Tohoku University   Multidisciplinary Research for Advanced Materials   Associate Professor (Lecturer)

2018.10 - 2023.3

Tohoku University   Graduate School of Science Department of Chemistry

2018.10 - 2023.3

Tokyo Institute of Technology   Department f Chemical Science and Engineering   Assistant Professor

2016.4 - 2018.9

Tokyo Institute of Technology   Department of Applied Chemistry   Assistant Professor

2013.4 - 2016.3

JSPS research fellow   PD

2012.4 - 2013.3

The University of Tokyo   Department of Applied Chemistry   Ph. D Student

2009.4 - 2012.3

JSPS research fellow   DC1

2009.4 - 2012.3

The University of Tokyo   Department of Applied Chemistry   Ph. D student

2007.4 - 2009.3

Stoichiometric CuFeO2 Thin Films Synthesized by Pulsed-Laser Deposition Using an Oxidized Target with Cu(II) Ions Reviewed International journal

Yuki Kinoshita, Takuto Soma, Hiroshi Kumigashira, Kohei Yoshimatsu, Akira Ohtomo

Crystal Growth & Design   26 ( 16 )   6274 - 6281   2026.8

Lattice-matched (Al x Sc y Ga1− x − y )2O3/ β -Ga2O3 heterostructures with widely tunable bandgap Reviewed International journal

Kazuki Koreishi, Kodai Niitsu, Takuto Soma, Kohei Yoshimatsu, Akira Ohtomo

Applied Physics Letters   129 ( 1 )   012102-1 - 012102-6   2026.7

Interface-induced collective phase transition in VO2-based bilayers studied by layer selective spectroscopy Reviewed International journal

D. Shiga, S. Inoue, T. Kanda, N. Hasegawa, M. Kitamura, K. Horiba, K. Yoshimatsu, A. F. Santander-Syro, H. Kumigashira

Scientific Reports   15 ( 1 )   36743-1 - 36743-10   2025.10

Strongly Correlated van der Waals Oxide: 2H-NbO₂ Reviewed International journal

Aya Sato, Takuto Soma, Hiroshi Kumigashira, Kohei Yoshimatsu, Akira Ohtomo

ACS Nano   19 ( 29 )   26592 - 26599   2025.7

Common anion rule in oxide heterointerfaces: Experimental verification by in situ photoemission spectroscopy Reviewed

Ryotaro Hayasaka, Tatsuhiko Kanda, Yuuki Masutake, Duy Khanh Nguyen, Naoto Hasegawa, Seitaro Inoue, Asato Wada, Miho Kitamura, Daisuke Shiga, Kohei Yoshimatsu, Hiroshi Kumigashira

APL Materials   12 ( 7 )   2024.7

Electronic phase diagram of Cr-doped VO2 epitaxial films studied by in situ photoemission spectroscopy Reviewed

D. Shiga, X. Cheng, T. T. Kim, T. Kanda, N. Hasegawa, M. Kitamura, K. Yoshimatsu, H. Kumigashira

Physical Review B   108 ( 4 )   045112-1 - 045112-9   2023.7

Quantization condition of strongly correlated electrons in oxide nanostructures Reviewed

Tatsuhiko Kanda, Daisuke Shiga, Asato Wada, Ryotaro Hayasaka, Yuuki Masutake, Naoto Hasegawa, Miho Kitamura, Kohei Yoshimatsu, Hiroshi Kumigashira

Communications Materials   4 ( 1 )   27-1 - 27-6   2023.4

パルスレーザ堆積法によるλ相Ti3O5薄膜の合成 –薄膜による準安定相図の安定化 Invited Reviewed

吉松 公平

レーザ加工学会誌   30 ( 1 )   42 - 45   2023.2

Evidence of lattice deformation induced metal-insulator transition in Ti2O3 Reviewed International journal

K. Yoshimatsu, S. Miyazaki, N. Hasegawa, H. Kumigashira

Physical Review B   106 ( 8 )   L081110–1 - L081110–6   2022.8

Electronic band structure of Ti2O3 thin films studied by angle-resolved photoemission spectroscopy Reviewed International journal

Naoto Hasegawa, Kohei Yoshimatsu, Daisuke Shiga, Tatsuhiko Kanda, Satoru Miyazaki, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira

Physical Review B   105 ( 23 )   235137 -1 - 235137 -8   2022.6

New metastable titanate λ-phase Ti3O5 ~various phase transitions and thin-film synthesis Invited Reviewed

Kohei Yoshimatsu

60 ( 5 )   12 - 20   2022.5

New metastable titanate Various functionalities and synthesis methods Invited Reviewed

Chemistry and Chemical Industry JP   75 ( 4 )   264 - 265   2022.4

Development of a versatile micro-focused angle-resolved photoemission spectroscopy system with Kirkpatrick–Baez mirror optics Reviewed

Miho Kitamura, Seigo Souma, Asuka Honma, Daisuke Wakabayashi, Hirokazu Tanaka, Akio Toyoshima, Kenta Amemiya, Tappei Kawakami, Katsuaki Sugawara, Kosuke Nakayama, Kohei Yoshimatsu, Hiroshi Kumigashira, Takafumi Sato, Koji Horiba

Review of Scientific Instruments   93 ( 3 )   033906 - 033906   2022.3

Two-dimensional superconductivity in single-band correlated 2H-type NbO2 layers Reviewed International journal

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

Physical Review B   105 ( 10 )   104504-1 - 104504-7   2022.3

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

Akira Ohtomo, Takuto Soma, Kohei Yoshimatsu

JSAP Review   2022 ( 1 )   220202-1 - 220202-8   2022.3

Direct Synthesis of Metastable λ-Phase Ti₃O₅ Films on LaAlO₃ (110) Substrates at High Temperatures Reviewed International journal

Kohei Yoshimatsu, Hiroshi Kumigashira

Crystal Growth & Design   22 ( 1 )   703 - 710   2022.1

Resonant tunneling driven metal-insulator transition in double quantum-well structures of strongly correlated oxide Reviewed International journal

R. Yukawa, M. Kobayashi, T. Kanda, D. Shiga, K. Yoshimatsu, S. Ishibashi, M. Minohara, M. Kitamura, K. Horiba, A. F. Santander-Syro, H. Kumigashira

Nature Communications   12 ( 1 )   2021.12

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

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

Physical Review B   104 ( 24 )   2021.12

Electronic structure of SrTi1−xVxO3 films studied by in situ photoemission spectroscopy: Screening for a transparent electrode material Reviewed

Tatsuhiko Kanda, Daisuke Shiga, Ryu Yukawa, Naoto Hasegawa, Duy Khanh Nguyen, Xianglin Cheng, Ryosuke Tokunaga, Miho Kitamura, Koji Horiba, Kohei Yoshimatsu, Hiroshi Kumigashira

Physical Review B   104 ( 11 )   115121 - 115121   2021.9

Epitaxial Stabilization of Complete Solid-solution β-(AlxGa1–x)2O3 (100) Films by Pulsed-laser Deposition Reviewed International journal

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

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

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

Takuto Soma, Tomohiro Kobayashi, Kohei Yoshimatsu, Akira Ohtomo

Journal of the Physical Society of Japan   90 ( 2 )   023705 - 023705   2021.2

Metallic ground states of undoped Ti2O3 films induced by elongated c-axis lattice constant Reviewed International journal

K. Yoshimatsu, N. Hasegawa, Y. Nambu, Y. Ishii, Y. Wakabayashi, H. Kumigashira

Scientific Reports   10 ( 1 )   22109-1 - 22109-9   2020.12

Thickness dependence of electronic structures in VO2 ultrathin films: Suppression of the cooperative Mott-Peierls transition Reviewed International journal

D. Shiga, B. E. Yang, N. Hasegawa, T. Kanda, R. Tokunaga, K. Yoshimatsu, R. Yukawa, M. Kitamura, K. Horiba, H. Kumigashira

Physical Review B   102 ( 11 )   115114-1 - 115114-8   2020.9

p-type transparent superconductivity in a layered oxide Reviewed

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 Reviewed International journal

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

Journal of Applied Physics   127 ( 13 )   135301 - 135301   2020.4

Temperature Evolution of Magnetic Phases Near the Thickness-Dependent Metal–Insulator Transition in La1−xSrxMnO3 Thin Films Observed by XMCD Reviewed

