顔写真

PHOTO

Touhei Tetsuya
藤平　哲也
Touhei Tetsuya
藤平　哲也
Institutional repository
Graduate School of Engineering Science　Department of Systems Innovation, Associate Professor
Institutional repository

Research History 5

  1. 2017/04 - Present
    大阪大学大学院　基礎工学研究科システム創成専攻　准教授

  2. 2011/08 - 2017/03
    東京大学大学院　工学系研究科総合研究機構　助教

  3. 2007/07 - 2011/08
    東京大学大学院　工学系研究科総合研究機構　特任研究員（ナノテクノロジーネットワーク微細構造解析拠点）

  4. 2007/04 - 2007/07
    京都大学大学院　工学研究科　産学官連携研究員

  5. 2006/04 - 2007/03
    京都大学大学院　工学研究科　日本学術振興会特別研究員（PD）

Education 2

  1. 京都大学大学院　工学研究科　材料工学専攻

    2001/04 - 2006/03

  2. Kyoto University　Faculty of Engineering　School of Engineering Science

    1997/04 - 2001/03

Committee Memberships 1

  1. 応用物理学会関西支部幹事　Academic society

    2018/04 - 2020/03

Professional Memberships 4

  1. THE JAPAN SOCIETY OF APPLIED PHYSICS

  2. THE JAPANESE SOCIETY OF MICROSCOPY

  3. The Ceramic Society of Japan

  4. 日本金属学会

Research Areas 3

  1. Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electric/electronic material engineering /

  2. Nanotechnology/Materials / Metallic materials /

  3. Nanotechnology/Materials / Inorganic materials /

Awards 8

  1. 日本セラミックス協会 第47回学術写真賞 特別賞

    栗谷淳、藤平哲也*、林侑介、宇佐美茂佳、今西正幸、森勇介、酒井朗、滝野淳一、隅智亮、岡山芳央　2022/07

  2. 日本セラミックス協会 井関孝善賞

    藤平哲也　2016/11

  3. 日本金属学会金属組織写真賞 最優秀賞

    2015/03

  4. 日本セラミックス協会学術写真賞 最優秀賞

    2015/03

  5. 5th International Conference on the Science and Technology for Advanced Ceramics (STAC5) 最優秀ポスター賞

    2011/06

  6. 日本セラミックス協会学術写真賞 優秀賞

    2011/04

  7. 27th Korea-Japan International Seminar on Ceramics, Young Ceramist Best Presentation Award 2010

    2010/11

  8. 第19回日本MRS学術シンポジウム奨励賞

    2009/12

Papers 83

  1. Molecular beam homoepitaxy of N-polar AlN: Enabling role of aluminum-assisted surface cleaning

    Zexuan Zhang, Yusuke Hayashi, Tetsuya Tohei, Akira Sakai, Vladimir Protasenko, Jashan Singhal, Hideto Miyake, Huili Grace Xing, Debdeep Jena, YongJin Cho

    Science Advances　Vol. 8　No. 36　2022/09/09　Research paper (scientific journal)

    Publisher: American Association for the Advancement of Science (AAAS)

  2. Versatile Functionality of Four-Terminal TiO2-x Memristive Devices as Artificial Synapses for Neuromorphic Computing

    Ryotaro Miyake, Zenya Nagata, Kenta Adachi, Yusuke Hayashi, Tetsuya Tohei, Akira Sakai

    ACS APPLIED ELECTRONIC MATERIALS　Vol. 4　No. 5　p. 2326-2336　2022/05　Research paper (scientific journal)

  3. Breaking of Thermopower–Conductivity Trade-Off in LaTiO3 Film around Mott Insulator to Metal Transition

    Katase, T., He, X., Tadano, T., Tomczak, J.M., Onozato, T., Ide, K., Feng, B., Tohei, T., Hiramatsu, H., Ohta, H., Ikuhara, Y., Hosono, H., Kamiya, T.

    Advanced Science　Vol. 8　No. 23　p. 2102097-1-2102097-8　2021/10　Research paper (scientific journal)

  4. Analysis of inverse-piezoelectric-effect-induced lattice deformation in AlGaN/GaN high-electron-mobility transistors by time-resolved synchrotron radiation nanobeam X-ray diffraction

    Haruna Shiomi, Akira Ueda, Tetsuya Tohei, Yasuhiko Imai, Takeaki Hamachi, Kazushi Sumitani, Shigeru Kimura, Yuji Ando, Tamotsu Hashizume, Akira Sakai

    Applied Physics Express　Vol. 14　No. 9　p. 095502-1-095502-6　2021/09/01　Research paper (scientific journal)

    Publisher: IOP Publishing

  5. Propagation of threading dislocations and effects of Burgers vectors in HVPE-grown GaN bulk crystals on Na-flux-grown GaN substrates

    T. Hamachi, T. Tohei, Y. Hayashi, M. Imanishi, S. Usami, Y. Mori, N. Ikarashi, A. Sakai

    Journal of Applied Physics　Vol. 129　No. 22　p. 225701-225701　2021/06/14　Research paper (scientific journal)

    Publisher: AIP Publishing

  6. Fabrication of GaO x based crossbar array memristive devices and their resistive switching properties

    Joko, M., Hayashi, Y., Tohei, T., Sakai, A.

    Japanese Journal of Applied Physics　Vol. 59　No. SM　p. SMMC03-SMMC03　2020/07/01　Research paper (scientific journal)

    Publisher: IOP Publishing

  7. Author Correction: Gate Tuning of Synaptic Functions Based on Oxygen Vacancy Distribution Control in Four-Terminal TiO2−x Memristive Devices (Scientific Reports, (2019), 9, 1, (10013), 10.1038/s41598-019-46192-x)

    Nagata, Z., Shimizu, T., Isaka, T., Tohei, T., Ikarashi, N., Sakai, A.

    Scientific Reports　Vol. 9　No. 1　2019/07　Research paper (scientific journal)

  8. Correlation between current leakage and structural properties of threading dislocations in GaN bulk single crystals grown using a Na-flux method

    Hamachi, T., Tohei, T., Imanishi, M., Mori, Y., Sakai, A.

    Japanese Journal of Applied Physics　Vol. 58　No. SC　2019/05　Research paper (scientific journal)

  9. Demonstrative operation of four-terminal memristive devices fabricated on reduced TiO 2 single crystals

    Takeuchi, S., Shimizu, T., Isaka, T., Tohei, T., Ikarashi, N., Sakai, A.

