Akira Sakai

6.9k total citations · 1 hit paper
310 papers, 5.6k citations indexed

About

Akira Sakai is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Materials Chemistry. According to data from OpenAlex, Akira Sakai has authored 310 papers receiving a total of 5.6k indexed citations (citations by other indexed papers that have themselves been cited), including 187 papers in Electrical and Electronic Engineering, 115 papers in Atomic and Molecular Physics, and Optics and 86 papers in Materials Chemistry. Recurrent topics in Akira Sakai's work include Semiconductor materials and devices (98 papers), Semiconductor materials and interfaces (49 papers) and Advancements in Semiconductor Devices and Circuit Design (48 papers). Akira Sakai is often cited by papers focused on Semiconductor materials and devices (98 papers), Semiconductor materials and interfaces (49 papers) and Advancements in Semiconductor Devices and Circuit Design (48 papers). Akira Sakai collaborates with scholars based in Japan, United States and Belgium. Akira Sakai's co-authors include Akira Usui, Haruo Sunakawa, Shigeaki Zaima, Atsushi Yamaguchi, Toru Tatsumi, Osamu Nakatsuka, Shotaro Takeuchi, Yukio Yasuda, Masaki Ogawa and Shu Kurokawa and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and The Journal of Chemical Physics.

In The Last Decade

Akira Sakai

286 papers receiving 5.4k citations

Hit Papers

align trajectories sort by overperformance

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.

Thick GaN Epitaxial Growth with Low Dislocation Density by Hydride Vapor Phase Epitaxy

1997 773 citations Akira Sakai 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
Akira Sakai Japan	35	3.0k	2.2k	2.1k	1.6k	999	310	5.6k
A. R. Goñi Spain	35	3.0k 1.0×	2.7k 1.2×	1.9k 0.9×	732 0.4×	933 0.9×	188	5.4k
Angus Rockett United States	45	5.6k 1.9×	4.9k 2.3×	2.0k 0.9×	1.2k 0.8×	925 0.9×	279	7.8k
Euijoon Yoon South Korea	34	2.4k 0.8×	3.3k 1.5×	1.3k 0.6×	1.3k 0.8×	908 0.9×	298	5.2k
Tien‐Chang Lu Taiwan	44	4.4k 1.5×	4.3k 2.0×	3.4k 1.6×	4.1k 2.5×	2.0k 2.0×	546	9.4k
G.-C. Wang United States	42	2.3k 0.8×	2.8k 1.3×	1.8k 0.9×	970 0.6×	830 0.8×	187	5.5k
Ningsheng Xu China	44	3.3k 1.1×	5.4k 2.5×	1.4k 0.7×	463 0.3×	3.0k 3.0×	258	8.6k
Elif Ertekin United States	31	1.8k 0.6×	3.3k 1.5×	989 0.5×	691 0.4×	664 0.7×	142	5.0k
Silvija Gradečak United States	42	3.7k 1.2×	4.7k 2.2×	1.4k 0.7×	1.8k 1.1×	3.1k 3.1×	123	7.5k
Sean W. King United States	33	2.6k 0.9×	1.7k 0.8×	712 0.3×	693 0.4×	511 0.5×	194	4.0k
Philippe Godignon Spain	28	5.2k 1.8×	1.4k 0.7×	1.6k 0.7×	840 0.5×	1.8k 1.8×	344	7.1k

Countries citing papers authored by Akira Sakai

Since Specialization

Citations

This map shows the geographic impact of Akira Sakai'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 Akira Sakai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Akira Sakai more than expected).

Fields of papers citing papers by Akira Sakai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Akira Sakai. 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 Akira Sakai. The network helps show where Akira Sakai may publish in the future.

Co-authorship network of co-authors of Akira Sakai

This figure shows the co-authorship network connecting the top 25 collaborators of Akira Sakai. A scholar is included among the top collaborators of Akira Sakai 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 Akira Sakai. Akira Sakai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Hayashi, Yusuke, Tetsuya Tohei, Kazushi Sumitani, et al.. (2025). Machine learning assisted nanobeam X-ray diffraction based analysis on hydride vapor-phase epitaxy GaN. Journal of Applied Crystallography. 58(4). 1205–1219.

Sakai, Akira, et al.. (2024). 49‐1: Invited Paper: Novel Brightness Enhancement Technology for Reflective LCDs. SID Symposium Digest of Technical Papers. 55(1). 658–661.