Goro Shibata, Kohei Yoshimatsu, Enju Sakai, Keisuke Ishigami, Shoya Sakamoto, Yosuke Nonaka, Fan-Hsiu Chang, Hong-Ji Lin, Di-Jing Huang, Chien-Te Chen, Hiroshi Kumigashira, Atsushi Fujimori

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2019)   30   011072   2020.3

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

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

High Concentration N-Doping into Ga2O3 Films by Using Pulsed-Laser Deposition with NO Plasma Reviewed International journal

J. S. Lee, R. Wakabayashi, T. Saito, K. Yoshimatsu, M. Kado, A. Ohtomo

2019 Compound Semiconductor Week, CSW 2019 - Proceedings   2019.5

High-pressure Study of Superconductivity in Ti4O7 Film Reviewed

S. Sekiguchi, T. Shiraishi, K. Miura, C. Kawashima, K. Yoshimatsu, A. Ohtomo, H. Kamioka, H. Takahashi

Journal of the Physical Chemistry Japan   88   035001   2019.2

Electronic properties across metal-insulator transition in β-pyrochlore-type CsW2O6 epitaxial films Reviewed

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

Physical Review Materials   2   115003-1 - 115003-8   2018.11

Anisotropic Charge Distribution Induced by Spin Polarization in La0.6Sr0.4MnO3 Thin Films Studied by X-ray Magnetic Linear Dichroism Reviewed International journal

Goro Shibata, Kohei Yoshimatsu, Keisuke Ishigami, Takayuki Harano, Yukio Takahashi, Shoya Sakamoto, Yosuke Nonaka, Toshiharu Kadono, Mitsuho Furuse, Schuichiro Fuchino, Makoto Okano, Jun-ichi Fujihira, Akira Uchida, Kazunori Watanabe, Hideyuki Fujihira, Seiichi Fujihira, Arata Tanaka, Hiroshi Kumigashira, Tsuneharu Koide, Atsushi Fujimori

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   87 ( 11 )   114713   2018.11

Large anisotropic conductivity in Ti2O3 films Reviewed

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 International journal

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

Applied Physics Letters   112 ( 23 )   2018.6

Magnetically-induced anisotropic charge distribution in La_1-xSr_xMnO₃ thin films revealed by x-ray magnetic linear dichroism

Shibata Goro, Fuchino Schuichiro, Okano Makoto, Fujihira Jun-ichi, Uchida Akira, Watanabe Kazunori, Fujihira Hideyuki, Fujihira Seiichi, Tanaka Arata, Kumigashira Hiroshi, Koide Tsuneharu, Yoshimatsu Kohei, Fujimori Atsushi, Ishigami Keisuke, Harano Takayuki, Takahashi Yukio, Sakamoto Shoya, Nonaka Yosuke, Kadono Toshiharu, Furuse Mitsuho

Meeting Abstracts of the Physical Society of Japan   73 ( 0 )   1538 - 1538   2018

Anisotropic spin-density distribution and magnetic anisotropy of strained La1-xSrxMnO3 thin films: angle-dependent x-ray magnetic circular dichroism Reviewed

Shibata, Goro, Kitamura, Miho, Minohara, Makoto, Yoshimatsu, Kohei, Kadono, Toshiharu, Ishigami, Keisuke, Harano, Takayuki, Takahashi, Yukio, Sakamoto, Shoya, Nonaka, Yosuke, Ikeda, Keisuke, Chi, Zhendong, Furuse, Mitsuho, Fuchino, Shuichiro, Okano, Makoto, Fujihira, Jun-ichi, Uchida, Akira, Watanabe, Kazunori, Fujihira, Hideyuki, Fujihira, Seiichi, Tanaka, Arata, Kumigashira, Hiroshi, Koide, Tsuneharu, Fujimori, Atsushi

Npj Quantum Materials   3   2018

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

Ryo Wakabayashi, Kohei Yoshimatsu, Mai Hattori, Akira Ohtomo

Applied Physics Letters   111 ( 16 )   162101 - 162101   2017.10

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

Nana Nishiyama, Hisanori Mashiko, Kohei Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, Akira Ohtomo

THIN SOLID FILMS   638   406 - 409   2017.9

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

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

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

Emergence of Quantum Critical Behavior in Metallic Quantum-Well States of Strongly Correlated Oxides Reviewed

Kobayashi, Masaki, Yoshimatsu, Kohei, Mitsuhashi, Taichi, Kitamura, Miho, Sakai, Enju, Yukawa, Ryu, Minohara, Makoto, Fujimori, Atsushi, Horiba, Koji, Kumigashira, Hiroshi

Scientific Reports   7   2017

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

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

JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 12 )   2016.12

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

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

JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 12 )   2016.12

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

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

JOURNAL OF PHYSICS-CONDENSED MATTER   28 ( 43 )   2016.11

Phonon-dressed two-dimensional carriers on the ZnO surface Reviewed International journal

R. Yukawa, K. Ozawa, S. Yamamoto, H. Iwasawa, K. Shimada, E. F. Schwier, K. Yoshimatsu, H. Kumigashira, H. Namatame, M. Taniguchi, I. Matsuda

PHYSICAL REVIEW B   94 ( 16 )   2016.10

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

Kohei Yoshimatsu, Takuto Soma, Akira Ohtomo

APPLIED PHYSICS EXPRESS   9 ( 7 )   2016.7

Epitaxial growth of hexagonal tungsten bronze CsXWO3 films in superconducting phase region exceeding bulk limit Reviewed International journal

Takuto Soma, Kohei Yoshimatsu, Akira Ohtomo

APPLIED PHYSICS EXPRESS   9 ( 7 )   2016.7

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 )   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 )   2016.5

Correlated electronic states of SrVO3 revealed by angle-resolved photoemission spectroscopy Reviewed International journal

T. Yoshida, M. Kobayashi, K. Yoshimatsu, H. Kumigashira, A. Fujimori

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA   208   11 - 16   2016.4

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

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

JOURNAL OF PHYSICAL CHEMISTRY C   120 ( 5 )   2747 - 2752   2016.2

Isotropic Kink and Quasiparticle Excitations in the Three-Dimensional Perovskite Manganite La0.6Sr0.4MnO3 Reviewed

Horiba, Koji, Kitamura, Miho, Yoshimatsu, Kohei, Minohara, Makoto, Sakai, Enju, Kobayashi, Masaki, Fujimori, Atsushi, Kumigashira, Hiroshi

Physical Review Letters   116 ( 7 )   076401   2016

19pBP-8 Time-Resolved X-ray Magnetic Circular Dichroism of Double-Perovskite Oxide Thin Films

Hirata Y., Yamamoto K., Yamamoto Sh., Pontius N., Schussler-Langeheine C., Yoshimatsu K., Ohkubo I., Kitamura M., Oshima M., Ohtomo A., Matsuda I., Wadati H.

Meeting Abstracts of the Physical Society of Japan   71   1472 - 1472   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   2015.11

Thickness-dependent magnetic properties and strain-induced orbital magnetic moment in SrRuO3 thin films Reviewed International journal

K. Ishigami, K. Yoshimatsu, D. Toyota, M. Takizawa, T. Yoshida, G. Shibata, T. Harano, Y. Takahashi, T. Kadono, V. K. Verma, V. R. Singh, Y. Takeda, T. Okane, Y. Saitoh, H. Yamagami, T. Koide, M. Oshima, H. Kumigashira, A. Fujimori

PHYSICAL REVIEW B   92 ( 6 )   2015.8

Origin of the Anomalous Mass Renormalization in Metallic Quantum Well States of Strongly Correlated Oxide SrVO3 Reviewed International journal

Masaki Kobayashi, Kohei Yoshimatsu, Enju Sakai, Miho Kitamura, Koji Horiba, Atsushi Fujimori, Hiroshi Kumigashira

PHYSICAL REVIEW LETTERS   115 ( 7 )   2015.8

Oxygen-radical-assisted pulsed-laser deposition of beta-Ga2O3 and beta-(AlxGa1-x)(2)O-3 films Reviewed International journal

