Koji Akai

737 total citations
49 papers, 612 citations indexed

About

Koji Akai is a scholar working on Materials Chemistry, Atomic and Molecular Physics, and Optics and Condensed Matter Physics. According to data from OpenAlex, Koji Akai has authored 49 papers receiving a total of 612 indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Materials Chemistry, 18 papers in Atomic and Molecular Physics, and Optics and 12 papers in Condensed Matter Physics. Recurrent topics in Koji Akai's work include Advanced Thermoelectric Materials and Devices (38 papers), Thermal Expansion and Ionic Conductivity (19 papers) and Thermal properties of materials (18 papers). Koji Akai is often cited by papers focused on Advanced Thermoelectric Materials and Devices (38 papers), Thermal Expansion and Ionic Conductivity (19 papers) and Thermal properties of materials (18 papers). Koji Akai collaborates with scholars based in Japan, United States and China. Koji Akai's co-authors include Mitsuru Matsuura, Kengo Kishimoto, T. Koyanagi, Kenji Koga, Hironori Asada, Koichiro Suekuni, R. Sakamoto, T. Takabatake, M. Inoue and Naoya Ikeda and has published in prestigious journals such as Physical Review Letters, Physical review. B, Condensed matter and Applied Physics Letters.

In The Last Decade

Koji Akai

45 papers receiving 595 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Koji Akai Japan 15 508 186 172 161 104 49 612
Junsen Xiang China 13 348 0.7× 169 0.9× 249 1.4× 76 0.5× 221 2.1× 37 611
Tyson Lanigan-Atkins United States 9 407 0.8× 71 0.4× 78 0.5× 226 1.4× 43 0.4× 10 469
Andrew Supka United States 13 504 1.0× 102 0.5× 114 0.7× 292 1.8× 68 0.7× 19 579
Hantao Zhang United States 8 218 0.4× 165 0.9× 128 0.7× 128 0.8× 82 0.8× 14 396
Mickaël Beaudhuin France 11 330 0.6× 120 0.6× 156 0.9× 161 1.0× 23 0.2× 40 433
St. Berger Austria 16 345 0.7× 178 1.0× 460 2.7× 87 0.5× 569 5.5× 33 830
В. Г. Кытин Russia 13 379 0.7× 165 0.9× 55 0.3× 146 0.9× 40 0.4× 53 455
М. П. Волков Russia 10 188 0.4× 98 0.5× 174 1.0× 118 0.7× 82 0.8× 66 356
Uthpala Herath United States 4 288 0.6× 122 0.7× 112 0.7× 103 0.6× 96 0.9× 7 381
M. A. Prosnikov Russia 11 261 0.5× 122 0.7× 157 0.9× 160 1.0× 118 1.1× 31 427

Countries citing papers authored by Koji Akai

Since Specialization
Citations

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

Fields of papers citing papers by Koji Akai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koji Akai

