Toru Akiyama

3.6k total citations
242 papers, 2.9k citations indexed

About

Toru Akiyama is a scholar working on Condensed Matter Physics, Electrical and Electronic Engineering and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Toru Akiyama has authored 242 papers receiving a total of 2.9k indexed citations (citations by other indexed papers that have themselves been cited), including 113 papers in Condensed Matter Physics, 107 papers in Electrical and Electronic Engineering and 101 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Toru Akiyama's work include GaN-based semiconductor devices and materials (88 papers), Semiconductor materials and devices (69 papers) and ZnO doping and properties (49 papers). Toru Akiyama is often cited by papers focused on GaN-based semiconductor devices and materials (88 papers), Semiconductor materials and devices (69 papers) and ZnO doping and properties (49 papers). Toru Akiyama collaborates with scholars based in Japan, United States and Indonesia. Toru Akiyama's co-authors include Tomonori Ito, Kohji Nakamura, A. J. Freeman, Riki Shimabukuro, Kosuke Sano, Hiroyuki Kageshima, M. Weinert, Yuji Fujiwara, Kenji Shiraishi and Tomoki Yamashita and has published in prestigious journals such as Physical Review Letters, Nano Letters and Applied Physics Letters.

In The Last Decade

Toru Akiyama

235 papers receiving 2.9k citations

Peers

Countries citing papers authored by Toru Akiyama

Since Specialization

Citations

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

Fields of papers citing papers by Toru Akiyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Toru Akiyama

This figure shows the co-authorship network connecting the top 25 collaborators of Toru Akiyama. A scholar is included among the top collaborators of Toru Akiyama 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 Toru Akiyama. Toru Akiyama 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

#	Work	Indexed citations
1	First-principles study of excess Si transport in Si oxide on Si substrate using two-layer-oxide model for thermally oxidized interface 2026 ·Japanese Journal of Applied Physics ·Hiroyuki Kageshima, (unknown), Toru Akiyama, (unknown)	0
2	Atomic Scale Insights into Si Transport Pathway in Si-oxide Film Based on Theoretical Investigation of Medium Density Effects 2025 ·e-Journal of Surface Science and Nanotechnology ·Hiroyuki Kageshima, Toru Akiyama, Kenji Shiraishi	1
3	Chemical vapor deposition of compound semiconductors: process simulation and experimental validation 2025 ·Applied Physics Express ·Yoshihiro Kangawa, Akira Kusaba, Toru Akiyama, Shugo Nitta, Motoaki Iwaya, Hideto Miyake, Paweł Kempisty, (unknown), (unknown), Magdalena A. Załuska–Kotur	0
4	Analysis of inversion-domain boundaries in four-layer polarity-inverted AlN structure 2025 ·Applied Physics Letters ·(unknown), Kanako Shojiki, Toru Akiyama, (unknown), Takao Nakamura, (unknown), E Sato, Masahiro Uemukai, Tomoyuki Tanikawa, (unknown), Hideto Miyake	0
5	Effects of Sc Composition and Lattice Constraint on Polarization Switching of Sc _x Al _{1− x} N Alloys: A First‐Principles Study 2025 ·physica status solidi (b) ·Toru Akiyama, Tomomi Miyamoto, Takahiro Kawamura	0
6	An Ab Initio Study for Oxygen Adsorption Behavior on Polar GaN Surfaces 2024 ·physica status solidi (b) ·Toru Akiyama, Takahiro Kawamura	4
7	Crystal orientation control of a-plane AlN films on r-plane sapphire fabricated by sputtering and high-temperature annealing 2024 ·Journal of Applied Physics ·(unknown), (unknown), (unknown), Kenjiro Uesugi, Kanako Shojiki, Toru Akiyama, Takao Nakamura, Hideto Miyake	3
8	Bandgap Change in Short‐Period InN/AlN Superlattices Induced by Lattice Strain 2023 ·physica status solidi (b) ·Takahiro Kawamura, (unknown), (unknown), Toru Akiyama, Yoshihiro Kangawa	1
9	First-principles calculations of α-Ga2O3 /Al2O3 superlattice band structures 2023 ·Journal of Crystal Growth ·Takahiro Kawamura, Toru Akiyama, Yoshihiro Kangawa	7
10	Role of charged oxygen vacancies and substrate lattice constraint on structural stability of Ga₂O₃ polymorphs 2023 ·Applied Physics Express ·Toru Akiyama, Takahiro Kawamura, Tomonori Ito	3
11	Influence of oxygen-related defects on the electronic structure of GaN 2022 ·Japanese Journal of Applied Physics ·(unknown), Takahiro Kawamura, Toru Akiyama, Shigeyoshi Usami, Masayuki Imanishi, Masashi Yoshimura, Yusuke Mori, (unknown), (unknown)	3
12	Structures and stability of GaN/Ga ₂ O ₃ interfaces: a first-principles study 2022 ·Japanese Journal of Applied Physics ·(unknown), Toru Akiyama, Takahiro Kawamura, Tomonori Ito	0
13	Ab initio study for orientation dependence of nitrogen incorporation at 4H-SiC/SiO ₂ interfaces 2022 ·Japanese Journal of Applied Physics ·Toru Akiyama, (unknown), Tomonori Ito, Hiroyuki Kageshima, (unknown), Kenji Shiraishi	2
14	An ab initio-based approach for the formation of pyramidal inversion domain boundaries in highly Mg-doped GaN 2022 ·Japanese Journal of Applied Physics ·(unknown), Toru Akiyama, Tomonori Ito	1
15	Bandgap engineering of α-Ga ₂ O ₃ by hydrostatic, uniaxial, and equibiaxial strain 2021 ·Japanese Journal of Applied Physics ·Takahiro Kawamura, Toru Akiyama	23
16	Effects of surface and twinning energies on twining-superlattice formation in group III–V semiconductor nanowires: a first-principles study 2019 ·Nanotechnology ·Toru Akiyama, Kohji Nakamura, Tomonori Ito	7
17	Theoretical investigations on the growth mode of GaN thin films on an AlN(0001) substrate 2019 ·Japanese Journal of Applied Physics ·(unknown), Toru Akiyama, Abdul‐Muizz Pradipto, Kohji Nakamura, Tomonori Ito	4
18	Polarity inversion of aluminum nitride by direct wafer bonding 2018 ·Applied Physics Express ·Yusuke Hayashi, Ryuji Katayama, Toru Akiyama, Tomonori Ito, Hideto Miyake	15
19	Theoretical Investigations for Strain Relaxation and Growth Mode of InAs Thin Layers on GaAs(110) 2017 ·physica status solidi (b) ·Tomonori Ito, Toru Akiyama, Kohji Nakamura	2
20	Ab initio-based approach to structural modulation on 4H-SiC(112¯0) during MBE growth 2009 ·Physica E Low-dimensional Systems and Nanostructures ·Tomonori Ito, Takumi Ito, Toru Akiyama, Kohji Nakamura	2

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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