    Scientific Reports　Vol. 9　No. 1　2019/02　Research paper (scientific journal)

  10. Analysis of Ti valence states in resistive switching regions of a rutile TiO2-x four-terminal memristive device

    Kengo Yamaguchi, Shotaro Takeuchi, Tetsuya Tohei, Nobuyuki Ikarashi, Akira Sakai

    Japanese Journal of Applied Physics　Vol. 57　No. 6　2018/06/01　Research paper (international conference proceedings)

    Publisher: Japan Society of Applied Physics

  11. Leakage current analysis for dislocations in Na-flux GaN bulk single crystals by conductive atomic force microscopy

    T. Hamachi, S. Takeuchi, T. Tohei, M. Imanishi, M. Imade, Y. Mori, A. Sakai

    Journal of Applied Physics　Vol. 123　No. 16　p. 161417-161417　2018/04/28　Research paper (scientific journal)

    Publisher: AIP Publishing

  12. First principles calculation of thermal expansion coefficients of pure and Cr doped alpha-alumina crystals

    Tetsuya Tohei, Yuito Watanabe, Hak-Sung Lee, Yuichi Ikuhara

    JOURNAL OF APPLIED PHYSICS　Vol. 120　No. 14　2016/10　Research paper (scientific journal)

  13. First principles study of oxygen diffusion in a alpha-alumina {10(1)over-bar1} twin grain boundary

    Tetsuya Tohei, Yuito Watanabe, Nobuaki Takahashi, Tsubasa Nakagawa, Naoya Shibata, Yuichi Ikuhara

    PHILOSOPHICAL MAGAZINE　Vol. 95　No. 35　p. 3985-3999　2015/12　Research paper (scientific journal)

  14. First Principles Calculation of Thermal Expansion of Carbon and Boron Nitrides Based on Quasi-Harmonic Approximation

    Tetsuya Tohei, Hak-Sung Lee, Yuichi Ikuhara

    MATERIALS TRANSACTIONS　Vol. 56　No. 9　p. 1452-1456　2015/09　Research paper (scientific journal)

  15. Double Columnar Structure with a Nanogradient Composite for Increased Oxygen Diffusivity and Reduction Activity

    Young-Wan Ju, Junji Hyodo, Atsushi Inoishi, Shintaro Ida, Tetsuya Tohei, Yeong-Gi So, Yuichi Ikuhara, Tatsumi Ishihara

    ADVANCED ENERGY MATERIALS　Vol. 4　No. 17　2014/12　Research paper (scientific journal)

  16. Large magnetoelectric coupling in magnetically short-range ordered Bi5Ti3FeO15 film

    Hongyang Zhao, Hideo Kimura, Zhenxiang Cheng, Minoru Osada, Jianli Wang, Xiaolin Wang, Shixue Dou, Yan Liu, Jianding Yu, Takao Matsumoto, Tetsuya Tohei, Naoya Shibata, Yuichi Ikuhara

    SCIENTIFIC REPORTS　Vol. 4　2014/06　Research paper (scientific journal)

  17. Fluorine in Shark Teeth: Its Direct Atomic-Resolution Imaging and Strengthening Function

    Chunlin Chen, Zhongchang Wang, Mitsuhiro Saito, Tetsuya Tohei, Yoshiro Takano, Yuichi Ikuhara

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　Vol. 53　No. 6　p. 1543-1547　2014/02　Research paper (scientific journal)

  18. A New Layered Iron Arsenide Superconductor: (Ca,Pr)FeAs2

    Hiroyuki Yakita, Hiraku Ogino, Tomoyuki Okada, Akiyasu Yamamoto, Kohji Kishio, Tetsuya Tohei, Yuichi Ikuhara, Yoshito Gotoh, Hiroshi Fujihisa, Kunimitsu Kataoka, Hiroshi Eisaki, Jun-ichi Shimoyama

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　Vol. 136　No. 3　p. 846-849　2014/01　Research paper (scientific journal)

  19. Multivariate Statistical Characterization of Charged and Uncharged Domain Walls in Multiferroic Hexagonal YMnO3 Single Crystal Visualized by a Spherical Aberration-Corrected STEM

    Takao Matsumoto, Ryo Ishikawa, Tetsuya Tohei, Hideo Kimura, Qiwen Yao, Hongyang Zhao, Xiaolin Wang, Dapeng Chen, Zhenxiang Cheng, Naoya Shibata, Yuichi Ikuhara

    NANO LETTERS　Vol. 13　No. 10　p. 4594-4601　2013/10　Research paper (scientific journal)

  20. Interface atomic structure of LaCuOSe:Mg epitaxial thin film and MgO substrate

    Tetsuya Tohei, Teruyasu Mizoguchi, Hidenori Hiramatsu, Hideo Hosono, Yuichi Ikuhara

    MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS　Vol. 173　No. 1-3　p. 229-233　2010/10　Research paper (scientific journal)

  21. Direct imaging of doped fluorine in LaFeAsO1-XFX superconductor by atomic scale spectroscopy

    Tetsuya Tohei, Teruyasu Mizoguchi, Hidenori Hiramatsu, Yoichi Kamihara, Hideo Hosono, Yuichi Ikuhara

    APPLIED PHYSICS LETTERS　Vol. 95　No. 19　2009/11　Research paper (scientific journal)

  22. Geometric ferroelectricity in rare-earth compounds RGaO3 and RInO3

    Tetsuya Tohei, Hiroki Moriwake, Hidenobu Murata, Akihide Kuwabara, Ryo Hashimoto, Tomoyuki Yamamoto, Isao Tanaka

    PHYSICAL REVIEW B　Vol. 79　No. 14　2009/04　Research paper (scientific journal)

  23. Debye temperature and stiffness of carbon and boron nitride polymorphs from first principles calculations

    T Tohei, A Kuwabara, F Oba, Tanaka, I

    PHYSICAL REVIEW B　Vol. 73　No. 6　2006/02　Research paper (scientific journal)

  24. Ab initio lattice dynamics and phase transformations of ZrO2

    A Kuwabara, T Tohei, T Yamamoto, Tanaka, I

    PHYSICAL REVIEW B　Vol. 71　No. 6　2005/02　Research paper (scientific journal)

  25. General rule for displacive phase transitions in perovskite compounds revisited by first principles calculations

    T Tohei, A Kuwabara, T Yamamoto, F Oba, Tanaka, I

    PHYSICAL REVIEW LETTERS　Vol. 94　No. 3　2005/01　Research paper (scientific journal)

  26. Negative magnetocaloric effect at the antiferromagnetic to ferromagnetic transition of Mn3GaC

    T Tohei, H Wada, T Kanomata

    JOURNAL OF APPLIED PHYSICS　Vol. 94　No. 3　p. 1800-1802　2003/08　Research paper (scientific journal)

  27. Revealing crystallographically distinct growth sectors in Na-flux GaN via machine learning-assisted nanobeam x-ray diffraction analysis

    Zhendong Wu, Tetsuya Tohei, Masayuki Imanishi, Yusuke Mori, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura, Akira Sakai

    APL Machine Learning　2025/09/01　Research paper (scientific journal)

  28. In situ nanobeam x-ray diffraction of local strain in AlGaN/GaN high-electron-mobility transistors under operating condition

    Akihiro Shimada, Haruna Shiomi, Tetsuya Tohei, Yusuke Hayashi, Masaya Yamaguchi, Junpei Yamamoto, Takeaki Hamachi, Yasuhiko Imai, Kazushi Sumitani, Shigeru Kimura, Shota Kaneki, Tamotsu Hashizume, Akira Sakai

