publication_type publication_year number author title journal_title volume_number issue_number start_page end_page doi reported_at Paper 2026 1 Zhendong Wu, Tetsuya Tohei, Yusuke Hayashi, Shigeyoshi Usami, Masayuki Imanishi, Yusuke Mori, Junichi Takino, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura, Akira Sakai, Zhendong Wu, Tetsuya Tohei, Shigeyoshi Usami, Masayuki Imanishi, Yusuke Mori, Junichi Takino, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura, Akira Sakai Uncovering crystal structure evolution via nanobeam X-ray diffraction with a continuity-driven machine learning approach Materials & Design 263 115669 115669-12 https://doi.org/10.1016/j.matdes.2026.115669 2026-07-22 20:19:36 +0900 Paper 2025 1 Zhendong Wu, Yusuke Hayashi, Tetsuya Tohei, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura, Akira Sakai, Zhendong Wu, Tetsuya Tohei, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura, Akira Sakai Machine learning assisted nanobeam X-ray diffraction based analysis on hydride vapor-phase epitaxy GaN Journal of Applied Crystallography 58 4 S1600576725004169-1 S1600576725004169-15 https://doi.org/10.1107/s1600576725004169 2026-07-22 20:19:36 +0900 Paper 2025 2 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, Akihiro Shimada, Haruna Shiomi, Tetsuya Tohei, Masaya Yamaguchi, Junpei Yamamoto, Takeaki Hamachi, Yasuhiko Imai, Kazushi Sumitani, Shigeru Kimura, Shota Kaneki, Tamotsu Hashizume, Akira Sakai In situ nanobeam x-ray diffraction of local strain in AlGaN/GaN high-electron-mobility transistors under operating condition Journal of Applied Physics 138 7 075701-1 075701-8 https://doi.org/10.1063/5.0275921 2026-07-22 20:19:36 +0900 Paper 2025 3 Akihiro Ohtake, Yusuke Hayashi Controlled polarity inversion in GaAs/Ge/GaAs{111} heterostructures Applied Physics Letters 126 20 201601-1 201601-6 https://doi.org/10.1063/5.0271426 2026-07-22 20:19:36 +0900 Paper 2025 4 Tomoyuki Horikawa, Yoshiyuki Tsusaka, Junji Matsui, Tetsuya Tohei, Yusuke Hayashi, Akira Sakai, Tomoyuki Horikawa, Yoshiyuki Tsusaka, Junji Matsui, Tetsuya Tohei, Akira Sakai Analyses of oxygen precipitates in CZ-Si by X-ray diffuse scattering using parallel X-ray beam Japanese Journal of Applied Physics 64 4 045502 045502-7 https://doi.org/10.35848/1347-4065/adc0d3 2026-07-22 20:19:36 +0900 Paper 2024 1 T. Hamachi, T. Tohei, Y. Hayashi, S. Usami, M. Imanishi, Y. Mori, K. Sumitani, Y. Imai, S. Kimura, A. Sakai Analysis of local strain fields around individual threading dislocations in GaN substrates by nanobeam x-ray diffraction Journal of Applied Physics 135 22 225702-1 225702-10 https://doi.org/10.1063/5.0199961 2026-07-22 20:19:36 +0900