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

JOURNAL OF CRYSTAL GROWTH   424   77 - 79   2015.8

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

Takayoshi Oshima, Keitaro Matsuyama, Kohei Yoshimatsu, Akira Ohtomo

JOURNAL OF CRYSTAL GROWTH   421   23 - 26   2015.7

Photoemission and x-ray absorption studies of the isostructural to Fe-based superconductors diluted magnetic semiconductor Ba1-xKx(Zn1-yMny)(2)As-2 Reviewed International journal

H. Suzuki, K. Zhao, G. Shibata, Y. Takahashi, S. Sakamoto, K. Yoshimatsu, B. J. Chen, H. Kumigashira, F-H Chang, H-J Lin, D. J. Huang, C. T. Chen, Bo Gu, S. Maekawa, Y. J. Uemura, C. Q. Jin, A. Fujimori

PHYSICAL REVIEW B   91 ( 14 )   2015.4

Phase diagram of Ca1-xCexMnO3 thin films studied by X-ray magnetic circular dichroism Reviewed International journal

T. Harano, G. Shibata, K. Yoshimatsu, K. Ishigami, V. K. Verma, Y. Takahashi, T. Kadono, T. Yoshida, A. Fujimori, T. Koide, F. -H. Chang, H. -J. Lin, D. -J. Huang, C. -T. Chen, P. -H. Xiang, H. Yamada, A. Sawa

SOLID STATE COMMUNICATIONS   207   50 - 53   2015.4

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

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

APPLIED PHYSICS EXPRESS   8 ( 3 )   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 )   2015.2

22aBD-4 Depth profile of the electronic structure of ferromagnetic-metallic La_<0.6>Sr_<0.4>MnO_3 thin films studied by resonant soft-x-ray scattering

Shibata Goro, Wadati Hiroki, Takubo Kou, Takahashi Yukio, Sutarto Ronny, He Feizhou, Yoshimatsu Kohei, Kumigashira Hiroshi, Koide Tsuneharu, Fujimori Atsushi

Meeting Abstracts of the Physical Society of Japan   70   2082 - 2082   2015

23pBE-4 Critical Behavior near Metal-Insulator Transition in Strongly Correlated Oxide SrVO_3 Thin Films

Kobayashi M., Yoshimatsu K., Sakai E., Kitamura M., Horiba K., Fujimori A., Kumigashira H.

Meeting Abstracts of the Physical Society of Japan   70   2317 - 2317   2015

Photoemission and DMFT study of electronic correlations in SrMoO3: Effects of Hund's rule coupling and possible plasmonic sideband Reviewed International journal

H. Wadati, J. Mravlje, K. Yoshimatsu, H. Kumigashira, M. Oshima, T. Sugiyama, E. Ikenaga, A. Fujimori, A. Georges, A. Radetinac, K. S. Takahashi, M. Kawasaki, Y. Tokura

PHYSICAL REVIEW B   90 ( 20 )   2014.11

Observation of magnetically hard grain boundaries in double-perovskite Sr2FeMoO6 Reviewed International journal

Y. Takahashi, V. K. Verma, G. Shibata, T. Harano, K. Ishigami, K. Yoshimatsu, T. Kadono, A. Fujimori, A. Tanaka, F. -H. Chang, H. -J. Lin, D. J. Huang, C. T. Chen, B. Pal, D. D. Sarma

EPL   108 ( 2 )   2014.10

Thickness-dependent ferromagnetic metal to paramagnetic insulator transition in La0.6Sr0.4MnO3 thin films studied by x-ray magnetic circular dichroism Reviewed International journal

G. Shibata, K. Yoshimatsu, E. Sakai, V. R. Singh, V. K. Verma, K. Ishigami, T. Harano, T. Kadono, Y. Takeda, T. Okane, Y. Saitoh, H. Yamagami, A. Sawa, H. Kumigashira, M. Oshima, T. Koide, A. Fujimori

PHYSICAL REVIEW B   89 ( 23 )   2014.6

Bandwidth-controlled metal-insulator transition in epitaxial PrNiO3 ultrathin films induced by dimensional crossover Reviewed International journal

Enju Sakai, Kohei Yoshimatsu, Masatomo Tamamitsu, Koji Horiba, Atsushi Fujimori, Masaharu Oshima, Hiroshi Kumigashira

APPLIED PHYSICS LETTERS   104 ( 17 )   2014.4

Phase diagram of Ca1-xCexMnO3 thin films studied by X-ray magnetic circular dichroism Reviewed International journal

T. Harano, G. Shibata, K. Yoshimatsu, K. Ishigami, V. K. Verma, Y. Takahashi, T. Kadono, T. Yoshida, A. Fujimori, T. Koide, F. -H. Chang, H. -J. Lin, D. -J. Huang, C. -T. Chen, P. -H. Xiang, H. Yamada, A. Sawa

SOLID STATE COMMUNICATIONS   174   30 - 33   2013.11

Spectroscopic studies on the electronic and magnetic states of Co-doped perovskite manganite Pr0.8Ca0.2Mn1-yCoyO3 thin films Reviewed International journal

K. Yoshimatsu, H. Wadati, E. Sakai, T. Harada, Y. Takahashi, T. Harano, G. Shibata, K. Ishigami, T. Kadono, T. Koide, T. Sugiyama, E. Ikenaga, H. Kumigashira, M. Lippmaa, M. Oshima, A. Fujimori

PHYSICAL REVIEW B   88 ( 17 )   2013.11

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

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

APPLIED PHYSICS EXPRESS   6 ( 10 )   2013.10

Determination of the surface and interface phase shifts in metallic quantum well structures of perovskite oxides Reviewed International journal

K. Yoshimatsu, E. Sakai, M. Kobayashi, K. Horiba, T. Yoshida, A. Fujimori, M. Oshima, H. Kumigashira

Physical Review B - Condensed Matter and Materials Physics   88 ( 11 )   2013.9

Gradual localization of Ni 3d states in LaNiO3 ultrathin films induced by dimensional crossover Reviewed International journal

Enju Sakai, Masatomo Tamamitsu, Kohei Yoshimatsu, Satoshi Okamoto, Koji Horiba, Masaharu Oshima, Hiroshi Kumigashira

PHYSICAL REVIEW B   87 ( 7 )   2013.2

Development of Cryocooled YBCO Vector Magnet System with Three-axial Super-high Vacuum Bores Reviewed

Jun-ichi Fujihira, Akira Uchida, Sei-ichi Fujihira, Mituho Furuse, Makoto Okano, Shuichiro Fuchino, T. Kadono, Kohei Yoshimatsu, A. Fujimori, Hiroshi Kumigashira, Tsuneharu Koide

Journal of Cryogenics and Superconductivity Society Japan   48 ( 5 )   233 - 238   2013

Core level and valence band spectroscopy of SrRuO3: Electron correlation and covalence effects Reviewed International journal

E. B. Guedes, M. Abbate, K. Ishigami, A. Fujimori, K. Yoshimatsu, H. Kumigashira, M. Oshima, F. C. Vicentin, P. T. Fonseca, R. J. O. Mossanek

PHYSICAL REVIEW B   86 ( 23 )   2012.12

Epitaxially Stabilized EuMoO3: A New Itinerant Ferromagnet Reviewed International journal

Yusuke Kozuka, Hidenobu Seki, Takahiro C. Fujita, Suvankar Chakraverty, Kohei Yoshimatsu, Hiroshi Kumigashira, Masaharu Oshima, Mohammad S. Bahramy, Ryotaro Arita, Masashi Kawasaki

CHEMISTRY OF MATERIALS   24 ( 19 )   3746 - 3750   2012.10

Self-Energy on the Low- to High-Energy Electronic Structure of Correlated Metal SrVO3 Reviewed

Aizaki, S., Yoshida, T., Yoshimatsu, K., Takizawa, M., Minohara, M., Ideta, S., Fujimori, A., Gupta, K., Mahadevan, P., Horiba, K., Kumigashira, H., Oshima, M.

