国立研究開発法人科学技術振興機構

2003年 - 2007年

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年 - 2007年

東北大学金属材料研究所   助手

2002年6月 - 2007年3月

COMET, National Institute for Research in Inorganic Materials

2002年 - 2006年

物質・材料研究機構COMETプロジェクト

2002年 - 2006年

ルーセントテクノロジー社ベル研究所   物理部門   博士研究員

2000年4月 - 2002年5月

Lucent Technologies, Bell Laboratories

2000年 - 2002年

Materials Research Society

Surface Science Society of Japan

強相関遷移金属酸化物の電気化学的な電子状態の変調 査読

大友 明, 相馬 拓人

応用物理   Vol. 91 ( No. 6 )   340 - 345   2022年6月

Epitaxial growth of MoO3 polymorphs and impacts of Li-ion electrochemical reactions on their structural and electronic properties 査読 国際誌

Shuxin Zhang, Tatsuya Yajima, Takuto Soma, Akira Ohtomo

Applied Physics Express   Volume 15 ( Number 5 )   055505   2022年5月

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 国際誌

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

Physical Review B   105 ( 10 )   2022年3月

Enhancement of transparency in epitaxially-grown p-type SnO films by surface-passivation treatment in a Na2S aqueous solution 査読 国際誌

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

Japanese Journal of Applied Physics   61   050903   2022年2月

Heavy-fermion metallic state and Mott transition induced by Li-ion intercalation in LiV2O4 epitaxial films 査読 国際誌

矢島 達也, 相馬 拓人, 吉松 公平, 栗田 伸之, 渡邊 正理, 大友 明

Physical Review B   104 ( 24 )   245104   2021年12月

Optical properties of LiNbO2 thin films 国際誌

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

Physica B: Condensed Matter   621   413259 - 413259   2021年11月

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 国際誌

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

Crystal Growth and Design   21 ( 5 )   2844 - 2849   2021年5月

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年3月

Superconducting Dome Underlying Bipolaronic Insulating State in Charge-doped Ti4O7 Epitaxial Films 査読 国際誌

Takuto Soma, Tomohiro Kobayashi, Kohei Yoshimatsu, Akira Ohtomo

Journal of the Physical Society of Japan   Vol. 90 ( No. 2 )   023705 - 023705   2021年1月

Epitaxial Thin Film Growth of Europium Dihydride 査読 国際誌

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年9月

p-type transparent superconductivity in a layered oxide 査読 国際誌

Takuto Soma, Kohei Yoshimatsu, Akira Ohtomo

Science Advances   6 ( 29 )   eabb8570 - eabb8570   2020年7月

Optical and structural investigations on titanium oxynitride films for visible-UV photocatalytic applications 国際誌

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

JOURNAL OF APPLIED PHYSICS   127 ( 13 )   6   2020年4月

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年3月

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

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

Physical Review B   Vol. 100 ( Issue 21 )   9   2019年12月

Magnetic and electronic properties of B -site-ordered double-perovskite oxide La2CrMnO6 thin films 査読 国際誌

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年6月

Electronic properties across metal-insulator transition in β-pyrochlore-type CsW2O6 epitaxial films 査読 国際誌

相馬 拓人, 吉松 公平, 堀場 弘司, 組頭 広志, 大友 明

Vol. 2 ( 11 )   8   2018年11月

Large anisotropy in conductivity of Ti2O3 films 査読 国際誌

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

APL Materials   6   101101   2018年10月

Band alignment at β-(AlxGa1−x)2O3/β-Ga2O3 (100) interface fabricated by pulsed-laser deposition 査読 国際誌

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

Applied Physics Letters   112 ( 23 )   2018年6月

Superconductivity in Ti₄O₇ and γ-Ti₃O₅ films 査読 国際誌

K. Yoshimatsu, Osami Sakata, A. Ohtomo

Scientific Reports   7   12544   2017年10月

Epitaxial structure and electronic property of?β-Ga₂O₃?films grown on MgO (100) substrates by pulsed-laser deposition 国際誌

