances in Optics, Photonics, Spectroscopy & Applications V, edited by P. Brechignac, K. Hakuta, H. Lim, N.V. Hieu, N.D. Hung and V. A. Orlovich)  2009 

Optical and electrical properties of ZnO and related hetero-structures

Vietnam Academic Press Proceedings of the International Workshop on Photonics and Applications (Advances in Optics, Photonics, Spectroscopy & Applications V, edited by P. Brechignac, K. Hakuta, H. Lim, N.V. Hieu, N.D. Hung and V. A. Orlovich)  2009 

Epitaxial growth and transport properties of high-mobility ZnO-based heterostructures

Springer Advances in Materials Research  2008 

Engineering of ZnO based quantum well structures towards a solid state lighting device

JFE 21st Century Foundation,Proceedings of Academic Research in 2007 founded by JFE 21st Century Foundation  2008 

Epitaxial growth and transport properties of high-mobility ZnO-based heterostructures

Springer Advances in Materials Research  2008 

固体照明光源に最適化したZnO量子井戸の設計と作製

財団法人JFE21世紀財団 財団法人JFE21世紀財団2007年度大学研究助成技術研究報告書  2008 

Evaluation methods for heterostructures

Akira Ohtomo

Nanoparticle Technology Handbook  2007.10 

未来は若い探究心の中から生まれてくる -最先端科学の荒海を風にのって渡っていく-

大友 明

東北大学（100周年記念出版）  2007.8 

Invisible electronics now in sight

2007 

The future springs from inquiring young minds - Riding on the wind across the rough seas of leading-edge science -

Tohoku University,Tohoku University  2007 

The future springs from inquiring young minds -Riding on the wind across the rough seas of leading-edge science-

Tohoku University Tohoku University  2007 

The future springs from inquiring young minds -Riding on the wind across the rough seas of leading-edge science-

Tohoku University Tohoku University  2007 

Wide bandgap semiconductors and related optoelectronic devices

Springer-Verlag GmbH  2007 

Wide bandgap semiconductors and related optoelectronic devices

Springer-Verlag GmbH  2007