Physical Review Letters   109 ( 5 )   2012

Competition between instabilities of Peierls transition and Mott transition in W-doped VO2 thin films Reviewed International journal

Enju Sakai, Kohei Yoshimatsu, Keisuke Shibuya, Hiroshi Kumigashira, Eiji Ikenaga, Masashi Kawasaki, Yoshinori Tokura, Masaharu Oshima

PHYSICAL REVIEW B   84 ( 19 )   2011.11

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

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

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

PHYSICAL REVIEW B   84 ( 13 )   2011.10

Metal-insulator transition and two-dimensional electron liquid in SrVO3 ultrathin films Reviewed

K. Yoshimatsu, Koji Horiba, H. Kumigashira, Teppei Yoshida, A. Fujimori, M. Oshima

2011

Pressure-induced change in the electronic structure of epitaxially strained La1-xSrxMnO3 thin films Reviewed International journal

K. Horiba, A. Maniwa, A. Chikamatsu, K. Yoshimatsu, H. Kumigashira, H. Wadati, A. Fujimori, S. Ueda, H. Yoshikawa, E. Ikenaga, J. J. Kim, K. Kobayashi, M. Oshima

PHYSICAL REVIEW B   80 ( 13 )   2009.10

Chemical stability and transport properties of ultrathin La1.2Sr1.8Mn2O7 Ruddlesden-Popper films Reviewed International journal

M. Matvejeff, K. Yoshimatsu, H. Kumigashira, M. Oshima, M. Lippmaa

APPLIED PHYSICS LETTERS   95 ( 15 )   2009.10

Yoshimatsu et al. Reply Reviewed International journal

K. Yoshimatsu, R. Yasuhara, H. Kumigashira, M. Oshima

PHYSICAL REVIEW LETTERS   102 ( 19 )   2009.5

Thickness dependent electronic structure of La0.6Sr0.4MnO3 layer in SrTiO3/La0.6Sr0.4MnO3/SrTiO3 heterostructures studied by hard x-ray photoemission spectroscopy Reviewed International journal

K. Yoshimatsu, K. Horiba, H. Kumigashira, E. Ikenaga, M. Oshima

APPLIED PHYSICS LETTERS   94 ( 7 )   2009.2

共鳴軟X線散乱による強磁性金属La_0.6Sr_0.4MnO₃薄膜の深さ方向電子状態解析

芝田悟朗, 和達大樹, 田久保耕, 高橋文雄, SUTARTO Ronny, HE Feizhou, 吉松公平, 組頭広志, 小出常晴, 藤森淳

日本物理学会講演概要集(CD-ROM)   70 ( 1 )   ROMBUNNO.22ABD-4   2015.3

角度依存XMCDによるLa_0.6Sr_0.4MnO₃薄膜の磁気異方性とスピン分布異方性の観測

芝田悟朗, 吉松公平, 石上啓介, 原野貴幸, 高橋文雄, 坂本祥哉, 門野利治, 古瀬充穂, 淵野修一郎, 岡野眞, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一, 組頭広志, 組頭広志, 小出常晴, 藤森淳

日本物理学会講演概要集(CD-ROM)   70 ( 2 )   2015

21aCN-9 Polarization-Dependent ARPES Study of Perovskite Transition Metal Oxide SrVO_3(110) Thin Films

Mitsuhashi T, Minohara M, Kitamura M, Sakai E, Horiba K, Yoshimatsu K, Fujimori A, Kobayashi M, Kumigashira H

Meeting Abstracts of the Physical Society of Japan   70 ( 0 )   1425 - 1425   2015

強磁性金属La_0.6Sr_0.4MnO₃薄膜の共鳴軟X線散乱 II

芝田悟朗, 和達大樹, 田久保耕, 高橋文雄, 藤森淳, SUTARTO R, HE F, 吉松公平, 組頭広志, 小出常晴

日本物理学会講演概要集   69 ( 2 )   339   2014.8

7pBG-8 Resonant soft-x-ray scattering of ferromagnetic-metallic La_<0.6>Sr_<0.4>MnO_3 thin films II

Shibata G., Wadati H., Takubo K., Takahashi Y., Fujimori A., Sutarto R., He F., Yoshimatsu K., Kumigashira H., Koide T.

Meeting abstracts of the Physical Society of Japan   69 ( 2 )   339 - 339   2014.8

27pCG-8 Origin of Anomalous Mass Enhancement in Metallic Quantum Well States of Strongly Correlated Oxide SrVO_3

Kobayashi M., Yoshimatsu K., Sakai E., Kitamura M., Horiba K., Fujimori A., Kumigashira H.

Meeting abstracts of the Physical Society of Japan   69 ( 1 )   566 - 566   2014.3

共鳴軟X線散乱による強磁性金属La_0.6Sr_0.4MnO₃薄膜中の正孔分布の推定

芝田悟朗, 和達大樹, 田久保耕, 高橋文雄, 藤森淳, SUTARTO R, HE F, 吉松公平, 組頭広志, 小出常晴

日本放射光学会年会・放射光科学合同シンポジウム予稿集   27th   124   2014.1

30aAY-1 Photoemission and X-ray magnetic circular dichroism study of a new diluted magnetic semiconductor Ba_<1-y>K_y(Zn_<1-x>Mn_x)_2As_2

Suzuki H, Huang D. J, Chen C. T, Zhao K, Jin C. Q, Gu Bo, Maekawa S, Uemura Y. J, Shibata G, Takahashi Y, Sakamoto S, Yoshimatsu K, Kumigashira H, Fujimori A, Chang F.-H, Lin H.-J

Meeting Abstracts of the Physical Society of Japan   69 ( 0 )   904 - 904   2014

角度依存X線磁気円二色性による基板応力下La_0.6Sr_0.4MnO₃の磁気異方性と異方的スピン分布の観測

芝田悟朗, 門野利治, 石上啓介, 原野貴幸, 吉松公平, 吉松公平, 高橋文雄, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一, 古瀬充穂, 淵野修一郎, 岡野眞, 組頭広志, 小出常晴, 藤森淳

物構研サイエンスフェスタ要旨集   2013   2014

Electronic correlations and Hund's coupling efrects in SrMoO_3 revealed by photoemission spectroscopy

Wadati H., Yoshimatsu K., Kumigashira H., Oshima M., Sugiyama T., Ikenaga E., Fujimori A., Mravlje J., Georges A., Takahashi K.S., Kawasaki M., Tokura Y.

Meeting abstracts of the Physical Society of Japan   68 ( 2 )   578 - 578   2013.8

強磁性金属La_0.6Sr_0.4MnO₃薄膜の共鳴軟X線散乱

芝田悟朗, 和達大樹, 田久保耕, 高橋文雄, 藤森淳, SUTARTO R, HE F, 吉松公平, 組頭広志

日本物理学会講演概要集   68 ( 2 )   539   2013.8

Resonant soft-x-ray scattering of ferromagnetic-matellic La_<0.6>Sr0.4MnO_3 thin films

Shibata G, Wadati H., Takubo K., Takahashi Y., Fujimori A., Sutarto R., He F., Yoshimatsu K., Kumigashira H.

Meeting abstracts of the Physical Society of Japan   68 ( 2 )   539 - 539   2013.8

29aEJ-4 Self-energy on the low-to high-energy electronic structure of SrVO_3

Yoshida T., Aizaki S., Yoshimatsu K., Takizawa M., Minohara M., Ideta S., Fujimori A., Gupta K., Mahadevan P., Horiba K., Kumigashira H., Oshima M.

Meeting abstracts of the Physical Society of Japan   68 ( 1 )   854 - 854   2013.3

27aXY-8 Angle-dependent x-ray magnetic circular dichroism and x-ray magnetic linear dichroism of ferromagnetic La_<0.6>Sr_<0.4>MnO_3 thin films

Shibata G., Kadono T., Ishigami K., Harano T., Takahashi Y., Yoshimatsu K., Fujimori A., Koide T., Kumigashira H., Furuse M., Fuchino S., Okano M., Fujihira J., Uchida A., Watanabe K., Fujihira H., Fujihira S.

Meeting abstracts of the Physical Society of Japan   68 ( 1 )   604 - 604   2013.3

軟X線磁気円二色性を用いたSr₂FeMoO₆多結晶の異常な磁気抵抗の機構解明

高橋文雄, VERMA V. K., 石上啓介, 芝田悟朗, 原野貴幸, 吉松公平, 門野利治, 藤森淳, 田中新, CHANG F.-H., LIN H.-J., HUANG D. J., CHEN C. T., PAL B., SARMA D. D.