    Journal of Applied Physics　2025/08/21　Research paper (scientific journal)

  29. Anchor point based image registration for absolute scale topographic structure detection in microscopy

    Zhuo Diao, Zijie Meng, Fengxuan Li, Linfeng Hou, Hayato Yamashita, Tetsuya Tohei, Masayuki Abe, Akira Sakai

    Scientific Reports　Vol. 15　No. 1　2025/04/18　Research paper (scientific journal)

    Publisher: Springer Science and Business Media LLC

  30. Enhancing memristor multilevel resistance state with linearity potentiation via the feedforward pulse scheme

    Zhuo Diao, Ryohei Yamamoto, Zijie Meng, Tetsuya Tohei, Akira Sakai

    Nanoscale Horizons　Vol. 10　No. 4　p. 780-790　2025/02　Research paper (scientific journal)

    Publisher: Royal Society of Chemistry (RSC)

  31. Analysis of local strain fields around individual threading dislocations in GaN substrates by nanobeam x-ray diffraction

    T. Hamachi, T. Tohei, Y. Hayashi, S. Usami, M. Imanishi, Y. Mori, K. Sumitani, Y. Imai, S. Kimura, A. Sakai

    Journal of Applied Physics　Vol. 135　No. 22　2024/06/11　Research paper (scientific journal)

    Publisher: AIP Publishing

  32. Local strain distribution analysis in strained SiGe spintronics devices

    Tomoki Onabe, Zhendong Wu, Tetsuya Tohei, Yusuke Hayashi, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura, Takahiro Naito, Kohei Hamaya, Akira Sakai

    Japanese Journal of Applied Physics　Vol. 63　No. 2　2024/02/29　Research paper (scientific journal)

  33. Conduction mechanism of Schottky contacts fabricated on etch pits originating from single threading dislocation in a highly Si-doped HVPE GaN substrate

    Toshikazu Sato, Takeaki Hamachi, Tetsuya Tohei, Yusuke Hayashi, Masayuki Imanishi, Shigeyoshi Usami, Yusuke Mori, Akira Sakai

    Materials Science in Semiconductor Processing　Vol. 167　2023/11/15　Research paper (scientific journal)

  34. Micro- and Nanostructure Analysis of Vapor-Phase-Grown AlN on Face-to-Face Annealed Sputtered AlN/Nanopatterned Sapphire Substrate Templates

    Yudai Nakanishi, Yusuke Hayashi, Takeaki Hamachi, Tetsuya Tohei, Yoshikata Nakajima, Shiyu Xiao, Kanako Shojiki, Hideto Miyake, Akira Sakai

    Journal of Electronic Materials　2023/03/29　Research paper (scientific journal)

    Publisher: Springer Science and Business Media LLC

  35. Comprehensive analysis of current leakage at individual screw and mixed threading dislocations in freestanding GaN substrates

    Takeaki Hamachi, Tetsuya Tohei, Yusuke Hayashi, Masayuki Imanishi, Shigeyoshi Usami, Yusuke Mori, Akira Sakai

    Scientific Reports　Vol. 13　No. 1　2023/02/10　Research paper (scientific journal)

    Publisher: Springer Science and Business Media LLC

  36. High-temperature operation of gallium oxide memristors up to 600 K

    Kento Sato, Yusuke Hayashi, Naoki Masaoka, Tetsuya Tohei, Akira Sakai

    Scientific Reports　Vol. 13　No. 1　2023/01/30　Research paper (scientific journal)

    Publisher: Springer Science and Business Media LLC

  37. Interface engineering of amorphous gallium oxide crossbar array memristors for neuromorphic computing

    Naoki Masaoka, Yusuke Hayashi, Tetsuya Tohei, Akira Sakai

    Japanese Journal of Applied Physics　Vol. 62　No. SC　p. SC1035-SC1035　2023/01/24　Research paper (scientific journal)

    Publisher: IOP Publishing

  38. Gate-tunable plasticity in artificial synaptic devices based on four-terminal amorphous gallium oxide memristors

    Taishi Ikeuchi, Yusuke Hayashi, Tetsuya Tohei, Akira Sakai

    Applied Physics Express　Vol. 16　No. 1　p. 015509-015509　2023/01/01　Research paper (scientific journal)

    Publisher: IOP Publishing

  39. Thermal strain analysis considering in-plane anisotropy for sputtered AlN on c- And a-plane sapphire under high-temperature annealing

    Hayashi, Y., Uesugi, K., Shojiki, K., Tohei, T., Sakai, A., Miyake, H.

    AIP Advances　Vol. 11　No. 9　p. 095012-095012　2021/09/01　Research paper (scientific journal)

    Publisher: AIP Publishing

  40. Local piezoelectric properties in Na-flux GaN bulk single crystals

    A. Ueda, T. Hamachi, A. Okazaki, S. Takeuchi, T. Tohei, M. Imanishi, M. Imade, Y. Mori, A. Sakai

    Journal of Applied Physics　Vol. 128　No. 12　p. 125110-125110　2020/09/28　Research paper (scientific journal)

    Publisher: AIP Publishing

  41. Local current leakage at threading dislocations in GaN bulk single crystals grown by a modified Na-flux method

    Hamachi, T., Tohei, T., Imanishi, M., Mori, Y., Sakai, A.

    Japanese Journal of Applied Physics　Vol. 58　No. 5　2019/04　Research paper (scientific journal)

  42. Quantitative analysis of lattice plane microstructure in the growth direction of a modified na-flux gan crystal using nanobeam X-ray diffraction

    Shida, K., Yamamoto, N., Tohei, T., Imanishi, M., Mori, Y., Sumitani, K., Imai, Y., Kimura, S., Sakai, A.

    Japanese Journal of Applied Physics　Vol. 58　No. SC　2019/04　Research paper (scientific journal)

  43. Depth-resolved analysis of lattice distortions in high-Ge-content SiGe/compositionally graded SiGe films using nanobeam x-ray diffraction

    Kazuki Shida, Shotaro Takeuchi, Tetsuya Tohei, Yasuhiko Imai, Shigeru Kimura, Andreas Schulze, Matty Caymax, Akira Sakai

    Semiconductor Science and Technology　Vol. 33　No. 12　p. 124005-124005　2018/12/01　Research paper (scientific journal)

    Publisher: IOP Publishing

  44. Local electrical and structural analysis for threading dislocations in the modified Na-flux GaN bulk single crystals

    T. Hamachi, T. Tohei, M. Imanishi, Y. Mori, A. Sakai

    2018/11　Research paper (international conference proceedings)

  45. Facile Synthesis Route of Au-Ag Nanostructures Soaked in PEG

    E. K. Fodjo, A. Canlier, C. Kong, A. Yurtsever, P. L. A. Guillaume, F. T. Patrice, M. Abe, T. Tohei, A. Sakai

    Advances in Nanoparticles　2018/07　Research paper (scientific journal)