Ryo Wakabayashi, K. Yoshimatsu, Mai Hattori, A. Ohtomo

111 ( 16 )   162101   2017年10月

TiO₂(100)面上のCaFe₂O₄薄膜のエピタキシャル成長 査読

西山奈菜, 増子尚徳, 吉松 公平, 堀場弘司, 組頭 広志, 大友 明

Vol. 638   406 - 409   2017年9月

Hetero-epitaxial growth control of single-crystalline anatase TiO2 nanosheets predominantly exposing the {001} facet on oriented crystalline substrates 査読 国際誌

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

CRYSTENGCOMM   19 ( 32 )   4734 - 4741   2017年8月

Effects of phase fraction on superconductivity of low-valence eutectic titanate films 国際誌

Hikaru Kurokawa, Kohei Yoshimatsu, Osami Sakata, Akira Ohtomo

JOURNAL OF APPLIED PHYSICS   122 ( 5 )   2017年8月

Electronic Structures and Photoanodic Properties of Ilmenite-type MTiO3 Epitaxial Films (M = Mn, Fe, Co, Ni) 査読 国際誌

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

JOURNAL OF PHYSICAL CHEMISTRY C   121 ( 34 )   18717 - 18724   2017年8月

Microwave Effects on Co-Pi Co-catalysts Deposited on α-Fe₂O₃ for Application to Photocatalytic Oxygen Evolution 査読 国際誌

Masato Maitani, Takuya Yamada, Hisanori Mashiko, Kohei Yoshimatsu, Takayoshi OSHIMA, A. Ohtomo, Yuji Wada

9 ( 12 )   10349 - 10354   2017年3月

Formation of indium-tin oxide ohmic contacts for beta-Ga2O3 査読 国際誌

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年12月

Epitaxial growth and electric properties of gamma-Al2O3(110) films on beta-Ga2O3(010) substrates 査読 国際誌

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年12月

Epitaxial synthesis and physical properties of double-perovskite oxide Sr₂CoRuO₆ thin films 査読 国際誌

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

Journal of Physics: Condensed Matter   Vol. 28 ( No. 48 )   2016年9月

Impact of built-in potential across LaFeO3/SrTiO3 heterojunctions on photocatalytic activity 査読 国際誌

Kentarou Nakamura, Hisanori Mashiko, Kohei Yoshimatsu, Akira Ohtomo

APPLIED PHYSICS LETTERS   108 ( 21 )   211605   2016年5月

Strain-induced metal-insulator transition in t(2g) electron system of perovskite titanate Sm0.5Ca0.5TiO3 films 査読 国際誌

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

PHYSICAL REVIEW B   93 ( 19 )   195159   2016年5月

Fabrication and Characterization of Semiconductor Photoelectrodes with Orientation-Controlled α-Fe₂O₃ Thin Films 査読 国際誌

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

Vol. 120 ( No. 5 )   2747–2752   2016年1月

Insulator to metal transition of WO₃ epitaxial films induced by electrochemical Li-ion intercalaion 査読 国際誌

K. Yoshimatsu, Takuto Soma, A. Ohtomo

Appl. Phys. Express   9 ( 7 )   75802 - 75802   2016年

Epitaxial growth of hexagonal tungsten bronze Cs_xWO₃ films in superconducting phase region exceeding bulk limit 査読 国際誌

Takuto Soma, K. Yoshimatsu, A. Ohtomo

Appl. Phys. Express   9 ( 7 )   75801 - 75801   2016年

Reversible superconductor-insulator transition in LiTi2O4 induced by Li-ion electrochemical reaction 査読 国際誌

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

SCIENTIFIC REPORTS   5 ( 16325 )   2015年11月

酸素ラジカル支援PLD法による β-(Al_xGa_1-x)₂O₃薄膜の作製 査読

若林 諒, 服部 真依, 大島 孝仁, 向井 章, 佐々木 公平, 増井 建和, 倉又 朗人, 山腰 茂伸, 吉松 公平, 大友 明

Vol. 424   77 - 79   2015年5月

Conducting Si-doped γ-Ga₂O₃ epitaxial films grown by pulsed-laser deposition 査読 国際誌

