研究業績

2026年度

学術論文

1.  K. Kakimoto, T. Tomida, V. V. Kochurikhin, M. Kitahara, K. Kamada, S. Nakano, Y. Yao, K. Akaiwa, and A. Yoshikawa, "Effects of impurity segregation on temperature distributions in β-Ga2O3 crystals grown using the vertical Bridgman method", J. Cryst. Growth 686, 128606 (2026).

2. Y. Ishikawa, R. Hattori, Y. Yao, D. Hattori, and K. Sato, "High-throuput, non-detructive, three-dimensional imaging of GaN threading dislocations with in-plane Burgers vector component via phase-contrast microscopy", Appl. Phys. Express 19, 041003 (2026). [Spotlight2026, Open Access]   [Press release]

3. K. Ohnishi, K. Iso, H. Ikeda, Y. Tsusaka, and Y. Yao. "Comprehensive determination of Burgers vectors of threading dislocations in GaN substrates by combining reflection and transmission synchrotron-radiation x-ray topography", J. Appl. Phys. 139, 195701 (2026).

4. Y. Yao,  K. Mizuno, K. Ohnishi, Y. Ishikawa, M. Kitahara, T. Tomida, R. Murakami, V. Kochurikhin, L. Gushchina, K. Kamada, K. Kakimoto, and A. Yoshikawa, "Synchrotron-radiation X-ray topography and reticulography of bulk β-Ga2O3 crystals grown by the cold crucible method", J. Appl. Phys. 139, 205101 (2026).

5. Y. Sugawara, Y. Yao, and Y. Ishikawa, "Determination of Burgers vectors of dislocations in monoclinic β-Ga2O3 crystals by large-angle convergent-beam electron diffraction",   Jpn. J. Appl. Phys. 65, 110901 (2026).

6. Y. Yao, D. Katsube, H. Yamaguchi, S. Yamaguchi, D. Wakimoto, H. Miyamoto, and Y. Ishikawa, "Three-dimensional visualization of lattice defects in β-Ga2O3 via synchrotron-radiation Borrmann-effect X-ray topo-tomography", Appl. Phys. Lett. 128, 231904 (2026).

プレプリント

1.  K. Ohnishi, K. Iso, H. Ikeda, Y. Tsusaka, and Y. Yao. "Comprehensive determination of Burgers vectors of threading dislocations in GaN substrates by combining reflection and transmission synchrotron-radiation x-ray topography", arXiv:2604.04392 (2026).

2. Y. Yao, D. Katsube, H. Yamaguchi, S. Yamaguchi, D. Wakimoto, H. Miyamoto, and Y. Ishikawa, "Three-dimensional visualization of lattice defects in β-Ga2O3 via synchrotron-radiation Borrmann-effect X-ray topo-tomography", arXiv:2604.17826 (2026).

3. Y. Sugawara, Y. Yao, and Y. Ishikawa, "Determination of Burgers vectors of dislocations in monoclinic β-Ga2O3 crystals by large-angle convergent-beam electron diffraction",  arXiv:2604.25428 (2026).

4. Y. Yao, D. Katsube, H. Yamaguchi, and Y. Ishikawa, "Dislocations in (011)-oriented vertical Bridgman β-Ga2O3 substrates", arXiv:2605.07445 (2026).

国際学会発表

1. Y. Yao, ”Lattice Defects in β-Ga2O3 Crystals and Power Devices”, International Workshop on Gallium Oxide and Related Materials (IWGO-6), Maryland, U.S., Aug. 2-7, 2026. Oral. [Invited]

2. K. Ohnishi, K. Iso, H. Ikeda, H. Tsusaka, and Y. Yao, "Examination of Burgers vectors of dislocations in GaN substrates via reflection and transmission synchrotron X-ray topography", 21st International Conference on Defects Recognition, Imaging and Physics in Semiconductors (DRIP21), Warsaw, Poland, Aug. 30-Sep. 3, 2026. Oral.

3. Y. Yao, "Evaluation of Dislocations in GaN Crystals by Multi-beam Excited Sycrhrotron XRT and TEM", 9th International Symposium on Advanced Science and Technology of Si and Related Materials, Nagano, Japan, Oct. 6-9, 2026. Oral. [Invited]

国内学会発表