  46. Inversion domain network stabilization and spinel phase suppression in ZnO

    Joshua Hoemke, Eita Tochigi, Tetsuya Tohei, Hidehiro Yoshida, Naoya Shibata, Yuichi Ikuhara, Yoshio Sakka

    Journal of the American Ceramic Society　Vol. 101　No. 6　p. 2616-2626　2018/06　Research paper (scientific journal)

  47. Tomographic mapping analysis of lattice distortions in the depth direction of high-Ge-content SiGe films with compositionally graded buffer layers using nanobeam X-ray diffraction

    K. Shida, S. Takeuchi, T. Tohei, Y. Imai, S. Kimura, A. Schulze, M. Caymax, A. Sakai

    2018/05　Research paper (international conference proceedings)

  48. Microstructural analysis in the depth direction of a heteroepitaxial AlN thick film grown on a trench-patterned template by nanobeam X-ray diffraction

    K. Shida, S. Takeuchi, T. Tohei, H. Miyake, K. Hiramatsu, K. Sumitani, Y. Imai, S. Kimura, A. Sakai

    Journal of Applied Physics　Vol. 123　No. 16　p. 161563-161563　2018/04/28　Research paper (scientific journal)

    Publisher: AIP Publishing

  49. Demonstrative operation of four-terminal memristive devices by controlling oxygen vacancy distribution in TiO2-x single crystals

    Akira Sakai, Takuma Shimizu, Masato Shimotani, Shotaro Takeuchi, Tetsuya Tohei

    2018/04

  50. Nanobeam X-ray diffraction analysis of lattice deformation in thin nano-indented single crystal Si wafers

    Y. Mametsuka, S. Takeuchi, T. Tohei, K. Sumitani, Y. Imai, S. Kimura, J. Fujise, T. Ono, A. Sakai

    2018/01

  51. Leakage current analysis in GaN-on-GaN p-n diode by conductive atomic force microscopy

    S. Mizutani, T. Hamachi, S. Takeuchi, T. Tohei, T. Kachi, S. Sarayama, A. Sakai

    2018/01

  52. Valence state analysis of Ti in resistive switching region of rutile TiO2-x single crystals memristor

    Kengo Yamaguchi, Shotaro Takeuchi, Takuma Shimizu, Tetsuya Tohei, Nobuyuki Ikarasi, Akira Sakai

    2017/09　Research paper (international conference proceedings)

  53. Inversion domain boundaries in Mn and Al dual-doped ZnO: Atomic structure and electronic properties

    Joshua Hoemke, Eita Tochigi, Tetsuya Tohei, Hidehiro Yoshida, Naoya Shibata, Yuichi Ikuhara, Yoshio Sakka

    Journal of the American Ceramic Society　Vol. 100　No. 9　p. 4252-4262　2017/09　Research paper (scientific journal)

  54. Ferroelectric domains and phase evolution in (Fe:) KTa <inf>1−x</inf> Nb <inf>x</inf> O <inf>3</inf> crystals

    Hongyang Zhao, Kang Cai, Ziran Fan, Zhideng Huang, Zhibin Ma, Tingting Jia, Hideo Kimura, Yuguo Yang, Takao Matsumoto, Tetsuya Tohei, Naoya Shibata, Yuichi Ikuhara

    Applied Surface Science　Vol. 413　p. 1-6　2017/08/15　Research paper (scientific journal)

  55. Thermoelectric phase diagram of the SrTiO3-SrNbO3 solid solution system

    Yuqiao Zhang, Bin Feng, Hiroyuki Hayashi, Tetsuya Tohei, Isao Tanaka, Yuichi Ikuhara, Hiromichi Ohta

    JOURNAL OF APPLIED PHYSICS　Vol. 121　No. 18　2017/05　Research paper (scientific journal)

  56. Reactive Solid-Phase Epitaxy and Electrical Conductivity of Layered Sodium Manganese Oxide Films

    Shota Katayama, Takayoshi Katase, Tetsuya Tohei, Bin Feng, Yuichi Ikuhara, Hiromichi Ohta

    CRYSTAL GROWTH & DESIGN　Vol. 17　No. 4　p. 1849-1853　2017/04　Research paper (scientific journal)

  57. A Novel Class of Multiferroic Material, Bi4Ti3O12 center dot nBiFeO(3) with Localized Magnetic Ordering Evaluated from Their Single Crystals

    Hongyang Zhao, Kang Cai, Zhenxiang Cheng, Tingting Jia, Hideo Kimura, Zhibin Ma, Qiuming Fu, Zhideng Huang, Takao Matsumoto, Tetsuya Tohei, Naoya Shibata, Yuichi Ikuhara

    ADVANCED ELECTRONIC MATERIALS　Vol. 3　No. 1　2017/01　Research paper (scientific journal)

  58. Atomic structures of a liquid-phase bonded metal/nitride heterointerface

    Akihito Kumamoto, Naoya Shibata, Kei-ichiro Nayuki, Tetsuya Tohei, Nobuyuki Terasaki, Yoshiyuki Nagatomo, Toshiyuki Nagase, Kazuhiro Akiyama, Yoshirou Kuromitsu, Yuichi Ikuhara

    SCIENTIFIC REPORTS　Vol. 6　2016/03　Research paper (scientific journal)

  59. Atom-resolved STEM-EDS Mapping of a Liquid-phase Bonded Metal/Nitride Heterointerface

    Kumamoto Akihito, Shibata Naoya, Nayuki Kei-ichiro, Tohei Tetsuya, Ikuhara Yuichi, Terasaki Nobuyuki, Nagatomo Yoshiyuki, Nagase Toshiyuki, Akiyama Kazuhiro, Kuromitsu Yoshirou

    Materia Japan　Vol. 55　No. 12　p. 611-611　2016

    Publisher: The Japan Institute of Metals and Materials

  60. Microstructures and improved J(c)-H characteristics of Cl-containing YBCO thin films prepared by the fluorine-free MOD method

    Takanori Motoki, Jun-ichi Shimoyama, Hiraku Ogino, Kohji Kishio, Jiyoung Roh, Tetsuya Tohei, Yuichi Ikuhara, Shigeru Horii, Toshiya Doi, Genki Honda, Tatsuoki Nagaishi

    SUPERCONDUCTOR SCIENCE & TECHNOLOGY　Vol. 29　No. 1　2016/01　Research paper (scientific journal)

  61. Solid-Phase Epitaxial Growth of A-Site-Ordered Perovskite Sr4-xErxCo4O12-delta: A Room Temperature Ferrimagnetic p-Type Semiconductor

    Takayoshi Katase, Hidefumi Takahashi, Tetsuya Tohei, Yuki Suzuki, Michihiko Yamanouchi, Yuichi Ikuhara, Ichiro Terasaki, Hiromichi Ohta

    ADVANCED ELECTRONIC MATERIALS　Vol. 1　No. 12　2015/12　Research paper (scientific journal)

