Kimiyoshi Koshi

2.2k total citations · 1 hit paper
18 papers, 1.4k citations indexed

About

Kimiyoshi Koshi is a scholar working on Electronic, Optical and Magnetic Materials, Materials Chemistry and Renewable Energy, Sustainability and the Environment. According to data from OpenAlex, Kimiyoshi Koshi has authored 18 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Electronic, Optical and Magnetic Materials, 14 papers in Materials Chemistry and 9 papers in Renewable Energy, Sustainability and the Environment. Recurrent topics in Kimiyoshi Koshi's work include Ga2O3 and related materials (16 papers), ZnO doping and properties (14 papers) and Advanced Photocatalysis Techniques (9 papers). Kimiyoshi Koshi is often cited by papers focused on Ga2O3 and related materials (16 papers), ZnO doping and properties (14 papers) and Advanced Photocatalysis Techniques (9 papers). Kimiyoshi Koshi collaborates with scholars based in Japan. Kimiyoshi Koshi's co-authors include Akito Kuramata, Shigenobu Yamakoshi, Shinya Watanabe, Yu Yamaoka, Takekazu Masui, Osamu Ueda, Tomoya Moribayashi, Makoto Kasu, Kohei Sasaki and Kenji Hanada and has published in prestigious journals such as Applied Physics Letters, Japanese Journal of Applied Physics and physica status solidi (b).

In The Last Decade

Kimiyoshi Koshi

18 papers receiving 1.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

High-quality β-Ga₂O₃ single crystals grown by edge-defined film-fed growth

2016 839 citations Akito Kuramata, Kimiyoshi Koshi et al. Japanese Journal of Applied Physics profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Kimiyoshi Koshi Japan	11	1.4k	1.4k	765	194	72	18	1.4k
Yu Yamaoka Japan	7	890 0.6×	861 0.6×	480 0.6×	155 0.8×	50 0.7×	12	926
Daivasigamani Krishnamurthy Japan	8	874 0.6×	865 0.6×	384 0.5×	222 1.1×	127 1.8×	24	954
А. И. Печников Russia	17	765 0.5×	722 0.5×	457 0.6×	232 1.2×	134 1.9×	81	878
Chandan Joishi United States	15	1.3k 1.0×	1.3k 0.9×	586 0.8×	309 1.6×	195 2.7×	45	1.4k
Takeki Itoh United States	14	592 0.4×	558 0.4×	333 0.4×	124 0.6×	95 1.3×	24	632
А. I. Kochkova Russia	17	897 0.6×	852 0.6×	594 0.8×	165 0.9×	53 0.7×	50	934
Thaddeus J. Asel United States	13	545 0.4×	672 0.5×	249 0.3×	216 1.1×	76 1.1×	31	747
Ymir Kalmann Frodason Norway	15	535 0.4×	620 0.5×	266 0.3×	278 1.4×	28 0.4×	35	736
Kazuhiko Sunakawa Japan	5	598 0.4×	613 0.4×	307 0.4×	150 0.8×	104 1.4×	8	696
M. P. Scheglov Russia	14	456 0.3×	451 0.3×	232 0.3×	231 1.2×	83 1.2×	60	608

Countries citing papers authored by Kimiyoshi Koshi

Since Specialization

Citations

This map shows the geographic impact of Kimiyoshi Koshi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kimiyoshi Koshi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kimiyoshi Koshi more than expected).

Fields of papers citing papers by Kimiyoshi Koshi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kimiyoshi Koshi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kimiyoshi Koshi. The network helps show where Kimiyoshi Koshi may publish in the future.

Co-authorship network of co-authors of Kimiyoshi Koshi

This figure shows the co-authorship network connecting the top 25 collaborators of Kimiyoshi Koshi. A scholar is included among the top collaborators of Kimiyoshi Koshi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Kimiyoshi Koshi. Kimiyoshi Koshi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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18 of 18 papers shown

Igarashi, Takuya, Yuki Ueda, Kimiyoshi Koshi, et al.. (2025). Growth of 6 Inch Diameter β‐Ga₂O₃ Crystal by the Vertical Bridgman Method. physica status solidi (b). 262(8). 5 indexed citations

Ueda, Yuki, Takuya Igarashi, Kimiyoshi Koshi, et al.. (2023). Two-inch Fe-doped β-Ga₂O₃ (010) substrates prepared using vertical Bridgman method. Japanese Journal of Applied Physics. 62(SF). SF1006–SF1006. 33 indexed citations