日本物理学会講演概要集   68 ( 1 )   2013

CoドープPr_0.8Ca_0.2MnO₃薄膜のX線磁気円二色性

吉松公平, 和達大樹, 原田尚之, 高橋文雄, 原野貴幸, 芝田悟朗, 石上啓介, 門野利治, 小出常晴, LIPPMAA Mikk, 藤森淳

物構研サイエンスフェスタ要旨集   1st   2013

ベクトル型超伝導マグネットを用いた強磁性薄膜La_0.6Sr_0.4MnO₃の角度依存XMCD

芝田悟朗, 門野利治, 石上啓介, 原野貴幸, 高橋文雄, 吉松公平, 吉松公平, 藤森淳, 藤森淳, 小出常晴, 組頭広志, 組頭広志, 古瀬充穂, 淵野修一郎, 岡野眞, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一

日本放射光学会年会・放射光科学合同シンポジウム予稿集   26th   2013

ベクトル型超伝導マグネットを用いたXMCD測定装置の開発

門野利治, 石上啓介, 芝田悟朗, 原野貴幸, 高橋文雄, 吉松公平, 吉松公平, 藤森淳, 小出常晴, 組頭広志, 組頭広志, 古瀬充穂, 淵野修一郎, 岡野眞, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一

日本放射光学会年会・放射光科学合同シンポジウム予稿集   26th   2013

SrRuO₃薄膜のX線磁気円二色性の軌道磁気モーメント

石上啓介, 吉松公平, 芝田悟朗, 原野貴幸, 高橋文雄, 門野利治, VERMA V. K., SINGH V. R., 藤森淳, 藤森淳, 小出常晴, 竹田幸治, 岡根哲夫, 斎藤祐児, 山上浩志, 組頭広志, 尾嶋正治

日本物理学会講演概要集   68 ( 2 )   2013

強磁性薄膜La_0.6Sr_0.4MnO₃の角度依存X線磁気円二色性およびX線磁気線二色性

芝田悟朗, 門野利治, 石上啓介, 原野貴幸, 高橋文雄, 吉松公平, 吉松公平, 藤森淳, 藤森淳, 小出常晴, 組頭広志, 組頭広志, 古瀬充穂, 淵野修一郎, 岡野眞, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一

物構研サイエンスフェスタ要旨集   1st   2013

強磁性薄膜La_0.6Sr_0.4MnO₃の角度依存X線磁気円二色性およびX線磁気線二色性

芝田悟朗, 門野利治, 石上啓介, 原野貴幸, 高橋文雄, 吉松公平, 吉松公平, 藤森淳, 藤森淳, 小出常晴, 組頭広志, 組頭広志, 古瀬充穂, 淵野修一郎, 岡野眞, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一

日本物理学会講演概要集   68 ( 1 )   2013

20pFG-15 Metal-insulator and spin structure transition in Ca_<1-x>Ce_xMnO_3 thin film studied by x-ray magnetic circular dichroism

Harano T., Shibata G., Ishigami K., Verma V. K., Takahashi F., Yoshimatsu K., Kadono T., Yoshida T., Fujimori A., Koide T., Chang F. -H., Lin H. -J., Huang D. -J., Chen C. -T., Xiang P. -H., Yamada H., Sawa A., Tanaka A.

Meeting abstracts of the Physical Society of Japan   67 ( 2 )   546 - 546   2012.8

19pFE-7 Hard x-ray photoemission study on Sm_<1-x>Ca_xNiO_3 ultrathin films

Yoshimatsu K., Sakai E., Xiang Ping-Hua, Asanuma S., Yamada H., Sawa A., Ikenaga E., Horiba K., Oshima M., Kumigashira H.

Meeting abstracts of the Physical Society of Japan   67 ( 2 )   482 - 482   2012.8

19pFE-6 Substrate dependent change in the electronic structure of LaNiO_3 uttrathin films

Sakai Enju, Tamamitsu Masatomo, Yoshimatsu Kohei, Horiba Koji, Oshima Masaharu, Kumigashira Hiroshi

Meeting abstracts of the Physical Society of Japan   67 ( 2 )   482 - 482   2012.8

18aHC-4 Angle-dependent XMCD of ferromagnetic La_<0.6>Sr_<0.4>MnO_3 thin films using a vector-type superconducting magnet

Shibata G., Ishigami K., Harano T., Takahashi Y., Yoshimatsu K., Kadono T., Fujimori A., Koide T., Kumigashira H., Furuse M., Fuchino S., Okano M., Fujihira J., Uchida A., Watanabe K., Fujihira H., Fujihira S.

Meeting abstracts of the Physical Society of Japan   67 ( 2 )   657 - 657   2012.8

27aAC-6 Soft x-ray magnetic circular dichroism study on thickness-dependent phase transitions of La_<0.6>Sr_<0.4>MnO_3

Shibata G., Singh V. R., Verma V. K., Ishigami K., Harano T., Kadono T., Fujimori A., Koide T., Takeda Y., Okanbe T., Saitoh Y., Yamagami H., Yoshimatsu K., Sakai E., Kumigashira H., Oshima M., Sawa A.

Meeting abstracts of the Physical Society of Japan   67 ( 1 )   816 - 816   2012.3

26pYH-4 Competition between instabilities of Peterls transition and Mott transition in W-doped VO_2 thin films

Sakai Enju, Yoshimatsu Kohei, Shibuya Keisuke, Kumigashira Hiroshi, Ikenaga Eiji, Kawasaki Masashi, Tokura Yoshinori, Oshima Masaharu

Meeting abstracts of the Physical Society of Japan   67 ( 1 )   675 - 675   2012.3

26pAD-1 Quantum well states in artificial structure of strongly correlated oxide

Yoshimatsu Kohei

Meeting abstracts of the Physical Society of Japan   67 ( 1 )   661 - 661   2012.3

軟X線磁気円二色性によるLa_0.6Sr_0.4MnO₃薄膜の膜厚依存相転移の研究

芝田悟朗, SINGH V. R., VERMA V. K., 石上啓介, 原野貴幸, 門野利治, 藤森淳, 藤森淳, 小出常晴, 竹田幸治, 岡根哲夫, 斎藤祐児, 山上浩志, 吉松公平, 坂井延寿, 組頭広志, 組頭広志, 尾嶋正治, 澤彰仁

日本物理学会講演概要集   67 ( 1 )   2012

基板選択により磁気特性が変化するCa_1-xCe_xMnO₃薄膜のX線磁気円二色性

原野貴幸, 芝田悟朗, 石上啓介, VERMA V. K., 高橋文雄, 吉松公平, 門野利治, 吉田鉄平, 藤森淳, 小出常晴, CHANG F.-H., LIN H.-J., HUANG D.-J., CHEN C.-T., XIANG P.-H., 山田浩之, 澤彰仁, 田中新

日本物理学会講演概要集   67 ( 2 )   2012

ダブルペロブスカイト型酸化物Sr₂FeMoO₆におけるスピンバルブ効果のX線磁気円二色性による検証

高橋文雄, VERMA V. K., 芝田悟朗, 原野貴幸, 石上啓介, 吉松公平, 門野利治, 藤森淳, CHANG F. H., LIN H. J., HUANG S. J., CHEN C. T., PAL Banabir, SARMA D. D.

日本物理学会講演概要集   67 ( 2 )   2012

SrRuO₃薄膜のX線磁気円二色性測定

石上啓介, 吉松公平, VERMA V. K., 芝田悟朗, 原野貴幸, 門野利治, 藤森淳, 藤森淳, SINGH V. R., 小出常晴, 竹田幸治, 岡根哲夫, 斎藤祐児, 山上浩志, 組頭広志, 組頭広志, 尾嶋正治

日本物理学会講演概要集   67 ( 1 )   2012

ベクトル型超伝導マグネットを用いた強磁性薄膜La_0.6Sr_0.4MnO₃の角度依存XMCD

芝田悟朗, 石上啓介, 原野貴幸, 高橋文雄, 吉松公平, 吉松公平, 門野利治, 藤森淳, 藤森淳, 小出常晴, 組頭広志, 組頭広志, 古瀬充穂, 淵野修一郎, 岡野眞, 藤平潤一, 内田公, 渡邊和訓, 藤平秀幸, 藤平誠一

日本物理学会講演概要集   67 ( 2 )   2012

21aGB-3 Study on the thickness dependence of the magnetism of La_<0.6>Sr_<0.4>MnO_3 by x-ray magnetic circular dichroism

Shibata G., Singh V. R., Verma V. K., Ishigami K., Kadono T., Fujimori A., Koide T., Yoshimatsu K., Sakai E., Kumigashira H., Oshima M.