  62. Room-Temperature-Protonation-Driven On-Demand Metal-Insulator Conversion of a Transition Metal Oxide

    Takayoshi Katase, Kenji Endo, Tetsuya Tohei, Yuichi Ikuhara, Hiromichi Ohta

    ADVANCED ELECTRONIC MATERIALS　Vol. 1　No. 7　2015/07　Research paper (scientific journal)

  63. Phase Boundary Structure of LixFePO4 Cathode Material Revealed by Atomic-Resolution Scanning Transmission Electron Microscopy

    Akiho Nakamura, Sho Furutsuki, Shin-ichi Nishimura, Tetsuya Tohei, Yukio Sato, Naoya Shibata, Atsuo Yamada, Yuichi Ikuhara

    CHEMISTRY OF MATERIALS　Vol. 26　No. 21　p. 6178-6184　2014/11　Research paper (scientific journal)

  64. Titanium enrichment and strontium depletion near edge dislocation in strontium titanate [001]/(110) low-angle tilt grain boundary

    K. Takehara, Y. Sato, T. Tohei, N. Shibata, Y. Ikuhara

    JOURNAL OF MATERIALS SCIENCE　Vol. 49　No. 11　p. 3962-3969　2014/06　Research paper (scientific journal)

  65. Synthesis of string-bean-like anisotropic titania nanoparticles with basic amino acids

    Junzheng Wang, John K. Katahara, Akihito Kumamoto, Tetsuya Tohei, Ayae Sugawara-Narutaki, Atsushi Shimojima, Tatsuya Okubo

    RSC ADVANCES　Vol. 4　No. 18　p. 9233-9235　2014　Research paper (scientific journal)

  66. Determination of Exact Positions of Individual Tungsten Atoms in Unisize Tungsten Oxide Clusters Supported on Carbon Substrate by HAADF-STEM Observation

    Hisato Yasumatsu, Tetsuya Tohei, Yuichi Ikuhara

    JOURNAL OF PHYSICAL CHEMISTRY C　Vol. 118　No. 3　p. 1706-1711　2014/01　Research paper (scientific journal)

  67. First principles calculation of dopant solution energy in HfO2 polymorphs

    M. Saitoh, T. Mizoguchi, T. Tohei, Y. Ikuhara

    JOURNAL OF APPLIED PHYSICS　Vol. 112　No. 8　2012/10　Research paper (scientific journal)

  68. Nanowire of hexagonal gallium oxynitride: Direct observation of its stacking disorder and its long nanowire growth

    Yuji Masubuchi, Ryohei Yamaoka, Tetsuya Tohei, Teruyasu Mizoguchi, Yuichi Ikuhara, Shinichi Kikkawa

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　Vol. 32　No. 9　p. 1989-1993　2012/07　Research paper (scientific journal)

  69. Chain-like nanostructures from anisotropic self-assembly of semiconducting metal oxide nanoparticles with a block copolymer

    Junzheng Wang, Suminto Winardi, Ayae Sugawara-Narutaki, Akihito Kumamoto, Tetsuya Tohei, Atsushi Shimojima, Tatsuya Okubo

    CHEMICAL COMMUNICATIONS　Vol. 48　No. 90　p. 11115-11117　2012　Research paper (scientific journal)

  70. First-principles Calculations of the Phase Transition in CaTiO3 under Negative Static Pressure

    Hiroki Moriwake, Craig A. J. Fisher, Akihide Kuwabara, Tetsuya Tohei, Isao Tanaka

    JOURNAL OF THE KOREAN PHYSICAL SOCIETY　Vol. 59　No. 3　p. 2497-2502　2011/09　Research paper (scientific journal)

  71. A new iron pnictide oxide (Fe2As2)(Ca-5(Mg, Ti)(4)O-y) and a new phase in the Fe-As-Ca-Mg-Ti-O system

    Hiraku Ogino, Yasuaki Shimizu, Naoto Kawaguchi, Kohji Kishio, Jun-ichi Shimoyama, Tetsuya Tohei, Yuichi Ikuhara

    SUPERCONDUCTOR SCIENCE & TECHNOLOGY　Vol. 24　No. 8　2011/08　Research paper (scientific journal)

  72. TEM observation of liquid-phase bonded aluminum-silicon/aluminum nitride hetero interface

    Christine Marie Montesa, Naoya Shibata, Tetsuya Tohei, Yuichi Ikuhara

    JOURNAL OF MATERIALS SCIENCE　Vol. 46　No. 12　p. 4392-4396　2011/06　Research paper (scientific journal)

  73. Structures of a Sigma=9, [110]/{221} symmetrical tilt grain boundary in SrTiO3

    T. Mitsuma, T. Tohei, N. Shibata, T. Mizoguchi, T. Yamamoto, Y. Ikuhara

    JOURNAL OF MATERIALS SCIENCE　Vol. 46　No. 12　p. 4162-4168　2011/06　Research paper (scientific journal)

  74. A new homologous series of iron pnictide oxide superconductors (Fe2As2)(Can+2(Al, Ti)(n)O-y) (n=2, 3, 4)

    Hiraku Ogino, Kenji Machida, Akiyasu Yamamoto, Kohji Kishio, Jun-ichi Shimoyama, Tetsuya Tohei, Yuichi Ikuhara

    SUPERCONDUCTOR SCIENCE & TECHNOLOGY　Vol. 23　No. 11　2010/11　Research paper (scientific journal)

  75. Cr diffusion in alpha-Al2O3: Secondary ion mass spectroscopy and first-principles study

    Nobuaki Takahashi, Teruyasu Mizoguchi, Tsubasa Nakagawa, Tetsuya Tohei, Isao Sakaguchi, Akihide Kuwabara, Naoya Shibata, Takahisa Yamamoto, Naoki Ohashi, Yuichi Ikuhara

    PHYSICAL REVIEW B　Vol. 82　No. 17　2010/11　Research paper (scientific journal)

  76. Origins of Hole Doping and Relevant Optoelectronic Properties of Wide Gap p-Type Semiconductor, LaCuOSe

    Hidenori Hiramatsu, Toshio Kamiya, Tetsuya Tohei, Eiji Ikenaga, Teruyasu Mizoguchi, Yuichi Ikuhara, Keisuke Kobayashi, Hideo Hosono

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　Vol. 132　No. 42　p. 15060-15067　2010/10　Research paper (scientific journal)

  77. Application of coincidence of reciprocal lattice point model to metal/sapphire hetero interfaces

    Christine Marie Montesa, Naoya Shibata, Tetsuya Tohei, Kazuhiro Akiyama, Yoshirou Kuromitsu, Yuichi Ikuhara

    MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS　Vol. 173　No. 1-3　p. 234-238　2010/10　Research paper (scientific journal)

  78. Homologous series of iron pnictide oxide superconductors (Fe2As2)x[Can+1(Sc,Ti)(n)O-y] (n=3,4,5) with extremely thick blocking layers

    Hiraku Ogino, Shinya Sato, Kohji Kishio, Jun-ichi Shimoyama, Tetsuya Tohei, Yuichi Ikuhara

