Yongzhao Yao

collaborators

7 papers

cond-mat.mtrl-sci2026

Groove-shaped defects in as-grown (001)-oriented $β$ -Ga $_{2}$ O $_{3}$ epilayers prepared by halide vapor phase epitaxy

Yongzhao Yao, Daiki Katsube, Hirotaka Yamaguchi +1

Groove-shaped defects (GSDs) degrade the surface flatness of as-grown (001)-oriented $β$ -Ga $_{2}$ O $_{3}$ epilayers and necessitate chemical mechanical polishing before device fabricati…

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

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…

cond-mat.mtrl-sci2026

Dislocations in (011)-oriented vertical Bridgman $β$ -Ga $_{2}$ O $_{3}$ substrates

Yongzhao Yao, Daiki Katsube, Hirotaka Yamaguchi +1

Dislocation in (011)-oriented $β$ -Ga $_{2}$ O $_{3}$ substrates grown by the vertical Bridgman method was investigated using X-ray topography (XRT), combined with X-ray reticulography. Tr…

cond-mat.mtrl-sci2026

Determination of Burgers vectors of dislocations in monoclinic $β$ -Ga $_{2}$ O $_{3}$ crystals by large-angle convergent-beam electron diffraction

Yoshihiro Sugawara, Yongzhao Yao, Yukari Ishikawa

We demonstrate the applicability of large-angle convergent-beam electron diffraction (LACBED) for Burgers vector determination in monoclinic $β$ -Ga $_{2}$ O $_{3}$ . The inner product $g \…

cond-mat.mtrl-sci2026

Synchrotron-radiation X-ray topography and reticulography of bulk $β$ -Ga $_{2}$ O $_{3}$ crystals grown by the cold crucible method

Yongzhao Yao, Koki Mizuno, Kazuki Ohnishi +9

The structural properties of a $β$ -Ga $_{2}$ O $_{3}$ single crystal grown by the oxide crystal growth from cold crucible (OCCC) method were investigated using synchrotron radiation X-ray…

Groove-shaped defects in as-grown (001)-oriented β-Ga2​O3​ epilayers prepared by halide vapor phase epitaxy

Three-dimensional visualization of threading dislocation in GaN by polarized-light microscopy

Comprehensive determination of Burgers vectors of threading dislocations in GaN substrates by combining reflection and transmission synchrotron-radiation x-ray topography

Dislocations in (011)-oriented vertical Bridgman β-Ga2​O3​ substrates

Determination of Burgers vectors of dislocations in monoclinic β-Ga2​O3​ crystals by large-angle convergent-beam electron diffraction

Synchrotron-radiation X-ray topography and reticulography of bulk β-Ga2​O3​ crystals grown by the cold crucible method

Groove-shaped defects in as-grown (001)-oriented $β$ -Ga $_{2}$ O $_{3}$ epilayers prepared by halide vapor phase epitaxy

Dislocations in (011)-oriented vertical Bridgman $β$ -Ga $_{2}$ O $_{3}$ substrates

Determination of Burgers vectors of dislocations in monoclinic $β$ -Ga $_{2}$ O $_{3}$ crystals by large-angle convergent-beam electron diffraction

Synchrotron-radiation X-ray topography and reticulography of bulk $β$ -Ga $_{2}$ O $_{3}$ crystals grown by the cold crucible method