Takayoshi Oshima, Keitarou Matsuyama, Kohei Yoshimatsu, Akira Ohtomo

Journal of Crystal Growth   Volume 421   23 - 26   2015年4月

Pulsed-laser deposition of superconducting LiTi₂O₄ ultrathin films 査読 国際誌

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

Journal of Crystal Growth   Volume 419   153 - 157   2015年3月

Direct growth of metallic TiH2 thin films by pulsed laser deposition 査読 国際誌

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

APPLIED PHYSICS EXPRESS   8 ( 3 )   35801 - 35801   2015年3月

Synthesis and magnetic properties of double-perovskite oxide La2MnFeO6 thin films 査読 国際誌

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

PHYSICAL REVIEW B   91 ( 5 )   054421   2015年2月

Epitaxial growth of wide-band-gap ZnGa₂O₄ films by mist chemical vapor deposition 査読 国際誌

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

Journal of Crystal Growth   Volume 386   190 - 193   2014年1月

Surface and interface engineering of ZnO based heterostructures fabricated by pulsed-laser deposition 国際誌

A. Tsukazaki, A. Ohtomo, M. Kawasaki

Journal of Physics D: Applied Physics   Volume 47 ( Number 3 )   034003   2013年12月

Improved visible light driven photoelectrochemical properties of 3C-SiC semiconductor with Pt nanoparticles for hydrogen generation 査読 国際誌

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

APPLIED PHYSICS LETTERS   103 ( 21 )   213901 (5 pages)   2013年11月

beta-Ga2O3 Single Crystal as a Photoelectrode for Water Splitting 査読 国際誌

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年11月

Epitaxial Synthesis and Electronic Properties of Double-Perovskite Sr2TiRuO6 Films 査読 国際誌

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年10月

Formation of Semi-Insulating Layers on Semiconducting beta-Ga2O3 Single Crystals by Thermal Oxidation 査読 国際誌

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年5月

Spontaneous atomic ordering and magnetism in epitaxially stabilized double perovskites 査読 国際誌

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

Journal of Materials Research   Volume 28 ( 5 )   689 - 695   2013年1月

金属酸化物ヘテロ接合の界面伝導

大友 明

應用物理   81 ( 12 )   1002 - 1008   2012年12月

Spontaneous atomic ordering and magnetism in epitaxially stabilized double-perovskites 査読 国際誌

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年12月

Epitaxial growth of gamma-Ga2O3 films by mist chemical vapor deposition 査読 国際誌

Oshima Takayoshi, Nakazono Taishi, Mukai Akira, Ohtomo Akira

JOURNAL OF CRYSTAL GROWTH   359   60 - 63   2012年11月

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

Mashiko Hisanori, Oshima Takayoshi, Ohtomo Akira

JAPANESE JOURNAL OF APPLIED PHYSICS   51 ( 11 )   11PG11 - 11PG11-5   2012年11月

Band-gap narrowing in α-(Cr_xFe_1-x)₂O₃ solid-solution films 査読 国際誌

H. Mashiko, T. Oshima, A. Ohtomo

Applied Physics Letters   Vol. 99 ( 24 )   241904-1-3   2011年12月

Magnetic properties of Sr2FeTaO6 double perovskite epitaxially grown by pulsed-laser deposition 国際誌

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

APPLIED PHYSICS LETTERS   99 ( 22 )   223101 - 223103   2011年11月

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

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年10月

Magnetic and electronic properties of ordered double-perovskite La2VMnO6 thin films 査読 国際誌

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年10月

Ferrimagnetism and spontaneous ordering of transition metals in double perovskite La₂CrFeO₆ films 査読 国際誌

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年8月

Improvement of Electron Mobility above 100,000 cm(2) V-1 s(-1) in MgxZn1-xO/ZnO Heterostructures 査読 国際誌

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

JAPANESE JOURNAL OF APPLIED PHYSICS   50 ( 8 )   080215-1-3   2011年8月

Preparation of an Epitaxy-Ready Surface of a ZnO(0001) Substrate 査読 国際誌

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

APPLIED PHYSICS EXPRESS   4 ( 3 )   035701-1-3   2011年3月

Electric-field control of two-dimensional electrons in polymer-gated oxide semiconductor heterostructures 査読 国際誌