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

All Works

20 of 20 papers shown
1.
Kishimoto, Kengo, et al.. (2024). Preparation, electronic structures, and thermoelectric properties of X8Zn4Ge42 (X = Na, K, Cs) clathrates. Journal of Solid State Chemistry. 338. 124899–124899. 1 indexed citations
2.
Kishimoto, Kengo & Koji Akai. (2023). Thermoelectric properties of type-I clathrate Na8Al8Ge38. Journal of Solid State Chemistry. 324. 124122–124122. 4 indexed citations
3.
Kishimoto, Kengo & Koji Akai. (2020). Carrier mobilities, thermoelectric properties, and band structures of type-I clathrates Ba 8 M 16 Ge 30 (M = Al, Ga, In). Japanese Journal of Applied Physics. 59(8). 81001–81001. 1 indexed citations
4.
Kishimoto, Kengo, et al.. (2020). Synthesis and some properties of Ba24−(Ga,Sn)136 (x~4) type-II clathrates. Journal of Solid State Chemistry. 290. 121540–121540.
5.
Kishimoto, Kengo & Koji Akai. (2019). Thermoelectric and transport properties of sintered type-II clathrate Cs 8 Ba 16 Ga 40 Sn 96. Japanese Journal of Applied Physics. 58(10). 101002–101002. 3 indexed citations
6.
Kishimoto, Kengo, et al.. (2016). Preparation and thermoelectric properties of sintered type-II clathrates (K,Ba)24(Al,Sn)136. Journal of Alloys and Compounds. 693. 1039–1044. 8 indexed citations
7.
Akai, Koji, et al.. (2014). First-Principles Study of Electronic Structure and Thermoelectric Properties of Ge-Doped Tin Clathrates. Journal of Electronic Materials. 43(6). 2081–2085.
8.
9.
Akai, Koji, et al.. (2012). Electronic Structures and Thermoelectric Properties of Sb-Doped Type-VIII Clathrate Ba<sub>8</sub>Ga<sub>16</sub>Sn<sub>30</sub>. MATERIALS TRANSACTIONS. 53(4). 636–640. 3 indexed citations
10.
Xu, Jingtao, et al.. (2011). Valence Band Studies of p- and n-Type Ba8Ga16Ge30 Using High-Resolution Photoelectron Spectroscopy. Journal of Electronic Materials. 40(5). 769–772. 3 indexed citations
11.
Tang, Jun, Jingtao Xu, Satoshi Heguri, et al.. (2010). Electron-Phonon Interactions ofSi100andGe100Superconductors with Ba Atoms Inside. Physical Review Letters. 105(17). 176402–176402. 11 indexed citations
12.
Akai, Koji, Kengo Kishimoto, H. Kurisu, et al.. (2009). First-Principles Study of Semiconducting Clathrate Ba8Al16Ge30. Journal of Electronic Materials. 38(7). 1412–1417. 8 indexed citations
13.
Kishimoto, Kengo, et al.. (2009). Preparation and thermoelectric properties of sintered type-I clathrates K8GaxSn46−x. Dalton Transactions. 39(4). 1113–1117. 11 indexed citations
14.
Kishimoto, Kengo, Naoya Ikeda, Koji Akai, & T. Koyanagi. (2008). Synthesis and Thermoelectric Properties of Silicon Clathrates Sr8AlxGa16-xSi30with the Type-I and Type-VIII Structures. Applied Physics Express. 1. 31201–31201. 35 indexed citations
15.
Tang, Jun, Zhaofei Li, Jing Ju, et al.. (2008). Soft x-ray photoelectron spectroscopy study of type-I clathrates. Science and Technology of Advanced Materials. 9(4). 44207–44207. 5 indexed citations
16.
Akai, Koji, Kenji Koga, & Mitsuru Matsuura. (2007). Electronic Structure and Thermoelectric Properties of Noble Metal Clathrates: Ba<SUB>8</SUB>M<SUB>6</SUB>Ge<SUB>40</SUB>(M = Cu, Ag, Au). MATERIALS TRANSACTIONS. 48(4). 684–688. 16 indexed citations
17.
Koga, Kenji, Hiroaki Anno, Koji Akai, Mitsuru Matsuura, & Kakuei Matsubara. (2007). First-Principles Study of Electronic Structure and Thermoelectric Properties for Guest Substituted Clathrate Compounds Ba<SUB>6</SUB>R<SUB>2</SUB>Au<SUB>6</SUB>Ge<SUB>40</SUB> (R=Eu or Yb). MATERIALS TRANSACTIONS. 48(8). 2108–2113. 7 indexed citations
18.
Akai, Koji, H. Kurisu, Takahiro Moriyama, Shunya Yamamoto, & M. Matsuura. (2002). Effects of defects and impurities on electronic properties in skutterudites. c43. 105–108. 1 indexed citations
19.
Akai, Koji, et al.. (2002). Electronic structure and thermoelectric properties of Skutterudites. b45. 93–96. 2 indexed citations
20.
Akai, Koji, et al.. (1998). Polaron in a spherical quantum dot embedded in a nonpolar matrix. Physical review. B, Condensed matter. 58(12). 7986–7993. 62 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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