Meeting abstracts of the Physical Society of Japan   66 ( 2 )   452 - 452   2011.8

24pGE-6 Dimensionally controlled metal-insulator transition in LaNiO_3 thin films

Sakai Enju, Tamamitsu M., Yoshimatsu K., Kumigashira H., Oshima M.

Meeting abstracts of the Physical Society of Japan   66 ( 2 )   653 - 653   2011.8

21aTN-11 Low-dimensional electronic structures on SrVO_3 ultrathin films

Yoshimatsu K., Horiba K., Kumigashira H., Fujimori A., Yoshida T., Oshima M.

Meeting abstracts of the Physical Society of Japan   66 ( 2 )   721 - 721   2011.8

25aED-10 Hard and soft x-ray photoemission studies of SrMoO_3 and CaMoO_3 thin films

Wadati H., Yoshimatsu K., Kumigashira H., Oshima M., Sugiyama T., Ikenaga E., Takahashi K. S., Kawasaki M., Tokura Y.

Meeting abstracts of the Physical Society of Japan   66 ( 1 )   522 - 522   2011.3

27pED-2 Thickness dependence of soft X-ray magnetic circular dichroism and linear dichroism of La_<0.6>Sr_<0.4>MnO_3 thin films

Shibata G., Singh V. R., Verma V. K., Ishigami K., Fujimori A., Koide T., Yoshimatsu K., Sakai E., Kumagashira H., Oshima M.

Meeting abstracts of the Physical Society of Japan   66 ( 1 )   634 - 634   2011.3

24pRE-2 Soft x-ray angle resolved photoemission study on SrRuO_3 thin film

Yoshimatsu K., Sakai E., Kumigashira H., Fujimori A., Oshima M.

Meeting abstracts of the Physical Society of Japan   65 ( 2 )   702 - 702   2010.8

24aPS-11 Thickness dependence of soft X-ray magnetic circular dichroism of La_<0.6>Sr_<0.4>MnO_3 thin films

Shibata G., Ishigami K., Singh V. R., Verma V. K., Fujimori A., Koide T., Yoshimatsu K., Kumigashira H., Oshima M.

Meeting abstracts of the Physical Society of Japan   65 ( 2 )   556 - 556   2010.8

21aHK-1 High resolution angle-resolved photoemission study of epitaxially-grown SrVO_3 thin films

Aizaki S., Yoshimatsu K., Minohara M., Ideta S., Yoshida T., Horiba K., Kumigashira H., Oshima M., Fujimori A.

Meeting abstracts of the Physical Society of Japan   65 ( 1 )   748 - 748   2010.3

25aRG-9 低次元化によりバンド幅制御したSrVO_3薄膜の電子状態(Ti,V酸化物,領域8,強相関系:高温超伝導,強相関f電子系など)

吉松 公平, 岡部 崇志, 組頭 広志, 岡本 敏史, 相崎 真一, 藤森 淳, 尾島 正治

日本物理学会講演概要集   64 ( 2 )   404 - 404   2009.8

26aXA-8 Self-energy analysis of kink in the V3d band dispersion of SrVO_3

Aizaki S., Yoshimatsu K., Ideta S., Yoshida T., Horiba K., Kumigashira H., Oshima M., Fujimori A.

Meeting abstracts of the Physical Society of Japan   64 ( 2 )   630 - 630   2009.8

29pTD-10 High resolution angle-resolved photoemission study of SrVO_3 thin films

Aizaki S., Yoshimatsu K., Ideta S., Yoshida T., Horiba K., Kumigashira H., Oshima M., Fujimori A.

Meeting abstracts of the Physical Society of Japan   64 ( 1 )   635 - 635   2009.3

21pQF-5 Hard X-ray photoemission study on SrTiO_3/La_<0.6>Sr_<0.4>MnO_3/SrTiO_3 structures with termination-controlled upper interface

Yoshimatsu K., Horiba K., Kumigashira H., Ikenaga E., Oshima M.

Meeting abstracts of the Physical Society of Japan   63 ( 2 )   532 - 532   2008.8

25pWQ-12 Soft X-ray Photoemission Study of La_<1-x>Sr_xTiO_3 Thin Films

Ishigami K., Yoshimatsu K., Takizawa M., Kumigashira H., Oshima M., Yoshida T., Fujimori A.

Meeting abstracts of the Physical Society of Japan   63 ( 1 )   623 - 623   2008.2

22pWF-6 Electronic structure at the metallic interface between LaAlO_3 and SrTiO_3 studied by in situ photoemission spectroscopy

Yoshimatsu K., Yasuhara R., Kumigashira H., Oshima M.

Meeting abstracts of the Physical Society of Japan   62 ( 2 )   601 - 601   2007.8

Synthesis of Metastable Titanate Film for Optoelectronic Applications Invited

K. Yoshimatsu

Advanced Materials & 10th Intermetallic Symposium  2023.2 

Modulation of superconductivity using Li-ion secondary battery technique Invited International conference

K. Yoshimatsu

International Congress on Pure and Applied Chemistry (ICPAC) Kota Kinabalu 2022  2022.11 

密度汎関数法によるTi2O3の金属絶縁体転移

吉松 公平, 長谷川 直人, 組頭 広志

第83回応用物理学会秋季学術講演会  2022.9 

Metal-insulator transitions in titanium-sesquioxide films Invited

K. Yoshimatsu

Global Experts Meet on Condensed Matter Physics 2022  2022.6 

Direct synthesis of λ-phase Ti3O5 films on LaAlO3 (110) substrates

Kohei Yoshimatsu, Hiroshi Kumigashira

2022.3 

Metallic conductivity in undoped Ti2O3 films

K. Yoshimatsu, N. Hasegawa, Y. Nambu, Y. Ishii, Y. Wakabayashi, H. Kumigashira

Materials Research Meeting 2021  2021.12 

Metal-insulator transition of corundum-type Ti2O3 films Invited

K. Yoshimatsu

CONMAT 2021 Global Summit on Condensed Mater Physics  2021.10 

Metallic conductivity in Ti2O3 films

2021.3 

Investigation of Electronic and Magnetic Properties for Complex Transition-Metal Oxides using Soft X-ray Spectroscopy Invited

K. Yoshimatsu

GP-Spin Student Organized Seminar 2020  2020.2 

Superconductivity in higher titanates of g-Ti3O5 and Ti4O7 films International conference

K. Yoshimatsu, O. Sakata, A. Ohtomo

26th International Conference on Oxide Electronics  2019.10 

Electrochemical modulation of superconductivity in oxide thin films Invited

YOSHIMATSU Kohei

Joint Meeting of the Tohoku Area Chemistry Societies  2019.9 

Superconducting titanate films, epitaxial growth and distinction of crystal phases Invited International conference

YOSHIMATSU Kohei

19th International Conference on Crystal Growth and Epitaxy (ICCGE-19)  2019.7 

Growth of group of IV hydride films using pulsed-laser deposition Invited International conference

K. Yoshimatsu

The 4th Korea-Japan Joint Symposium on Hydrogen in Materials  2018.11 

酸化チタン系超伝導材料の創生と電子デバイス応用 Invited

吉松 公平

ファインケミカルジャパン2018  2018 

Modulation of Electronic Properties of Oxide Thin Films Using Electrochemical Reactions Invited International conference

K. Yoshimatsu

The 7th Annual World Congress of Nano Science and Technology-2017 (Nano S&T-2017)  2017.11 

Epitaxial growth and physical properties of low-valence titanium oxide films Invited International conference

K. Yoshimatsu

Collaborative Conference on Materials Research (CCMR) 2017  2017.6 

Superconductivity in higher titanium oxides

K. Yoshimatsu, O.Sakata,A.ohtomo

3rd Functional Oxide Thin Films for Advanced Energy and Information Technology Conference  2017 