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年12月

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

S. Chakraverty, A. Ohtomo, M. Kawasaki

APPLIED PHYSICS LETTERS   97 ( 24 )   243107 - 243109   2010年12月

Dimensionality-driven insulator–metal transition in A-site excess non-stoichiometric perovskites 査読 国際誌

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

Nature Communications   Vol. 1   106-1-7   2010年11月

Observation of the fractional quantum Hall effect in an oxide 査読 国際誌

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年10月

Nitrogen doped MgxZn_1-xO/ZnO single heterostructure ultraviolet light-emitting diodes on ZnO substrates 査読 国際誌

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年7月

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年7月

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

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年7月

Hydrogenation-Induced Surface Polarity Recognition and Proton Memory Behavior at Protic-Ionic-Liquid/Oxide Electric-Double-Layer Interfaces 査読 国際誌

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

Journal of the American Chemical Society   132 ( 19 )   6672 - 6678   2010年5月

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

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年4月

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

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年2月

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

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

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

Epitaxial Structure of (001) and (111)-Oriented Perovskite Ferrate Films Grown by Pulsed-Laser Deposition 国際誌

CHAKRAVERTY Suvankar, OHTOMO Akira, OKUDE Masaki, UENO Kazunori, KAWASAKI Masashi, KAWASAKI Masashi

Cryst. Growth Des.   10 ( 4 )   1725 - 1729   2010年

Excitonic characteristics in direct wide band-gap CuScO₂ epitaxial thin films 査読 国際誌

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

Appl. Phys. Lett.   95 ( 211908 )   1 - 3   2009年11月

Magneto-optical study of n-type modulation-doped ZnO/Mg_xZn_1-xO single quantum well structures 査読 国際誌

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年10月

Optical and magnetic properties of CuMnO2 epitaxial thin films with a delafossite-derivative structure 国際誌

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

APPLIED PHYSICS LETTERS   95 ( 3 )   032109-1-032109-3   2009年7月

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

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

ADVANCED FUNCTIONAL MATERIALS   19 ( 7 )   1046 - 1053   2009年4月

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年4月

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

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年2月

MgxZn1-xO-Based Schottky Photodiode for Highly Color-Selective Ultraviolet Light Detection 国際誌

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年12月

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

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年12月

Photoexcitation screening of the built-in electric field in ZnO single quantum wells 国際誌

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

APPLIED PHYSICS LETTERS   93 ( 12 )   121907-1-121907-3   2008年9月

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

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年9月

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

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年9月

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

Masaki Okude, Akira Ohtomo, Takuji Kita, Masashi Kawasaki

APPLIED PHYSICS EXPRESS   1 ( 8 )   081201-1-081201-3   2008年8月

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

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年6月

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

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年5月

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

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年5月

High-throughput screening for combinatorial thin-film library of thermoelectric materials 国際誌

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

JOURNAL OF COMBINATORIAL CHEMISTRY   10 ( 2 )   175 - 178   2008年3月

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年2月

ZnOヘテロ接合の表面・界面制御と量子伝導

大友 明, 塚崎 敦, 川崎 雅司

日本表面科学会 表面科学   29 ( 1 )   10 - 17   2008年

Atomic-layer growth control of perovskite oxide heterointerface

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

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年

Electric-field-induced superconductivity in an insulator 国際誌

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年

MgxZn1-xO epitaxial films grown on ZnO substrates by molecular beam epitaxy 国際誌

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年

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

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

1.Low-temperature field-effect and magnetotransport properties in a ZnO based heterostructure with atomic-layer-deposited gate dielectric 国際誌