Yamaguchi, Hiroshi, Shinya Watanabe, Yu Yamaoka, Kimiyoshi Koshi, & Akito Kuramata. (2022). Mechanical properties and dislocation dynamics in β -Ga ₂ O ₃. Japanese Journal of Applied Physics. 61(4). 45506–45506. 12 indexed citations

Yamaguchi, Hiroshi, Shinya Watanabe, Yu Yamaoka, Kimiyoshi Koshi, & Akito Kuramata. (2020). Subsurface-damaged layer in (010)-oriented β -Ga ₂ O ₃ substrates. Japanese Journal of Applied Physics. 59(12). 125503–125503. 7 indexed citations

Thieu, Quang Tu, et al.. (2020). Surface states on (001) oriented β -Ga2O3 epilayers, their origin, and their effect on the electrical properties of Schottky barrier diodes. Applied Physics Letters. 116(9). 35 indexed citations

Kuramata, Akito, Kimiyoshi Koshi, Shinya Watanabe, et al.. (2018). Bulk crystal growth of Ga2O3. 13–13. 35 indexed citations

Hashiguchi, Akihiro, Tomoya Moribayashi, Kimiyoshi Koshi, et al.. (2017). 結晶欠陥をもつ(001)β-Ga 2 O 3 基板上に作製したSchottky障壁ダイオードの電気的性質. Japanese Journal of Applied Physics. 56(8). 1–86501. 1 indexed citations

Oshima, Takayoshi, Tomoya Moribayashi, Kimiyoshi Koshi, et al.. (2017). Electrical properties of Schottky barrier diodes fabricated on (001) β-Ga₂O₃substrates with crystal defects. Japanese Journal of Applied Physics. 56(8). 86501–86501. 79 indexed citations

Kasu, Makoto, Takayoshi Oshima, Kenji Hanada, et al.. (2017). Crystal defects observed by the etch-pit method and their effects on Schottky-barrier-diode characteristics on $(\bar{2}01)$ β-Ga₂O₃. Japanese Journal of Applied Physics. 56(9). 91101–91101. 64 indexed citations

10.

Masui, Takekazu, et al.. (2016). Fabrication and Characterization of 2-inch (001) β-Ga 2 O 3 Wafers for Power devices. The Japan Society of Applied Physics. 1 indexed citations

11.

Kasu, Makoto, Kenji Hanada, Tomoya Moribayashi, et al.. (2016). Relationship between crystal defects and leakage current in β-Ga. Japanese Journal of Applied Physics. 55(12). 7 indexed citations

12.

Kuramata, Akito, Kimiyoshi Koshi, Shinya Watanabe, et al.. (2016). High-quality β-Ga. Japanese Journal of Applied Physics. 55(12). 2 indexed citations

13.

Hanada, Kenji, et al.. (2016). 成長させたままのβ-Ga 2 O 3 単結晶におけるナノメータサイズ結晶溝の観測. Japanese Journal of Applied Physics. 55(3). 1–30303. 1 indexed citations

14.

Kuramata, Akito, Kimiyoshi Koshi, Shinya Watanabe, et al.. (2016). High-quality β-Ga₂O₃ single crystals grown by edge-defined film-fed growth. Japanese Journal of Applied Physics. 55(12). 1202A2–1202A2. 839 indexed citations breakdown →

15.

Hanada, Kenji, Tomoya Moribayashi, Kimiyoshi Koshi, et al.. (2016). Origins of etch pits in β-Ga₂O₃(010) single crystals. Japanese Journal of Applied Physics. 55(12). 1202BG–1202BG. 68 indexed citations

16.

Hanada, Kenji, Tomoya Moribayashi, Satoshi Masuya, et al.. (2016). Observation of nanometer-sized crystalline grooves in as-grown β-Ga₂O₃ single crystals. Japanese Journal of Applied Physics. 55(3). 30303–30303. 56 indexed citations

17.

Ueda, Osamu, Kimiyoshi Koshi, Akito Kuramata, et al.. (2016). Structural evaluation of defects in β-Ga₂O₃ single crystals grown by edge-defined film-fed growth process. Japanese Journal of Applied Physics. 55(12). 1202BD–1202BD. 107 indexed citations

18.

Kasu, Makoto, Kenji Hanada, Tomoya Moribayashi, et al.. (2016). Relationship between crystal defects and leakage current in β-Ga₂O₃ Schottky barrier diodes. Japanese Journal of Applied Physics. 55(12). 1202BB–1202BB. 82 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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