高品質γ-Ti₃O₅薄膜の合成と超伝導特性 Invited

吉松 公平, 坂田 修身, 大友 明

第63回応用物理学会春季学術講演会  2016 

前周期遷移金属酸化物超伝導体の薄膜合成と制御 Invited

吉松 公平

第４回酸化物研究の新機軸に向けた学際討論会  2016 

γ-Ti₃O₅ 薄膜の超伝導

吉松 公平, 坂田 修身, 大友 明

第76回応用物理学会秋季学術講演会  2015 

マグネリ相Ti酸化物薄膜の超伝導

吉松 公平, 坂田 修身, 大友 明

第76回応用物理学会秋季学術講演会  2015 

低原子価Ti系薄膜の合成と超伝導物性制御 Invited

吉松 公平

第52回化合物磁性材料研究会 薄膜新材料の合成・分光・理論  2015 

Synthesis and spectroscopic study on double-perovskite oxide thin films Invited International conference

K. Yoshimatsu, K. Nogami, K. Watarai, H. Mashiko, E. Sakai, H. Kumigashira, O. Sakata, T. Oshima, A. Ohtomo

2014 Energy Materials Nanotechnology Open Access week  2014.9 

放射光光電子分光法による強相関量子化状態の観測 Invited

吉松 公平

第27回日本放射光学会年会放射光科学合同シンポジウム 学会奨励賞受賞講演  2014 

TiO_x薄膜の合成と物性

吉松 公平, 大島 孝仁, 大友 明

第75回応用物理学会秋季学術講演会  2014 

Electronic and magnetic states of Co-doped Pr_0.8Ca_0.2MnO₃ International conference

K. Yoshimatsu, H. Wadati, Takayuki Harada, Yukio Takahashi, Takayuki Harano, Goro Shibata, Keisuke Ishigami, Toshiharu Kadono, Tsuneharu Koide, M. Lippmaa, M. Oshima, A. Fujimori

2013 JSAP-MRS Joint Symposia  2013 

Metallic quantum well states in artificial structures of strongly correlated oxide Invited International conference

K. Yoshimatsu, H. Kumigashira

The 6th AOFSRR 2012  2013 

硬X線光電子分光によるSm1-xCaxNiO3薄膜の電子状態

吉松 公平, 坂井 延寿, Xiang P. -H, 浅沼周太郎, 山田浩之, 澤彰仁, 池永 英司, 堀場弘司, 尾嶋 正治, 組頭 広志

第26回日本放射光学会年会放射光科学合同シンポジウム  2013 

Quantum confinement of strongly correlated electrons in oxide artificial structures Invited International conference

K. Yoshimatsu

IMS Workshop on ASCM  2013 

強相関酸化物 SrVO3 における量子井戸状態

吉松 公平, 堀場 弘司, 組頭 広志, 吉田 鉄平, 藤森 淳, 尾嶋 正治

第25回日本放射光学会年会放射光科学合同シンポジウム  2012 

酸化物量子井戸構造における強相関電子の量子化状態 Invited

吉松 公平, 堀場弘司, 組頭 広志, 吉田鉄平, 藤森 淳, 尾嶋 正治

第67回日本物理学会年次会  2012 

Sm1-xCaxNiO3薄膜の硬X線光電子分光

吉松 公平, 坂井 延寿, Xiang P. -H, 浅沼周太郎, 山田浩之, 澤彰仁, 池永 英司, 堀場弘司, 尾嶋 正治, 組頭 広志

日本物理学会２０１２年秋季大会  2012 

酸化物量子井戸構造による強相関電子の２次元閉じ込め

吉松 公平, 堀場弘司, 組頭 広志, 吉田鉄平, 藤森 淳, 尾嶋 正治

2012年春季第59回応用物理学関係連合講演会  2012 

Electronic structures of hole-doped perovskite nickelate Sm1-xCaxNiO3 thin films studied by hard x-ray photoemission spectroscopy International conference

K. Yoshimatsu, E. Sakai, P, H. Xiang, S. Asanuma, H. Yamada, A. Sawa, E. Ikenaga, K. Horiba, Masaharu Oshima, H. Kumigashira

The 19th International Workshop on Oxides Electronics  2012 

酸化物量子井戸構造による強相関電子の量子閉じ込め Invited

吉松 公平, 堀場 弘司, 組頭 広志, 吉田 鉄平, 藤森 淳, 尾嶋 正治

2012年秋季第73回応用物理学会学術講演会  2012 

強相関酸化物薄膜における量子井戸状態

吉松 公平, 堀場弘司, 組頭 広志, 吉田鉄平, 藤森 淳, 尾嶋 正治

第58回応用物理学関係連合講演会  2011 

SrRuO3薄膜のin situ角度分解光電子分光

吉松 公平, 坂井延寿, 組頭 広志, 藤森 淳, 尾嶋 正治

第24回日本放射光学会年会放射光科学合同シンポジウム  2011 

Fermi surface of SrRuO3 thin films studied by in situ soft x-ray angle-resolved photoemission spectroscopy International conference

K. Yoshimatsu, E. Sakai, H. Kumigashira, A. Fujimori, M. Oshima

The 4th Indo-Japan Seminar  2011 

Metallic Quantum Well States in Artificial Structures of Strongly Correlated Oxide International conference

K. Yoshimatsu, Koji Horiba, H. Kumigashira, Teppei Yoshida, A. Fujimori, M. Oshima

FIRST-QS2C WS on ”Emergent Phenomena of Correlated Materials”  2011 

Metal-insulator transition and two-dimensional electron liquid in SrVO3 ultrathin films Invited International conference

K. Yoshimatsu, T. Okabe, H. Kumigashira, Satoshi Okamoto, S. Aizaki, A. Fujimori, M. Oshima

The 4th Indo-Japan Seminar  2011 

Dimensional-crossover-driven metal-insulator transition in SrVO3 ultrathin films International conference

K. Yoshimatsu, T. Okabe, H. Kumigashira, S. Okamoto, S. Aizaki, A. Fujimori, M. Oshima

The 4th Indo-Japan Seminar  2011 

SrVO3の極薄膜化による低次元電子状態

吉松 公平, 堀場弘司, 組頭 広志, 吉田鉄平, 藤森 淳, 尾嶋 正治

日本物理学会2011年秋季大会  2011 

低次元化に伴い金属絶縁体転移を起こすSrVO3薄膜のin situ 放射光光電子分光

吉松 公平, 岡部 崇志, 組頭 広志, 岡本敏史, 相崎 真一, 藤森 淳, 尾嶋 正治

第23回日本放射光学会年会放射光科学合同シンポジウム  2010 

SrRuO3薄膜の軟X線角度分解光電子分光

吉松 公平, 坂井延寿, 組頭 広志, 藤森 淳, 尾嶋 正治

第66回日本物理学会年次大会  2010 

Fermi surface of SrRuO3 thin films studied by soft x-ray angle-resolved photoemission spectroscopy International conference

K. Yoshimatsu, E. Sakai, H. Kumigashira, A. Fujimori, M. Oshima

The 17th International Workshop on Oxides Electronics  2010 

In situ angle-resolved photoemission study on SrRuO3 thin films International conference

K. Yoshimatsu, H. Kumigashira, A. Fujimori, M. Oshima

VUVX2010  2010 

Dimensional crossover induced metal-insulator transition in SrVO3 studied by in situ photoemission spectroscopy International conference

K. Yoshimatsu, T. Okabe, H. Kumigashira, S. Okamoto, S. Aizaki, A. Fujimori, M. Oshima

IWOX-VII  2009 

Thickness dependent electronic structure of La0.6Sr0.4MnO3 layer in SrTiO3/La0.6Sr0.4MnO3/SrTiO3 heterostructures studied by hard x-ray photoemission spectroscopy International conference

K. Yoshimatsu, K. Horiba, H. Kumigashira, E. Ikenaga, M. Oshima

AIST-RIKEN Joint WS on Emergent Phenomena of Correlated Materials""  2009 

終端制御SrTiO3/La0.6Sr0.4MnO3界面の硬X線光電子分光

吉松 公平, 堀場 弘司, 組頭 広志, 池永 英司, 尾嶋 正治

第22回日本放射光学会年会放射光科学合同シンポジウム  2009 

Bandwidth Controlled Metal-Insulator Transition in SrVO3 Thin Films International conference