Appl. Phys. Lett.   93 ( No. 24 )   241905-1-241905-3   2008年

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

A. Tsukazaki, A. Ohtomo, M. Kawasaki

FRONTIERS IN MATERIALS RESEARCH   10   77 - +   2008年

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年11月

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

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

APPLIED SURFACE SCIENCE   254 ( 3 )   777 - 780   2007年11月

Schottky contact on a ZnO (0001) single crystal with conducting polymer 国際誌

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年10月

Growth mode control of the free carrier density in SrTiO3-delta films 国際誌

A. Ohtomo, H. Y. Hwang

JOURNAL OF APPLIED PHYSICS   102 ( 8 )   83704-1-83704-6   2007年10月

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年7月

Invisible electronics now in sight

Akira Ohtomo

The Japan Journal   4 ( 3 )   27 - 27   2007年7月

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 国際誌

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年4月

Quantum hall effect in polar oxide heterostructures 国際誌

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

Science   315 ( 5817 )   1388 - 1391   2007年3月

ZnO/MgZnO界面における量子ホール効果

塚崎 敦, 大友 明, 北 智洋

アグネ技術センター 固体物理   42 ( 9 )   559 - 567   2007年

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年

Insulator-to-metal transition in ZnO by electric double layer gating 国際誌

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

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

Quantum Hall effect in ZnO based heterostructures 国際誌

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年

Nanoparticle technology handbook

Elsevier   2007年

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年8月

Photo-irresponsive thin-film transistor with MgxZn1-xO channel 国際誌

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年7月

Shifting donor-acceptor photoluminescence in N-doped ZnO 国際誌

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

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   75 ( 7 )   073701-1-073701-4   2006年7月

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年6月

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年5月

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年5月

High-mobility electronic transport in ZnO thin films 国際誌

A. Tsukazaki, A. Ohtomo, M. Kawasaki

Applied Physics Letters   88 ( 15 )   152106-1-152106-3   2006年4月

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

K Ueno, A Ohtomo, F Sato, M Kawasaki

PHYSICAL REVIEW B   73 ( 16 )   165103-1-165103-5   2006年4月

Monte Carlo simulation of localization dynamics of excitons in ZnO and CdZnO quantum well structures 国際誌

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

JOURNAL OF APPLIED PHYSICS   99 ( 6 )   066108-1-066108-3   2006年3月

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

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

APPLIED SURFACE SCIENCE   252 ( 7 )   2507 - 2511   2006年1月

Analysis on reflection spectra in strained ZnO thin films 国際誌

T Makino, Y Segawa, M Kawasaki, A Ohtomo

JOURNAL OF CRYSTAL GROWTH   287 ( 1 )   124 - 127   2006年1月

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年1月

Combinatorial synthesis and optical characterization of alloy and superlattice films based on SrTiO3 and LaAlO3 国際誌

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

APPLIED SURFACE SCIENCE   252 ( 7 )   2488 - 2492   2006年1月

Self-assembled ZnO nano-crystals and exciton lasing at room temperature 国際誌

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

JOURNAL OF CRYSTAL GROWTH   287 ( 1 )   169 - 179   2006年1月

Majority-carrier mobilities in undoped and n-type doped ZnO epitaxial layers 国際誌

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年

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年

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年

Spectral shape analysis of ultraviolet luminescence in n-type ZnO : Ga 国際誌

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年11月

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年10月

Free-carrier effects on zero- and one-phonon absorption onsets of n-type ZnO 国際誌

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年10月

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年9月

Electron transport in ZnO thin films 国際誌

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

APPLIED PHYSICS LETTERS   87 ( 2 )   022101-1-022101-3   2005年7月

Pulsed laser deposition of thin films and superlattices based on ZnO

Akira Ohtomo, Atsushi Tsukazaki

Semiconductor Science and Technology   20 ( 4 )   S1 - S12   2005年4月

Exciton-polariton spectra and limiting factors for the room-temperature photoluminescence efficiency in ZnO 国際誌

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年4月

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

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年2月

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年1月

バッファー層による酸化物ヘテロエピタキシーの格子不整合エンジニアリング(<小特集>Buffer層を中心としたエピタキシーの新展開)

川崎 雅司, 寺井 恒太, 塚崎 敦, 大西 剛, 大友 明, リプマー ミック

日本結晶成長学会誌   32 ( 2 )   74 - 81   2005年

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年

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

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年

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年

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年

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

TSUKAZAKI A, OHTOMO A, ONUMA T, MAKINO T, SUMIYA M, CHICHIBU S F, FUKE S, SEGAWA Y, KOINUMA H

Nature Mater.   4 ( 1 )   42 - 46   2005年

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年

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年

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

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

ADVANCED MATERIALS   16 ( 21 )   1887 - +   2004年11月

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

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

APPLIED PHYSICS LETTERS   85 ( 5 )   759 - 761   2004年8月

Atomic-scale imaging of nanoengineered oxygen vacancy profiles in SrTiO3 国際誌

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

NATURE   430 ( 7000 )   657 - 661   2004年8月

Controlled carrier generation at a polarity-discontinued perovskite heterointerface 国際誌

