Papers - HAYASHI Koichi

Local atomic structure of V-doped BiFeO₃ thin films measured by X-ray fluorescence holography Reviewed

Kazuki Arima, Seiji Nakashima, Koji Kimura, Koichi Hayashi, Naohisa Happo and Hironori Fujisawa

Japanese Journal of Applied Physics   62   SM1017   2023.08

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.35848/1347-4065/ace728

Local Structures of Fe_0.08Co_0.92 Studied by X-ray Fluorescence Holography Reviewed

Yuto Fukui, Tomoya Kanno, Kota Yamakawa, Hajime Nakada, Yodai Kobayashi, Keiko Widyanisa, Yuka Tomimatsu, Koji Kimura, Toetsu Shishido, Naohisa Happo, Kenji Ohoyama, Koichi Hayashi

e-Journal of Surface Science and Nanotechnology   21   305 - 309   2023.07

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Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1380/ejssnt.2023-054

Atomic structure of ZrO₂-doped Li₂O–SiO₂-based multi-component glasses revealed by molecular dynamics–reverse Monte Carlo modeling Reviewed International coauthorship

R. Toyoda, K. Usui, T. Hirota, K. Kimura, Y. Onodera, M.R. Cicconi, R. Belli, M. Brehl, J. Lubauer, U. Lohbauer, H. Tajiri, K. Ikeda, T. Hayakawa, D. de Ligny, S. Kohara, K. Hayashi

Journal of Non-Crystalline Solids   616   122472   2023.07

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Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2023.122472

Single Crystal Growth with Flux Method and Local Structure Analysis around Fe Using X-ray Fluorescence Holography for Multiferroic Pb(Fe_1/2Ta_1/2)O₃ Reviewed

Yuto Inoue, Koji Kimura, Masato Maruyama, Naohisa Happo, Toru Asaka, Makoto Iwata, Tomohiro Matsushita, Koichi Hayashi

e-Journal of Surface Science and Nanotechnology   2023-048   2023.05

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Authorship：Last author   Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1380/ejssnt.2023-048

Pressure dependence of superconductivity in alkaline earth metal-doped FeSe: toward completion of the phase diagram of superconducting transition temperature versus FeSe layer distance Reviewed International coauthorship

Mitsuki Ikeda, Huan Li, Zhiyan Zhang, Yuki Yamamoto, Hidenori Goto, Ritsuko Eguchi, Hirofumi Ishii, Yen-Fa Liao, Yasuhiro Takabayashi, Koichi Hayashi, and Yoshihiro Kubozono

Chemistry of Materials   35 ( 11 )   4338 - 4346   2023.05

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/acs.chemmater.3c00391

Direct Observation of Group‑V Dopant Substitutional Defects in CdTe Single Crystals Reviewed International coauthorship

Akira Nagaoka, Koji Kimura, Artoni Kelvin R. Ang, Yasuhiro Takabayashi, Kenji Yoshino, Qingde Sun, Baoying Dou, Su-Huai Wei, Koichi Hayashi, and Kensuke Nishioka

Journal of the American Chemical Society   145 ( 16 )   9191 - 9197   2023.04

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/jacs.3c01248

Local Structural Analysis around Solute-Element in Annealed Mg_99.2Zn_0.2Y_0.6 Alloy Using X-ray Fluorescence Holography Reviewed

Koji Kimura, Daisuke Egusa, Koji Hagihara, Naohisa Happo, Naomi Kawamura, Hiroo Tajiri, Kouichi Hayashi, Eiji Abe

Materials Transactions   64 ( 4 )   750 - 755   2023.04

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.2320/matertrans.MT-MD2022009

Effects of Oxygen on Lattice Defects in Single-Crystalline Mg₂Si Thermoelectrics Reviewed

Kei Hayashi, Sota Kawamura, Yusuke Hashimoto, Noboru Akao, Zhicheng Huang, Wataru Saito,Kaichi Tasaki, Koichi Hayashi, Tomohiro Matsushita and Yuzuru Miyazaki

Nanomaterials   13 ( 7 )   1222   2023.03

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/nano13071222

Influence of temperature-induced A-site cation redistribution on the functional properties of A-site complex polar perovskite K_½Bi_½TiO₃ Reviewed International coauthorship

Gina E. Eyoum, Udo Eckstein, Hana Ursic, Monica Pinto-Salazar, Gerd Buntkowsky, Pedro B. Groszewicz, Stefano Checchia, Kouichi Hayashi, Kyle G. Webbera and Neamul H. Khansur

Journal of Materials Chemistry A   11   8285 - 8298   2023.03

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1039/D3TA00808H

Multiple-site Ag doping in Bi₂Se₃: Compositional crossover from substitution to intercalation as revealed by photoelectron diffraction and X-ray fluorescence holography Reviewed

Fumihiko Matsui , Hiroshi Ota , Ritsuko Eguchi , Hidenori Goto , Kaya Kobayashi , Jun Akimitsu , Hikaru Ozaki , Takumi Nishioka , Koji Kimura , Kouichi Hayashi , Takuya Shimano , Naohisa Happo , Yoshihiro Kubozono

