Akira Hirako

421 total citations
17 papers, 352 citations indexed

About

Akira Hirako is a scholar working on Condensed Matter Physics, Electronic, Optical and Magnetic Materials and Materials Chemistry. According to data from OpenAlex, Akira Hirako has authored 17 papers receiving a total of 352 indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Condensed Matter Physics, 10 papers in Electronic, Optical and Magnetic Materials and 9 papers in Materials Chemistry. Recurrent topics in Akira Hirako's work include GaN-based semiconductor devices and materials (13 papers), Ga2O3 and related materials (10 papers) and ZnO doping and properties (9 papers). Akira Hirako is often cited by papers focused on GaN-based semiconductor devices and materials (13 papers), Ga2O3 and related materials (10 papers) and ZnO doping and properties (9 papers). Akira Hirako collaborates with scholars based in Japan and Saudi Arabia. Akira Hirako's co-authors include Kazuhiro Ohkawa, Kazuhide Kusakabe, Katsushi Fujii, Takashi Ito, Tomomasa Watanabe, Momoko Deura, Takafumi Yao, Kenichi Nakamura, Satoru Tanaka and Takayoshi Kobayashi and has published in prestigious journals such as The Journal of Chemical Physics, Journal of The Electrochemical Society and Japanese Journal of Applied Physics.

In The Last Decade

Akira Hirako

17 papers receiving 345 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Akira Hirako Japan	11	271	193	170	114	80	17	352
Carlos Anthony Sanchez United States	10	193 0.7×	161 0.8×	95 0.6×	192 1.7×	69 0.9×	28	340
S. M. Seutter United States	11	248 0.9×	122 0.6×	232 1.4×	247 2.2×	118 1.5×	19	482
James C. Gallagher United States	15	319 1.2×	325 1.7×	274 1.6×	278 2.4×	72 0.9×	49	562
Kenji Shimoyama Japan	9	190 0.7×	80 0.4×	165 1.0×	234 2.1×	121 1.5×	14	381
Shuichi Kubo Japan	5	387 1.4×	236 1.2×	208 1.2×	156 1.4×	101 1.3×	9	422
Taketoshi Tanaka Japan	8	357 1.3×	165 0.9×	154 0.9×	126 1.1×	225 2.8×	17	427
Shaoyan Yang China	11	243 0.9×	144 0.7×	186 1.1×	109 1.0×	55 0.7×	46	336
R. Zhang China	12	143 0.5×	102 0.5×	148 0.9×	108 0.9×	101 1.3×	26	309
Lashounda Franklin United States	11	82 0.3×	93 0.5×	206 1.2×	124 1.1×	100 1.3×	23	334

Countries citing papers authored by Akira Hirako

Since Specialization

Citations

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

Fields of papers citing papers by Akira Hirako

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Akira Hirako

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

All Works

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17 of 17 papers shown

Ohkawa, Kazuhiro, Kenichi Nakamura, Akira Hirako, & Daisuke Iida. (2019). Influence of polymerization among Al- and Ga-containing molecules on growth rate and Al content in AlGaN. Journal of Crystal Growth. 516. 17–20. 5 indexed citations

Ohkawa, Kazuhiro, et al.. (2012). 740-nm emission from InGaN-based LEDs on c-plane sapphire substrates by MOVPE. Journal of Crystal Growth. 343(1). 13–16. 70 indexed citations

Nakamura, Kenichi, Akira Hirako, & Kazuhiro Ohkawa. (2010). Analysis of pulsed injection of precursors in AlN‐MOVPE growth by computational fluid simulation. Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics. 7(7-8). 2268–2271. 15 indexed citations

Hirako, Akira, et al.. (2010). Electrooptic effect of water in electric double layer at interface of GaN electrode. Optical Review. 17(3). 352–356. 11 indexed citations

Fujii, Katsushi, et al.. (2007). n-型Al x Ga 1-x NおよびIn y Ga 1-y N合金のバンド端エネルギーおよび光電気化学的性質. Journal of The Electrochemical Society. 154(2). 175–179. 1 indexed citations

Fujii, Katsushi, et al.. (2007). Photoelectrochemical reaction and H2 generation at zero bias optimized by carrier concentration of n-type GaN. The Journal of Chemical Physics. 126(5). 54708–54708. 70 indexed citations

Fujii, Katsushi, et al.. (2007). Band-Edge Energies and Photoelectrochemical Properties of n-Type Al[sub x]Ga[sub 1−x]N and In[sub y]Ga[sub 1−y]N Alloys. Journal of The Electrochemical Society. 154(2). B175–B175. 32 indexed citations

Hirako, Akira & Kazuhiro Ohkawa. (2006). Formation of polymers in TMGa/NH3/H2 system under GaN growth. Journal of Crystal Growth. 289(2). 428–432. 7 indexed citations

Hirako, Akira, et al.. (2006). Analysis of TMGa/NH₃/H₂ reaction system in GaN‐MOVPE growth by computational simulation. physica status solidi (a). 203(7). 1716–1719. 1 indexed citations

10.

Ohkawa, Kazuhiro, et al.. (2006). . Shinku. 49(9). 520–524. 2 indexed citations

11.

Hirako, Akira, Kazuhide Kusakabe, & Kazuhiro Ohkawa. (2005). Modeling of Reaction Pathways of GaN Growth by Metalorganic Vapor-Phase Epitaxy Using TMGa/NH₃/H₂ System: A Computational Fluid Dynamics Simulation Study. Japanese Journal of Applied Physics. 44(2R). 874–874. 55 indexed citations

12.

Hirako, Akira & Kazuhiro Ohkawa. (2004). Effect of thermal radiation and absorption in GaN-MOVPE growth modeling on temperature distribution and chemical state. Journal of Crystal Growth. 276(1-2). 57–63. 20 indexed citations

13.

Kusakabe, Kazuhide, Akira Hirako, Satoru Tanaka, & Kazuhiro Ohkawa. (2004). Computational fluid dynamics on gaseous and surface chemistry of GaN‐MOVPE system for various pressures. Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics. 1(10). 2569–2572. 11 indexed citations

14.

Hirako, Akira, et al.. (2002). GaN-MOVPE growth and its microscopic chemistry of gaseous phase by computational thermodynamic analysis. Journal of Crystal Growth. 237-239. 931–935. 22 indexed citations

15.

Hirako, Akira & Kazuhiro Ohkawa. (2002). Decomposition and Uniformity of Material Gases in GaN MOVPE. physica status solidi (a). 194(2). 489–493. 13 indexed citations

16.

Ohkawa, Kazuhiro, et al.. (2001). Growth of GaN Layers by One-, Two-, and Three-Flow Metalorganic Vapor Phase Epitaxy. physica status solidi (a). 188(2). 621–624. 1 indexed citations

17.

Ohkawa, Kazuhiro, et al.. (2001). Growth of GaN Layers by One-, Two-, and Three-Flow Metalorganic Vapor Phase Epitaxy. physica status solidi (a). 188(2). 621–624. 16 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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