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年8月

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年5月

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

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

APPLIED PHYSICS LETTERS   84 ( 19 )   3858 - 3860   2004年5月

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年5月

High-mobility electrons in SrTiO3 heterostructures 国際誌

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

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES   22 ( 1-3 )   712 - 716   2004年4月

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

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

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES   21 ( 2-4 )   671 - 675   2004年3月

Modeling of grain boundary barrier modulation in ZnO invisible thin film transistors 国際誌

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年3月

Surface depletion in doped SrTiO3 thin films

A Ohtomo, HY Hwang

APPLIED PHYSICS LETTERS   84 ( 10 )   1716 - 1718   2004年3月

Second harmonic generation in self-assembled ZnO microcrystallite thin films 国際誌

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

THIN SOLID FILMS   450 ( 2 )   320 - 323   2004年3月

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

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

APPLIED SURFACE SCIENCE   223 ( 1-3 )   206 - 209   2004年2月

A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface 国際誌

A Ohtomo, HY Hwang

NATURE   427 ( 6973 )   423 - 426   2004年1月

Optical gain in self-assembled ZnO microcrysallite thin films 国際誌

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

JOURNAL OF CRYSTAL GROWTH   259 ( 3 )   286 - 290   2003年12月

Modeling and simulation of polycrystalline ZnO thin-film transistors 国際誌

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年12月

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

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年10月

Resonant exciton second-harmonic generation in self-assembled ZnO microcrystallite thin films 国際誌

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

JOURNAL OF PHYSICS-CONDENSED MATTER   15 ( 30 )   5191 - 5196   2003年8月

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

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

JOURNAL OF APPLIED PHYSICS   93 ( 10 )   5929 - 5933   2003年5月

High mobility thin film transistors with transparent ZnO channels 国際誌

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年4月

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年3月

Confinement-enhanced biexciton binding energy in ZnO/ZnMgO multiple quantum wells 国際誌

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

APPLIED PHYSICS LETTERS   82 ( 12 )   1848 - 1850   2003年3月

最近の研究から バンド絶縁体--モット絶縁体界面の電荷変調と金属伝導

大友 明

日本物理学会誌   58 ( 6 )   425 - 429   2003年

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

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

PHYSICAL REVIEW B   66 ( 23 )   233305-1-233305-3   2002年12月

Photoluminescence properties of ZnO epitaxial layers grown on lattice-matched ScAlMgO4 substrates 国際誌

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

JOURNAL OF APPLIED PHYSICS   92 ( 12 )   7157 - 7159   2002年12月

Effect of MgZnO-layer capping on optical properties of ZnO epitaxial layers 国際誌

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

APPLIED PHYSICS LETTERS   81 ( 12 )   2172 - 2174   2002年9月

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

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

APPLIED PHYSICS LETTERS   81 ( 13 )   2355 - 2357   2002年9月

Artificial charge-modulation in atomic-scale perovskite titanate superlattices 国際誌

A Ohtomo, DA Muller, JL Grazul, HY Hwang

NATURE   419 ( 6905 )   378 - 380   2002年9月

Epitaxial growth and electronic structure of LaTiOx films 国際誌

A Ohtomo, DA Muller, JL Grazul, HY Hwang

APPLIED PHYSICS LETTERS   80 ( 21 )   3922 - 3924   2002年5月

Phonon replicas in ZnO/ZnMgO multiquantum wells 国際誌

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

JOURNAL OF APPLIED PHYSICS   91 ( 10 )   6457 - 6460   2002年5月

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年4月

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年3月

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

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年3月

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年2月

Observation of biexciton emission in ZnO/ZnMgO multi-quantum wells 国際誌

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年1月

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

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年1月

Well-width dependence of radiative and nonradiative lifetimes in ZnO-based multiple quantum wells 国際誌

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年1月

High throughput x-ray diffractometer for combinatorial epitaxial thin films 国際誌

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年

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

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年12月

Concurrent x-ray diffractometer for high throughput structural diagnosis of epitaxial thin films 国際誌

