3 papers
cond-mat.mtrl-sci2026
Three-dimensional visualization of threading dislocation in GaN by polarized-light microscopy
Yukari Ishikawa, Kisara Matsumoto, Kazuki Ohnishi +1
We demonstrate high-throughput three-dimensional imaging of threading dislocations in ammonothermal GaN wafers using polarized-light microscopy with collimated LED illumination. Th…
cond-mat.mtrl-sci2026
Synchrotron-radiation X-ray topography and reticulography of bulk -GaO crystals grown by the cold crucible method
Yongzhao Yao, Koki Mizuno, Kazuki Ohnishi +9
The structural properties of a -GaO single crystal grown by the oxide crystal growth from cold crucible (OCCC) method were investigated using synchrotron radiation X-ra…
cond-mat.mtrl-sci2026
Comprehensive determination of Burgers vectors of threading dislocations in GaN substrates by combining reflection and transmission synchrotron-radiation x-ray topography
Kazuki Ohnishi, Kenji Iso, Hirotaka Ikeda +2
Burgers vectors (b) of threading dislocations (TDs) in an acidic ammonothermal-grown GaN substrate were investigated using synchrotron radiation x-ray topography (SR-XRT) by combin…