    APPLIED PHYSICS LETTERS　Vol. 97　No. 7　2010/08　Research paper (scientific journal)

  79. First Principles Calculations of Vacancy Formation Energies in Sigma 13 Pyramidal Twin Grain Boundary of alpha-Al2O3

    Nobuaki Takahashi, Teruyasu Mizoguchi, Tetsuya Tohei, Kaoru Nakamura, Tsubasa Nakagawa, Naoya Shibata, Takahisa Yamamoto, Yuichi Ikuhara

    MATERIALS TRANSACTIONS　Vol. 50　No. 5　p. 1019-1022　2009/05　Research paper (scientific journal)

  80. Square-shape magnetocaloric effect in Mn3GaC

    R Burriel, L Tocado, E Palacios, T Tohei, H Wada

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　Vol. 290　p. 715-718　2005/04　Research paper (scientific journal)

  81. Change in the character of magnetocaloric effect with Ni substitution in Ho(Co1-xNix)(2)

    T Tohei, H Wada

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　Vol. 280　No. 1　p. 101-107　2004/09　Research paper (scientific journal)

  82. Large magnetocaloric effect of Mn3-xCoxGaC

    T. Tohei, H. Wada, T. Kanomata

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS　Vol. 272　p. E585-E586　2004/05　Research paper (scientific journal)

  83. Relativistic multiplet calculations of absorption spectra for rare-earth-based solid-state laser materials

    K Fujimura, T Tohei, T Ishii, K Ogasawara, Tanaka, I, H Adachi

    PRICM 4: FORTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, VOLS I AND II　p. 583-585　2001　Research paper (international conference proceedings)

Misc. 58

  1. In situ time-resolved synchrotron radiation nanobeam X-ray diffraction analysis of inverse-piezoelectric-effect-induced lattice deformation in AlGaN/GaN high-electron-mobility transistors

    Tetsuya Tohei, Yasuhiko Imai, Akira Saka

    SPring-8 /SACLA Research Frontiers 2021　p. 40-41　2022/08　Internal/External technical report, pre-print, etc.

  2. Analysis of local strain fields around individual threading dislocations in HVPE-GaN bulk crystals by using nanobeam X-Ray diffraction

    濱地威明, 藤平哲也, 林侑介, 宇佐美茂佳, 今西正幸, 森勇介, 隅谷和嗣, 今井康彦, 木村滋, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  3. Depth-resolved tomographic analysis on thick AlN films grown on NPSS using nanobeam X-ray diffraction

    山本望, 林侑介, 濱地威明, 中西悠太, 藤平哲也, 隅谷和嗣, 今井康彦, 木村滋, 正直花奈子, 三宅秀人, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  4. Gate-controlled modulation of synaptic properties in 4-terminal planar TiO2-x memristive devices

    安達健太, 林侑介, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  5. Development and resistive switching properties of four-terminal planer amorphous GaOx memristive devices

    池内太志, 林侑介, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  6. Operand analysis of local piezoelectric lattice deformation in AlGaN/GaN HEMT devices by synchrotron radiation nanobeam X-ray diffraction

    塩見春奈, 嶋田章宏, 藤平哲也, 林侑介, 金木奨太, 橋詰保, 今井康彦, 隅谷和嗣, 木村滋, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  7. Structure analysis of OVPE-grown GaN crystals by using nanobeam X-ray diffraction

    栗谷淳, 藤平哲也, 濱地威明, 林侑介, 滝野淳一, 隅智亮, 宇佐美茂佳, 今西正幸, 森勇介, 隅谷和嗣, 今井康彦, 木村滋, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  8. Crystalline microstructure and electric property of four-terminals oxide memristors

    藤平哲也, 三宅亮太郎, 谷口奈穂, 上甲守治, 林侑介, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 68th　2021

  9. Atomic Scale Mechanism of Novel Oxide-based Memristor and Fabrication of Diversified Synaptic Device

    藤平哲也, 酒井朗

    村田学術振興財団年報　No. 34　2020

  10. First-principles analysis of oxygen vacancy behavior in rutile TiO2 under external electric fields

    井阪健, 藤平哲也, 林侑介, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 67th　2020

  11. Thermal Strain Analysis on High-Temperature-Annealed Sputtered AlN

    林侑介, 上杉謙次郎, 正直花奈子, 三宅秀人, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 67th　2020

  12. Investigation of morphology and current leakage properties for individual threading dislocations in a HVPE-GaN bulk single crystal grown on a Na-flux-GaN crystal

    濱地威明, 藤平哲也, 林侑介, 今西正幸, 森勇介, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 67th　2020

  13. Depth-resolved tomographic analysis of high-Ge-content SiGe/compositionally graded SiGe/Si stacked structure using nanobeam X-ray diffraction

    志田和己, 藤平哲也, 林侑介, 隅谷和嗣, 今井康彦, 木村滋, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 67th　2020

  14. Implementation of Pavlovian conditioning in 4-terminal planar TiO2-x memristive devices

    三宅亮太郎, 林侑介, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 67th　2020

  15. Nano-scale structure analysis of bulk GaN crystals grown by OVPE method

    栗谷淳, 藤平哲也, 濱地威明, 林侑介, 滝野淳一, 隅智亮, 今西正幸, 森勇介, 隅谷和嗣, 今井康彦, 木村滋, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  16. Polarity Determination Using Electron Diffraction for -c/+c AlN Films Fabricated by Sputtering and High-Temperature Annealing

    林侑介, 野本健斗, 濱地威明, 藤平哲也, 三宅秀人, 五十嵐信行, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  17. Operand observation of local piezoelectric lattice deformation in AlGaN/GaN HEMT devices by synchrotron radiation nanobeam X-ray diffraction

    嶋田章宏, 塩見春奈, 藤平哲也, 林侑介, 金木奨太, 橋詰保, 今井康彦, 隅谷和嗣, 木村滋, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  18. Implementation of STP/LTP based on 2D control of oxygen vacancy distribution in 4-terminal planar TiO2-x memristive device

    安達健太, 三宅亮太郎, 林侑介, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  19. Analysis for three-dimensional propagation behaviors of a and a + c types threading dislocations in HVPE-grown GaN bulk crystals

    濱地威明, 藤平哲也, 林侑介, 今西正幸, 森勇介, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  20. Microstructure analysis of thick AlN films grown with sputter-deposited annealed AlN templates on nano-patterned sapphire substrates

    山本望, 濱地威明, 林侑介, 藤平哲也, 三宅秀人, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  21. Correlation between three-dimensional morphology and Burgers vector of threading dislocations in GaN bulk crystals grown by HVPE methods

    濱地威明, 藤平哲也, 林侑介, 今西正幸, 森勇介, 五十嵐信行, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  22. Resistive switching and synaptic properties of amorphous GaOx memristive devices