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年11月

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

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

JOURNAL OF APPLIED PHYSICS   90 ( 7 )   3650 - 3652   2001年10月

Strain effects on exciton resonance energies of ZnO epitaxial layers 国際誌

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

APPLIED PHYSICS LETTERS   79 ( 9 )   1282 - 1284   2001年8月

Parallel integration and characterization of nanoscaled epitaxial lattices by concurrent molecular layer epitaxy and diffractometry 国際誌

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年7月

Biexciton emission from ZnO/Zn0.74Mg0.26O multiquantum wells 国際誌

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

APPLIED PHYSICS LETTERS   78 ( 22 )   3385 - 3387   2001年5月

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

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年4月

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

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

APPLIED PHYSICS LETTERS   78 ( 17 )   2464 - 2466   2001年4月

Band gap engineering based on MgxZn1-xO and CdyZn1-yO ternary alloy films 国際誌

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

APPLIED PHYSICS LETTERS   78 ( 9 )   1237 - 1239   2001年2月

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年

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年

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年

T

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

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年

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年

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

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年

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

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年12月

Novel semiconductor technologies of ZnO films towards ultraviolet LEDs and invisible FETs 国際誌

A Ohtomo, M Kawasaki

IEICE TRANSACTIONS ON ELECTRONICS   E83C ( 10 )   1614 - 1617   2000年10月

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

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年10月

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

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年9月

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

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

APPLIED PHYSICS LETTERS   77 ( 11 )   1632 - 1634   2000年9月

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)) 査読

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年8月

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.

Extended abstracts of the ... Conference on Solid State Devices and Materials   2000   132 - 133   2000年8月

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年8月

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

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年8月

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

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年7月

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年6月

Combinatorial laser MBE synthesis of 3d ion doped epitaxial ZnO thin films 国際誌

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

JOURNAL OF CRYSTAL GROWTH   214   55 - 58   2000年6月

Lateral grain size and electron mobility in ZnO epitaxial films grown on sapphire substrates 国際誌

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

JOURNAL OF CRYSTAL GROWTH   214   284 - 288   2000年6月

Epitaxial growth of ZnO films on lattice-matched ScAlMgO4(0001) substrates 国際誌

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年6月

Concept and development of combinatorial laser MBE for oxide electronics 国際誌

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

PHYSICA C   335 ( 1-4 )   245 - 250   2000年6月

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

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

JOURNAL OF LUMINESCENCE   87-9   210 - 212   2000年5月

Optical and photoelectrical properties of oriented ZnO films 国際誌

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

JOURNAL OF APPLIED PHYSICS   87 ( 4 )   1844 - 1848   2000年2月

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年

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年

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年

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年

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年

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年

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 the ... Conference on Solid State Devices and Materials   ,128-129   128 - 129   2000年

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年

Thermal stability of supersaturated MgxZn1-xO alloy films and MgxZn1-xO/ZnO heterointerfaces 国際誌

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

APPLIED PHYSICS LETTERS   75 ( 26 )   4088 - 4090   1999年12月

In-plane and polar orientations of ZnO thin films grown on atomically flat sapphire 国際誌

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

SURFACE SCIENCE   443 ( 1-2 )   L1043 - L1048   1999年12月

An oxide-diluted magnetic semiconductor: Mn-doped ZnO 国際誌

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

APPLIED PHYSICS LETTERS   75 ( 21 )   3366 - 3368   1999年11月

Single crystalline ZnO films grown on lattice-matched ScAlMgO4(0001) substrates 国際誌

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

APPLIED PHYSICS LETTERS   75 ( 17 )   2635 - 2637   1999年10月

Structure and optical properties of ZnO/Mg0.2Zn0.8O superlattices 国際誌

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

APPLIED PHYSICS LETTERS   75 ( 7 )   980 - 982   1999年8月

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

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年6月

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年

ZnMnO as novel diluted magnetic semiconductor system

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

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年

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年

ZnO ultraviolet lasers

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

ZnO/Mg_xZn_1-xO quantum structures

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

GaN growth on ozonized sapphire(0001) substrates by MOVPE 国際誌

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年12月

Atom technology for Josephson tunnel junctions: SrTiO3 substrate surface 国際誌

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年11月

Coaxial impact-collision ion scattering spectroscopy analysis of ZnO thin films and single crystals 国際誌