K. Yoshimatsu, T. Okabe, H. Kumigashira, S. Okamoto, S. Aizaki, A. Fujimori, M. Oshima

The 16th International Workshop on Oxides Electronics  2009 

低次元化によりバンド幅制御したSrVO3薄膜の電子状態

吉松 公平, 岡部 崇志, 組頭 広志, 岡本 敏史, 相崎 真一, 藤森 淳, 尾嶋 正治

第64回日本物理学会年次大会  2009 

LaAlO3/SrTiO3界面のin situ 放射光光電子分光

吉松 公平, 安原 隆太郎, 組頭 広志, 尾嶋 正治

第21回日本放射光学会年会放射光科学合同シンポジウム  2008 

終端制御SrTiO3/La0.6Sr0.4MnO3界面の硬X線光電子分光

吉松 公平, 堀場弘司, 組頭 広志, 池永 英司, 尾嶋 正治

第63回日本物理学会年次大会  2008 

上部界面を制御したSrTiO3/La0.6Sr0.4MnO3/SrTiO3構造の硬X線光電子分光

吉松 公平, 堀場弘司, 組頭 広志, 池永 英司, 尾嶋 正治

第56回春季応用物理学会学術講演会  2008 

Electronic structure of the termination controlled SrTiO₃/La_0.6Sr_0.4MnO₃ interface studied by hard X-ray photoemission spectroscopy International conference

K. Yoshimatsu, K. Horiba, H. Kumigashira, E. Ikenaga, M. Oshima

The 15th International Workshop on Oxides Electronics  2008 

LaAlO3/SrTiO3界面電子状態の放射光光電子分光による解析 International conference

吉松 公平, 安原 隆太郎, 組頭 広志, 尾嶋 正治

第54回春季応用物理学会学術講演会  2007 

Electronic structure of the metallic interface between LaAlO3 and SrTiO3 studied by in situ photoemission spectroscopy International conference

K. Yoshimatsu, R. Yasuhara, H. Kumigashira, M. Oshima

The 14th International Workshop on Oxides Electronics  2007 

LaAlO3/SrTiO3界面金属層のin situ 放射光光電子分光

吉松 公平, 安原 隆太郎, 組頭 広志, 尾嶋 正治

第62回日本物理学会年次大会  2007 

Electronic structure at LaAlO3/SrTiO3 heterointerface studied by in situ photoemission spectroscopy International conference

K. Yoshimatsu, R. Yasuhara, H. Kumigashira, M. Oshima

2007 CERC International Symposium  2007 

第6回 応用物理学会薄膜・表面物理分科会 論文賞

2022.2   公益財団法人 応用物理学会 薄膜・表面物理分科会   “Thickness dependence of electronic structures in VO2 ultrathin films: Suppression of the cooperative Mott-Peierls transition”, Physical Review B 102, 115114 (2020).

志賀 大亮, Billy Eric Yang, 長谷川 直人, 神田 龍彦, 徳永 凌佑, 吉松 公平, 湯川 龍, 北村 未歩, 堀場 弘司, 組頭 広志

Outstanding Reviewer Award 2020

2021.4   IOP publishing   Outstanding Reviewer Award 2020 for Journal of Physics: Condensed Matter

K. Yoshimatsu

IOP trusted reviewer

2020.9   Institute of Physics  

Kohei Yoshimatsu

第60回原田研究奨励賞

2020.7   公益財団法人本多記念会   低酸化数を持つ酸化チタン薄膜の電子物性開拓

トーキン科学技術賞

2020.3   トーキン科学技術振興財団   低価数を示す酸化チタン薄膜の創生と新規電子物性開拓

top 100 read physics papers for Scientific Reports in 2017

2018.4   Scientific Reports   Superconductivity in Ti4O7 and g-Ti3O5 films

YOSHIMATSU Kohei

Poster Award

2017.7   3rd Functional Oxide Thin Films for Advanced Energy and Information Technology Conference   Superconductivity in higher titanium oxides

YOSHIMATSU Kohei

Presentation Award

2015.9   The Japan Society of Applied Physics   Superconductivity of gamma-type Ti3O5

YOSHIMATSU Kohei

Fun Research Award

2014.3   Funai Foundation  

YOSHIMATSU Kohei

Research Award

2014.1   The Japan Society for Synchrotron Research  

YOSHIMATSU Kohei

Presentation award for student

2012.1   The Japan Society for Synchrotron Research   Quantum well states of strongly correlated oxide of SrVO3

YOSHIMATSU Kohei

Development of inexpensive Hall effects measurement system using two-AC method

Grant number：20K20887  2020.7 - 2022.3

Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)  Grant-in-Aid for Challenging Research (Exploratory)

Kohei Yoshimatsu

薄膜格子歪みによるTi2O3の金属絶縁体転移制御と応用

2019.4 - 2022.3

日本学術振興会  基盤研究(B) 

吉松 公平

単純酸化物薄膜が創る複雑な構造・電子物性

2016.4 - 2019.3

日本学術振興会  若手研究 (A) 

吉松 公平

Development of electroactive materials through the analysis of electronic phase diagrams of epitaxial transition-metal oxides

Grant number：15H03881  2015.4 - 2018.3

Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

OHTOMO Akira, MATSUMOTO Yuji, KUMIGASHIRA Hiroshi, YOSHIMATSU Kohei, MASHIKO Hisanori, NAKAMURA Kentaro, KUROKAWA Hikaru, SOMA Takuto

強相関金属量子井戸構造による低次元伝導制御

2013.4 - 2015.3

日本学術振興会  研究活動スタート支援 

吉松 公平

Synthesis of photochemically active metal oxides having magnetic superstructures

Grant number：24245035  2012.4 - 2015.3

Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

OHTOMO Akira, KUMIGASHIRA Hiroshi, FUJIMORI Jun, OSHIMA Takayoshi, YOSHIMATSU Kohei

Creation of novel electronic states using strongly correlated quantum well structures

Grant number：12J10196  2012.4 - 2013.3

Japan Society for the Promotion Science  JSPS Research Fellowship for Young Scientists (DC1) 

YOSHIMATSU Kohei

Interface engineering of oxide heterojunctions with controlled termination structure based on synchrotron radiation analysis

Grant number：09J08463  2009.4 - 2012.3

Japan Society for the Promotion of Science  JSPS Research Fellowship for Young Scientists (DC1) 

YOSHIMATSU Kohei

School of Materials Science and Engineering Literacy

2024.4 Institution：Tokyo Institute of Technology

Applied chemistry experiment 1

2024.4 Institution：Tokyo Institute of Technology

Advanced electronic structures in solids II

2023.8 Institution：Tokyo Institute of Technology

研究プロジェクト（応用化学系）

2023.8 Institution：東京工業大学物質理工学院応用化学系

化学反応解析特論ⅣＢ

2022.4 - 2023.7 Institution：東北大学大学院理学研究科科学専攻

Exercises in Physical Chemistry B

2019.4 - 2023.7 Institution：Advanced Molecular Chemistry Course, Tohoku University

Basic Experiments

2018.10 - 2023.7 Institution：Advanced Molecular Chemistry Course, Tohoku University

Exercises in Physical Chemistry A

2018.10 - 2023.7 Institution：Advanced Molecular Chemistry Course, Tohoku University

Exercise in analytical chemistry

2013.4 - 2018.9 Institution：Department of Chemical Science and Engineering, Tokyo Institute of Technology

応用化学実験専門 （無機合成と機能: メータノールの水蒸気改質と水素燃料電池）

2013.4 - 2018.9 Institution：東京工業大学物資理工学院応用化学コース

応用化学実験第二 （フェライト合成と評価）

2013.4 - 2018.9 Institution：東京工業大学物質理工学院応用化学コース

リチウムイオン電池 超伝導状態を制御 Newspaper, magazine

日刊工業新聞社  日刊工業新聞  2015.11

超伝導 オン•オフ転換 低消費電力メモリーに道 Newspaper, magazine

日本経済新聞社  日経産業新聞  2015.11

強相関電子物質の薄膜積層 高温超伝導材 実現へ Newspaper, magazine

日刊工業新聞社  日刊工業新聞  2011.7

電子含む金属酸化物の膜 100原子層積み重ね技術 Newspaper, magazine

日経新聞社  日経産業新聞  2011.7