    上甲守治, 池内太志, 林侑介, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 81st　2020

  23. Atomic-Resolution Imaging of Shark Teeth and Strengthening Function of Fluorine

    Tetsuya Tohei, Yoshiro Takano, Yuichi Ikuhara

    CERAMICS JAPAN　Vol. 54　No. 9　p. 642-645　2019/09　Article, review, commentary, editorial, etc. (scientific journal)

  24. 低消費電力人工シナプス素子開発を目指した酸化物メモリスタ材料の原子・電子構造解析

    藤平哲也, 酒井朗, 竹内正太郎, 井阪健, 五十嵐信行

    名古屋大学電子光学研究のあゆみ　No. 30　2019

  25. ドナー密度分布制御型メモリスタ素子における抵抗変化機構の有限要素法シミュレーション

    永田善也, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  26. 放射光ナノビームX線回折による窒化物半導体HEMTデバイスにおける圧電応答局所格子変形の直接観測

    植田瑛, 藤平哲也, 安藤祐次, 橋詰保, 今井康彦, 隅谷和嗣, 木村滋, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  27. TiO2-xエピタキシャル薄膜を用いた4端子メモリスタ素子の抵抗変化特性

    三宅亮太郎, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  28. 放射光ナノビームX線回折を用いた半導体材料・デバイスの構造解析

    酒井朗, 志田和己, 植田瑛, 藤平哲也, 今井康彦, 隅谷和嗣, 木村滋

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  29. 放射光ナノビームX線回折による窒化物半導体HEMTデバイスにおける圧電応答局所格子変形ダイナミクスの観測

    植田瑛, 藤平哲也, 安藤祐次, 橋詰保, 今井康彦, 隅谷和嗣, 木村滋, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  30. NaフラックスGaNバルク単結晶の単独転位における漏れ電流特性とバーガースベクトルの解析

    濱地威明, 藤平哲也, 今西正幸, 森勇介, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  31. OVPE法によるホモエピタキシャルGaN厚膜の欠陥構造評価

    真鍋海希, 藤平哲也, 滝野淳一, 滝野淳一, 隅智亮, 今西正幸, 森勇介, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 66th　2019

  32. GaOxを用いたクロスバーアレイメモリスタの開発と抵抗変化特性

    上甲守治, 林侑介, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 80th　2019

  33. ドナー密度分布制御型メモリスタ素子における抵抗変化機構の有限要素法シミュレーション

    永田善也, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 80th　2019

  34. 組成傾斜層を有するSi基板上高Ge組成SiGe膜の深さ分解ナノビームX線回折評価

    志田和己, 藤平哲也, 林侑介, 隅谷和嗣, 今井康彦, 木村滋, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 80th　2019

  35. 4端子TiO2-x薄膜メモリスタ素子によるシナプス特性の実装

    三宅亮太郎, 林侑介, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 80th　2019

  36. ハイドライド気相成長GaNバルク単結晶の単独貫通転位における漏れ電流評価

    濱地威明, 藤元聖人, 藤平哲也, 林侑介, 今西正幸, 森勇介, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 80th　2019

  37. 窒化物半導体中の格子欠陥が生み出す特異構造の3次元解析

    酒井朗, 志田和己, 竹内正太郎, 藤平哲也, 今井康彦, 木村滋

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 65th　2018

  38. ナノビームX線回折法を用いた組成傾斜層を有する高Ge組成SiGe膜の結晶深さ方向格子面微細構造トモグラフィック解析

    志田和己, 竹内正太郎, 藤平哲也, 今井康彦, 木村滋, SCHULZE Andreas, CAYMAX Matty, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 65th　2018

  39. 酸素空孔分布制御型4端子メモリスタ素子における抵抗変化機構の有限要素法シミュレーション

    永田善也, 清水拓磨, 竹内正太郎, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 65th　2018

  40. 酸素空孔分布制御型4端子メモリスタ素子の抵抗変化特性精密制御

    清水拓磨, 永田善也, 竹内正太郎, 藤平哲也, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 65th　2018

  41. 改良型NaフラックスGaN単結晶内の単独転位における漏れ電流特性評価

    濱地威明, 竹内正太郎, 藤平哲也, 今西正幸, 今出完, 森勇介, 酒井朗

    応用物理学会春季学術講演会講演予稿集(CD-ROM)　Vol. 65th　2018

  42. 改良型NaフラックスGaN単結晶内単独転位の漏れ電流特性解析

    濱地威明, 藤平哲也, 今西正幸, 森勇介, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 79th　2018

  43. ナノビームX線回折法による改良型NaフラックスGaNバルク単結晶の深さ方向結晶構造解析

    志田和己, 山本望, 藤平哲也, 今西正幸, 森勇介, 隅谷和嗣, 今井康彦, 木村滋, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 79th　2018

  44. Development of Four Terminal Memristive Devices for Expressing Hetero Synaptic Functions in Neuromorphic Computing

    酒井朗, 竹内正太郎, 藤平哲也

    村田学術振興財団年報　No. 32　2018

  45. 酸化物セラミックス粒界原子拡散の第一原理理論解析

    藤平哲也

    生産と技術　Vol. 70　No. 1　p. 109-112　2018/01　Article, review, commentary, editorial, etc. (scientific journal)

  46. 原子分解能分析電子顕微鏡法を用いた金属／窒化物ヘテロ界面の原子レベル構造解析

    熊本明仁, 柴田直哉, 藤平哲也, 幾原雄一

    日本結晶学会誌　Vol. 59　p. 246-251　2017/05

  47. 4端子TiO2単結晶メモリスタの抵抗変化特性

    清水拓磨, 竹内正太郎, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 78th　2017

  48. ルチル型TiO2単結晶微細メモリスタ素子における抵抗変化領域のTEM微構造解析

    山口賢吾, 村上弘弥, 清水拓磨, 竹内正太郎, 藤平哲也, 酒井朗

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 78th　2017

  49. B11-O-01Atomic-Scale STEM Characterization of Grain Boundaries in Oxides

    Yuichi Ikuhara, Ryo Ishikawa, Tsubasa Nakagawa, Eita Tochigi, Tetsuya Tohei, Naoya Shibata

    Microscopy　Vol. 64　No. suppl 1　2015/11

    Publisher: Oxford University Press ({OUP})

  50. (Ca,RE)‐Fe‐As系新規層状化合物の合成と超伝導特性

    焼田裕之, 荻野拓, 岡田朋之, SINGH Shiv Jee, SALA Alberto, 山本明保, 岸尾光二, 藤平哲也, 幾原雄一, 藤久裕司, 後藤義人, 永崎洋, 下山淳一

    応用物理学会秋季学術講演会講演予稿集(CD-ROM)　Vol. 74th　2013/08/31

  51. 電子顕微鏡が目指す微小の世界

    藤平哲也, 柴田直哉, 幾原雄一

    検査技術　Vol. 18　No. 3　p. 14-20　2013/03　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: 日本工業出版