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年11月

Fabrication of alloys and superlattices based on ZnO towards ultraviolet laser 国際誌

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年11月

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

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年11月

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

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

APPLIED SURFACE SCIENCE   130   582 - 586   1998年6月

Room-temperature ultraviolet laser emission from self-assembled ZnO microcrystallite thin films 国際誌

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

APPLIED PHYSICS LETTERS   72 ( 25 )   3270 - 3272   1998年6月

Room temperature ultraviolet laser emission from ZnO nanocrystal thin films grown by laser MBE 国際誌

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年6月

Dimension controlled epitaxy of quantum functional oxide thin films by pulsed-laser processes 国際誌

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

APPLIED SURFACE SCIENCE   127   403 - 409   1998年5月

MgxZn1-xO as a II-VI widegap semiconductor alloy 国際誌

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年5月

Room-temperature gain spectra and lasing in microcrystalline ZnO thin films 国際誌

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

JOURNAL OF CRYSTAL GROWTH   184   601 - 604   1998年2月

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年2月

Fabrication of oxide based ultraviolet laser

Maruzen,Parity   13 ( 1 )   48 - 52   1998年

Romm temperature excitonic laser emission form ZnO nanocrystals

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

ZnO alloy system and quantum structures towards ultraviolet laser

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

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年

Excitonic gain and laser emission in ZnO microcrystallites at room temperature 国際誌

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

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

Ultraviolet excitonic laser action at room temperature in ZnO nanocrystalline epitaxial films 国際誌

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年

ZnO quantum structures towards UV diode lasers

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

Double heterostructure based on ZnO and Mg_xZn_1-xO 国際誌

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年

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年

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年

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

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

Ultraviolet spontaneous and stimulated emissions from ZnO microcrystallite thin films at room temperature 国際誌

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

SOLID STATE COMMUNICATIONS   103 ( 8 )   459 - 463   1997年8月

Growth of ZnO thin film by laser MBE: Lasing of exciton at room temperature 国際誌

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年8月

Construction and superfunction of metal-oxide nanostructures and interfaces 国際誌

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年3月

Laser MBE of ceramic thin films for future electronics 国際誌

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

APPLIED SURFACE SCIENCE   109   514 - 519   1997年2月

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

Mikk Lippmaa, Akira Ohtomo, Masashi Kawasaki

1997年1月

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年1月

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年1月

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年

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

Material Research Society Symposium Proceedings   482   423   1997年

Room temperature ultraviolet laser emission from microstructured ZnO thin film

Nonlinear Optics   18   355 - 362   1997年

Atomic control of SrTiO3 surface for perfect epitaxy of perovskite oxides 国際誌

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

APPLIED SURFACE SCIENCE   107   102 - 106   1996年11月

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

K Takahashi, A Ohtomo, M Kawasaki, H Koinuma

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY   41 ( 1 )   152 - 156   1996年10月

Room temperature luminescence and stimulated UV emission from ZnO

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

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年11月 

STEMによるLaドープSrTiO_3人工超格子薄膜の原子構造解析

斎藤 光浩, 着本 享, 王 中長, 幾原 雄一, 溝口 照康, 奥出 正樹, 大友 明, 川崎 雅司, 木太 拓志

The Japan Institute of Metals and Materials  2009年12月 

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年 

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年 

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

Springer Advances in Materials Research  2008年 

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年 

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

Springer Advances in Materials Research  2008年 

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年 

Evaluation methods for heterostructures

Akira Ohtomo

Nanoparticle Technology Handbook  2007年10月 

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年8月 

Invisible electronics now in sight

2007年 

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

Tohoku University,Tohoku University  2007年 

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

Tohoku University Tohoku University  2007年 

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

Tohoku University Tohoku University  2007年 

Wide bandgap semiconductors and related optoelectronic devices

Springer-Verlag GmbH  2007年 

Wide bandgap semiconductors and related optoelectronic devices

Springer-Verlag GmbH  2007年