Tohei, Tetsuya, Yusuke Hayashi, Shigeyoshi Usami, et al.. (2024). Analysis of local strain fields around individual threading dislocations in GaN substrates by nanobeam x-ray diffraction. Journal of Applied Physics. 135(22). 2 indexed citations

Satō, Toshikazu, Tetsuya Tohei, Yusuke Hayashi, et al.. (2023). Conduction mechanism of Schottky contacts fabricated on etch pits originating from single threading dislocation in a highly Si-doped HVPE GaN substrate. Materials Science in Semiconductor Processing. 167. 107778–107778. 4 indexed citations

Hayashi, Yusuke, Tetsuya Tohei, Yoshikata Nakajima, et al.. (2023). Micro- and Nanostructure Analysis of Vapor-Phase-Grown AlN on Face-to-Face Annealed Sputtered AlN/Nanopatterned Sapphire Substrate Templates. Journal of Electronic Materials. 52(8). 5099–5108. 1 indexed citations

Zhang, Zexuan, Yusuke Hayashi, Tetsuya Tohei, et al.. (2022). Molecular beam homoepitaxy of N-polar AlN: Enabling role of aluminum-assisted surface cleaning. Science Advances. 8(36). eabo6408–eabo6408. 22 indexed citations

Hayashi, Yusuke, Kenjiro Uesugi, Kanako Shojiki, et al.. (2021). Thermal strain analysis considering in-plane anisotropy for sputtered AlN on c- and a-plane sapphire under high-temperature annealing. AIP Advances. 11(9). 4 indexed citations

Ueda, Akira, Atsushi Okazaki, Shotaro Takeuchi, et al.. (2020). Local piezoelectric properties in Na-flux GaN bulk single crystals. Journal of Applied Physics. 128(12). 1 indexed citations

Tohei, Tetsuya, et al.. (2019). Correlation between current leakage and structural properties of threading dislocations in GaN bulk single crystals grown using a Na-flux method. Japanese Journal of Applied Physics. 58(SC). SCCB23–SCCB23. 15 indexed citations

10.

Tohei, Tetsuya, et al.. (2019). Local current leakage at threading dislocations in GaN bulk single crystals grown by a modified Na-flux method. Japanese Journal of Applied Physics. 58(5). 50918–50918. 3 indexed citations

11.

Tohei, Tetsuya, Masayuki Imanishi, Yusuke Mori, et al.. (2019). Quantitative analysis of lattice plane microstructure in the growth direction of a modified Na-flux GaN crystal using nanobeam X-ray diffraction. Japanese Journal of Applied Physics. 58(SC). SCCB16–SCCB16. 4 indexed citations

12.

Takeuchi, Shotaro, et al.. (2019). Demonstrative operation of four-terminal memristive devices fabricated on reduced TiO2 single crystals. Scientific Reports. 9(1). 2601–2601. 7 indexed citations

13.

Takeuchi, Shotaro, et al.. (2018). Analysis of Ti valence states in resistive switching regions of a rutile TiO. Japanese Journal of Applied Physics. 57(6). 1 indexed citations

14.

Takeuchi, Shotaro, Tetsuya Tohei, Hideto Miyake, et al.. (2018). Microstructural analysis in the depth direction of a heteroepitaxial AlN thick film grown on a trench-patterned template by nanobeam X-ray diffraction. Journal of Applied Physics. 123(16). 5 indexed citations

15.

Takeuchi, Shotaro, Masayuki Imanishi, Mamoru Imade, et al.. (2017). Control of dislocation morphology and lattice distortion in Na-flux GaN crystals. Journal of Applied Physics. 122(10). 7 indexed citations

16.

Miura, Norihiko, et al.. (2005). Geotechnical Properties of Soft Cohesive Lowland Soils Deposited in Saga Airport Highway, Japan. MEDIA KOMUNIKASI TEKNIK SIPIL. 13(3). 19–35. 1 indexed citations

17.

Sano, Masafumi, et al.. (2003). High efficiency large area solar cells using microcrystalline silicon. 3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of. 3. 2793–2798. 6 indexed citations

18.

Kurokawa, Shu & Akira Sakai. (1997). Tip-Sample Capacitance in STM(STM-BEEM interfaces). Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy. 44(2). 173–179. 2 indexed citations

19.

Sakai, Akira, et al.. (1995). An Ethnographic Research on Teachers' Work and Culture of Teaching--Its Perspective, Framework, and Some Empirical Findings. 35. 29–665. 1 indexed citations

20.

Sakai, Akira. (1985). Maximum modulus sets for Am(D). Kobe journal of mathematics. 2. 85–87. 2 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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