  52. 単一サイズ酸化タングステンクラスターディスクのHAADF‐STEM観察

    安松久登, 早川鉄一郎, 藤平哲也, 幾原雄一

    日本化学会講演予稿集　Vol. 92nd　No. 2　2012/03/09

  53. Finite temperature properties of ceramics by first principles phonon state calculations

    Vol. 25　No. 2　p. 18-22　2012/02　Article, review, commentary, editorial, etc. (scientific journal)

    Publisher: ティー・アイ・シィー

  54. 六方晶希土類複合酸化物の強誘電性と微構造

    藤平哲也, 幾原雄一, 田中功, 森分博紀

    日本金属学会講演概要(CD-ROM)　Vol. 151st　2012

  55. Ca‐Mg‐Ti‐Fe‐As‐O系における新超伝導相(Fe2As2)(Ca8(Mg,Ti)6Oy)及び様々な積層パターン

    清水保章, 荻野拓, 山本明保, 岸尾光二, 藤平哲也, 幾原雄一, 下山淳一

    応用物理学関係連合講演会講演予稿集(CD-ROM)　Vol. 58th　2011/03/09

  56. 厚いペロブスカイト層を持つ鉄系超伝導体の超伝導特性

    佐藤伸也, 荻野拓, 山本明保, 岸尾光二, 藤平哲也, 幾原雄一, 下山淳一

    応用物理学関係連合講演会講演予稿集(CD-ROM)　Vol. 58th　2011/03/09

  57. 新規層状Feニクタイド超伝導体(Fe2As2)(Ca6(Al,Ti)4Oy)

    町田健次, 荻野拓, 川口直登, 牛山晃一, 山本明保, 岸尾光二, 藤平哲也, 幾原雄一, 下山淳一

    応用物理学会学術講演会講演予稿集(CD-ROM)　Vol. 71st　2010/08/30

  58. 厚いブロック層を持つ鉄ニクタイド系超伝導体の新ホモロガス相Fe2As2Can+1(Sc,Ti)nOy[n=3,4,5]

    佐藤伸也, 荻野拓, 山本明保, 岸尾光二, 藤平哲也, 幾原雄一, 下山淳一

    応用物理学会学術講演会講演予稿集(CD-ROM)　Vol. 71st　2010/08/30

Publications 1

  1. Engineering crystal habit : applications of polymorphism and microstexture learning from nature

    Ishikawa, Fumitaro, Ohfuji, Hiroaki, Kawano, Jun, Tohei, Tetsuya

    Springer,Array　2024/02

    ISBN: 9789819602650

Presentations 12

  1. 酸化物四端子型メモリスタの結晶微細構造と電気特性

    藤平哲也, 三宅亮太郎, 谷口奈穂, 上甲守治, 林侑介, 酒井朗

    第68回応用物理学会春季学術講演会　2021/03/06

  2. Electric and Microstructural Analysis of Rutile TiO2 Single Crystal Memristor

    Tetsuya Tohei

    FMS-NANOMATA 2019　2019/11/10

  3. FIBおよびイオンミリング試料作製法による酸化チタン単結晶メモリスタの微構造解析

    藤平哲也

    大阪大学ナノテクノロジー設備供用拠点 微細構造解析プラットフォーム2018年度第1回地域セミナー　2018/10/02

  4. 先端材料設計を目指した材料・デバイスの原子レベル解析

    藤平哲也

    日本セラミックス協会2017年度ガラス表面・ 分析研究討論会　2018/02/16

  5. Atomic diffusion and vibrational properties of alumina ceramics by first principles calculations

    〇T. Tohei, Y. Watanabe, N. Shibata, Y. Ikuhara

    41th International Conference and Exposition on Advanced Ceramics and Composites (ICACC17)　2017/01/26

  6. Atomic scale STEM analysis of structure and dopant effects on grain boundary in oxide ceramics

    〇T. Tohei, M. Sakai, N. Shibata, Y. Ikuhara

    40th International Conference and Exposition on Advanced Ceramics and Composites (ICACC16)　2016/01/26

  7. Phonon and related properties of ceramics materials from first principles calculations

    〇T. Tohei, Y. Watanabe, Y. Ikuhara

    2nd International Symposium on Frontiers in Materials Science (FMS2015)　2015/11/21

  8. First principles study of grain boundary diffusion in α-Al2O3

    〇T. Tohei, Y. Watanabe, N. Shibata, Y. Ikuhara

    11th International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE)　2015/06/16

  9. 走査透過型電子顕微鏡による材料微構造の原子レベル解析

    藤平哲也, 熊本明仁, 柴田直哉, 幾原雄一

    日本顕微鏡学会第70回記念学術講演会　2014/05/12

  10. 原子分解能STEMによる材料界面・微構造の解析

    藤平哲也, 柴田直哉, 溝口照康, 幾原雄一

    第74回応用物理学会秋季学術講演会　2013/09/16

  11. Structure and Dopant Effects of Oxide Grain Boundaries by Atomic Scale STEM Analysis

    〇T. Tohei, M. Sakai, Y. Watanabe, N. Shibata, Y. Ikuhara

    7th International Conference on the Science and Technology for Advanced Ceramics (STAC7)　2013/06/20

  12. Multiscale analysis of structure and property of functional crystals based on combined microscopic approaches

    Tetsuya Tohei

    2020/02/15

Works 2

  1. 3D-OVPE-GaN単結晶におけるフローラル成長モード（日本セラミックス協会第47回学術写真賞 特別賞, セラミックス協会誌 2023年表紙）

    栗谷淳, 藤平哲也, 林侑介, 宇佐美茂佳, 今西正幸, 森勇介, 酒井朗, 滝野淳一, 隅智亮, 岡山芳央

    日本セラミックス協会第47回学術写真賞 特別賞 2022/09 -

  2. Versatile functionality of four-terminal TiO2-x memristive devices as artificial synapses for neuromorphic computing (Slected for Cover of ACS Appl. Electron. Mater.)

    Ryotaro Miyake, Zenya Nagata, Kenta Adachi, Yusuke Hayashi, Tetsuya Tohei, Akira Sakai

    2022/05 -

Industrial Property Rights 1

  1. メモリスタ、それを備えた半導体素子およびメモリスタを備えたアレイシステム

    林侑介, 藤平哲也, 酒井朗

    出願日:2020/11

Media Coverage 1

  1. 離陸開始のGaNで早くも次世代研究活況、高耐圧・高周波に複数軸で挑む

    日経BP

    2023/02

Institutional Repository 2

Content Published in the University of Osaka Institutional Repository (OUKA)

  1. 酸化物系人工シナプス素子におけるドナー欠陥挙動の第一原理理論解析

    藤平 哲也

    High Performance Computer Journal　Vol. 14　p. 66-69　2024/07

  2. Versatile Functionality of Four-Terminal TiO₂₋ₓ Memristive Devices as Artificial Synapses for Neuromorphic Computing

    Miyake Ryotaro, Nagata Zenya, Adachi Kenta, Hayashi Yusuke, Tohei Tetsuya, Sakai Akira

    ACS Applied Electronic Materials　Vol. 4　No. 5　p. 2326-2336　2022/05/24