Journal of Electron Spectroscopy and Related Phenomena   264   147295   2023.03

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1016/j.elspec.2023.147295

Development of serial X-ray fluorescence holography for radiation-sensitive protein crystals Reviewed

A. K. R. Ang, Y. Umena, A. Sato-Tomita, N. Shibayama, N. Happo, R. Marumi, Y. Yamamoto, K. Kimura, N. Kawamura, Y. Takano, T. Matsushita, Y. C. Sasaki, J.-R. Shen and K. Hayashi

Journal of Synchrotron Radiation   30 ( 2 )   368 - 378   2023.01

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DOI： 10.1107/S1600577522011833

Semiconductor–metal transition in Bi₂Se₃ caused by impurity doping Reviewed

Takaki Uchiyama, Hidenori Goto, Eri Uesugi, Akihisa Takai, Lei Zhi, Akari Miura, Shino Hamao, Ritsuko Eguchi, Hiromi Ota, Kunihisa Sugimoto, Akihiko Fujiwara, Fumihiko Matsui, Koji Kimura, Kouichi Hayashi, Teppei Ueno, Kaya Kobayashi, Jun Akimitsu & Yoshihiro Kubozono

Scientific Reports   13   537   2023.01

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1038/s41598-023-27701-5

Local structure analysis around Y in Mg_99.7Y_0.3 single crystal using x-ray fluorescence holography Reviewed International coauthorship

Tatsuya Kato,Koji Kimura,Shinya Hosokawa,Shinji Ando,Seishi Kashima,Yusuke Hashimoto ,Naohisa Happo,Tomohiro Matsushita,Hiro fumiIshii,Kouichi Hayashi

Journal of Electron Spectroscopy and Related Phenomena   262   147279   2022.12

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DOI： 10.1016/j.elspec.2022.147279

Controlling dielectric properties of Nb + X (X = Al, Ga, In) co-doped and Nb-doped rutile-type TiO₂ single crystals Reviewed

Shota Kakimoto,Yujiro Hashimoto,Taro Kuwano,Koji Kimura,Kouichi Hayashi,Manabu Hagiwara,Kazuhiko Deguchi and Hiroki Taniguchi

Journal of Materials Chemistry C   11   1304 - 1310   2022.12

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1039/d2tc03914a

Elucidation of the Local Structure of the Topological Insulator β-PdBi2 by X-ray Fluorescence Holography Reviewed International coauthorship

Ai Suzuki, Yanting Zhang, Mitsuki Ikeda, Yuki Yamamoto, Ritsuko Eguchi, Hidenori Goto, Kaisei Yamamoto, Naohisa Happo, Koji Kimura, Kouichi Hayashi, Hirofumi Ishii, and Yoshihiro Kubozono

The Journal of Physical Chemistry C   126 ( 50 )   21405 - 21413   2022.12

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/acs.jpcc.2c06505

KTaO₃ Wafers Doped with Sr or La Cations for Modeling Water-Splitting Photocatalysts: 3D Atom Imaging around Doping Cations Reviewed

Akira Sasahara, Koji Kimura, Hanggara Sudrajat, Naohisa Happo, Kouichi Hayashi, and Hiroshi Onishi

The Journal of Physical Chemistry C   126 ( 46 )   19745 - 19755   2022.11

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/acs.jpcc.2c06080

X-ray fluorescence holography of biological metal sites: Application to myoglobin Reviewed

A. Sato-Tomita, A. K. R. Ang, K. Kimura, R. Marumi, N. Happo, T. Matsushita, S.-Y. Park, N. Shibayama, Y. C. Sasaki, K. Hayashi

Biochemical and Biophysical Research Communications   635 ( 20 )   277 - 282   2022.10

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.bbrc.2022.10.003

Other Link： https://doi.org/10.1016/j.bbrc.2022.10.003

Atomic Positions and Displacements in Piezoelectric Materials Ca3TaGa3Si2O14 and Ca3TaGa1.5Al1.5Si2O14 investigated by Ta-Lα X-ray Fluorescence Holography Reviewed

M. Kitaura, A.K.R. Ang, Y. Yamamoto, N. Happo, K. Kimura, K. Hayashi, S. Watanabe, Y. Yokota, Y. Ohashi, K. Kamada, A. Yoshikawa, H. Yamane, and A. Ohnishi

Frontiers in Materials   9   2022.09

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3389/fmats.2022.977371

Other Link： https://doi.org/10.3389/fmats.2022.977371

Anomalous atomic fluctuations in the local structure around Mn of (Zn,Sn,Mn)As2 thin films Reviewed

H. Kizaki, K. Hayashi, Cong Lu, N. Happo, S. Hosokawa, S. Hidaka, S. Hayashi, M. Suzuki, and N. Uchitomi

Physical Review B   106   064434   2022.08

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DOI： 10.1103/PhysRevB.106.064434

Epitaxial growth of a homogeneous anatase TiO2 thin film on LaAlO3 (001) using a solvothermal method with anticorrosive ligands Reviewed International coauthorship

K. Ono, K. Kimura, T. Kato, K. Hayashi, R. M. G. Rajapakse, M. Shimomura

Chemical Engineering Journal   451   2022.08

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.cej.2022.138893

Other Link： https://doi.org/10.1016/j.cej.2022.138893