-
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年9月9日 研究論文(学術雑誌)
出版者・発行元:American Association for the Advancement of Science (AAAS)
-
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年5月 研究論文(学術雑誌)
-
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年10月 研究論文(学術雑誌)
-
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年9月1日 研究論文(学術雑誌)
出版者・発行元:IOP Publishing
-
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年6月14日 研究論文(学術雑誌)
出版者・発行元:AIP Publishing
-
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年7月1日 研究論文(学術雑誌)
出版者・発行元:IOP Publishing
-
Gate Tuning of Synaptic Functions Based on Oxygen Vacancy Distribution Control in Four- Terminal TiO2−x Memristive Devices
Zenya Nagata, Takuma Shimizu, Tsuyoshi Isaka, Tetsuya Tohei, Nobuyuki Ikarashi, Akira Sakai
Scientific Reports Vol. 9 No. 1 2019年7月 研究論文(学術雑誌)
-
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年5月 研究論文(学術雑誌)
-
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年2月 研究論文(学術雑誌)
-
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年6月1日 研究論文(国際会議プロシーディングス)
出版者・発行元:Japan Society of Applied Physics
-
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年4月28日 研究論文(学術雑誌)
出版者・発行元:AIP Publishing
-
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年10月 研究論文(学術雑誌)
-
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年12月 研究論文(学術雑誌)
-
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年9月 研究論文(学術雑誌)
-
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年12月 研究論文(学術雑誌)
-
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年6月 研究論文(学術雑誌)
-
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年2月 研究論文(学術雑誌)
-
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年1月 研究論文(学術雑誌)
-
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年10月 研究論文(学術雑誌)
-
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年10月 研究論文(学術雑誌)
-
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年11月 研究論文(学術雑誌)
-
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年4月 研究論文(学術雑誌)
-
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年2月 研究論文(学術雑誌)
-
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年2月 研究論文(学術雑誌)
-
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年1月 研究論文(学術雑誌)
-
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年8月 研究論文(学術雑誌)
-
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年9月1日 研究論文(学術雑誌)
-
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年8月21日 研究論文(学術雑誌)
-
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年4月18日 研究論文(学術雑誌)
出版者・発行元:Springer Science and Business Media LLC
-
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年2月 研究論文(学術雑誌)
出版者・発行元:Royal Society of Chemistry (RSC)
-
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年6月11日 研究論文(学術雑誌)
出版者・発行元:AIP Publishing
-
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年2月29日 研究論文(学術雑誌)
-
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年11月15日 研究論文(学術雑誌)
-
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年3月29日 研究論文(学術雑誌)
出版者・発行元:Springer Science and Business Media LLC
-
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年2月10日 研究論文(学術雑誌)
出版者・発行元:Springer Science and Business Media LLC
-
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年1月30日 研究論文(学術雑誌)
出版者・発行元:Springer Science and Business Media LLC
-
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年1月24日 研究論文(学術雑誌)
出版者・発行元:IOP Publishing
-
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年1月1日 研究論文(学術雑誌)
出版者・発行元:IOP Publishing
-
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年9月1日 研究論文(学術雑誌)
出版者・発行元:AIP Publishing
-
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年9月28日 研究論文(学術雑誌)
出版者・発行元:AIP Publishing
-
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年4月 研究論文(学術雑誌)
-
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年4月 研究論文(学術雑誌)
-
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年12月1日 研究論文(学術雑誌)
出版者・発行元:IOP Publishing
-
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年11月 研究論文(国際会議プロシーディングス)
-
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年7月 研究論文(学術雑誌)
-
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年6月 研究論文(学術雑誌)
-
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年5月 研究論文(国際会議プロシーディングス)
-
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年4月28日 研究論文(学術雑誌)
出版者・発行元:AIP Publishing
-
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年4月
-
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年1月
-
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年1月
-
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年9月 研究論文(国際会議プロシーディングス)
-
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年9月 研究論文(学術雑誌)
-
Ferroelectric domains and phase evolution in (Fe:) KTa1−xNbxO3 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年8月15日 研究論文(学術雑誌)
-
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年5月 研究論文(学術雑誌)
-
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年4月 研究論文(学術雑誌)
-
A Novel Class of Multiferroic Material, Ba4Ti3O12·nBiFeO3 with Localized Magnetic Ordering Evaluated from Their Single Crystals
H. Zhao, K. Cai, Z. Cheng, T. Jia, H. Kimura, Z. Ma, Q. Fu, Z. Huang, T. Matsumoto, T. Tohei, N. Shibata, Y. Ikuhara
ADVANCED ELECTRONIC MATERIALS Vol. 3 No. 1 2017年1月 研究論文(学術雑誌)
-
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年3月 研究論文(学術雑誌)
-
溶融接合された金属/窒化物界面の原子分解能STEM-EDSマッピング
熊本 明仁, 柴田 直哉, 名雪 桂一郎, 藤平 哲也, 幾原 雄一, 寺崎 伸幸, 長友 義幸, 長瀬 敏之, 秋山 和裕, 黒光 祥郎
まてりあ Vol. 55 No. 12 p. 611-611 2016年
出版者・発行元:公益社団法人 日本金属学会
-
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年1月 研究論文(学術雑誌)
-
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年12月 研究論文(学術雑誌)
-
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年7月 研究論文(学術雑誌)
-
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年11月 研究論文(学術雑誌)
-
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年6月 研究論文(学術雑誌)
-
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年 研究論文(学術雑誌)
-
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年1月 研究論文(学術雑誌)
-
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年10月 研究論文(学術雑誌)
-
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年7月 研究論文(学術雑誌)
-
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年 研究論文(学術雑誌)
-
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年9月 研究論文(学術雑誌)
-
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年8月 研究論文(学術雑誌)
-
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年6月 研究論文(学術雑誌)
-
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年6月 研究論文(学術雑誌)
-
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年11月 研究論文(学術雑誌)
-
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年11月 研究論文(学術雑誌)
-
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年10月 研究論文(学術雑誌)
-
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年10月 研究論文(学術雑誌)
-
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年8月 研究論文(学術雑誌)
-
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年5月 研究論文(学術雑誌)
-
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年4月 研究論文(学術雑誌)
-
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年9月 研究論文(学術雑誌)
-
Large magnetocaloric effect of Mn3-xCoxGaC
T. Tohei, H. Wada, T. Kanomata
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS Vol. 272 p. E585-E586 2004年5月 研究論文(学術雑誌)
-
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年 研究論文(国際会議プロシーディングス)