Peer-reviewed papers


10, R. Akashi, M. Ochi, S. Bordacs, R. Suzuki, Y. Tokura, Y. Iwasa, and R. Arita,
"Two-Dimensional Valley Electrons and Excitons in Noncentrosymmetric 3R−MoS2"
Phys. Rev. Applied 4, 014002 (2015)

9, R. Akashi, M. Kawamura, S. Tsuneyuki, Y. Nomura, and R. Arita,
"First-principles study of the pressure and crystal-structure dependences of the superconducting transition temperature in compressed sulfur hydrides"
Phys. Rev. B 91, 224513 (2015)

8, M. Kriener, A. Kikkawa, T. Suzuki, R. Akashi, R. Arita, Y. Tokura, and Y. Taguchi
"Modification of electronic structure and thermoelectric properties of hole-doped tungsten dichalcogenides"
Phys. Rev. B 91, 075205 (2015)

7, R. Suzuki, M. Sakano, Y. J. Zhang, R. Akashi, D. Morikawa, A. Harasawa, K. Yaji ,K. Kuroda, K. Miyamoto, T. Okuda, K. Ishizaka, R. Arita, and Y. Iwasa
"Valley-dependent spin polarization in bulk MoS2 with broken inversion symmetry"
Nat. Nanotechnol. 9, 611 (2014)

6, R. Akashi and R. Arita,
"Density Functional Theory for Plasmon-Assisted Superconductivity"
J. Phys. Soc. Jpn. 83, 061016 (2014)

5, R. Akashi and R. Arita,
"Nonempirical Study of Superconductivity in Alkali-Doped Fullerides Based on Density Functional Theory for Superconductors"
Phys. Rev. B 88, 054510 (2013)

4, R. Akashi and R. Arita,
"Development of Density-Functional Theory for a Plasmon-Assisted Superconducting State: Application to Lithium Under High Pressures"
Phys. Rev. Lett. 111, 057006 (2013)

3, R. Akashi and R. Arita,
"Density functional theory for superconductors with particle-hole asymmetric electronic structure"
Phys. Rev. B 88, 014514 (2013)

2, J. T. Ye, Y. J. Zhang, R. Akashi, M. S. Bahramy, R. Arita, and Y. Iwasa,
"Superconducting Dome in a Gate-Tuned Band Insulator"
Science 338, 1193 (2012)

1, R. Akashi, K. Nakamura, R. Arita, and M. Imada
"High-temperature superconductivity in layered nitrides β-LixMNCl (M = Ti, Zr, Hf): Insights from density functional theory for superconductors"
Phys. Rev. B 86, 054513 (2012)

Preprint


Review/Coverage

1, R. Akashi and R. Arita,
(Japanese)"Recent progress in density functional theory for superconductors: From the phonon mechanism to the plasmon mechanism"
Solid State Physics 49, 405 (Agne Gijutsu Center; 2014)

Presentation (international)

18, R. Akashi, M. Ochi, S. Bordacs, R. Suzuki, Y. Tokura, Y. Iwasa, and R. Arita
"Two dimensional valley electrons and excitons in the noncentrosymmetric 3R MoS2"
APS March Meeting 2015
Mar 2-6, 2015; Henry B. Gonzalez Convention Center, Texas, USA.
oral (not peer reviewed) P-049

17, R. Akashi, S. Tsuneyuki, and R. Arita
"Hopping selection rule of electrons in staked multilayers and emergent flat band dispersion"
International Symposium on Computics: Quantum Simulation and Design (ISC-QSD)
Dec. 1-3, 2014; Koshiba Hall, Univ. of Tokyo, Tokyo, Japan.
poster (not peer reviewed) P-050

16, R. Akashi, M. Ochi, S. Bordacs, R. Suzuki, Y. Tokura, Y. Iwasa, and R. Arita
"Two dimensional valley electrons and excitons in 3R MoS2 multilayers"
International Symposium on Computics: Quantum Simulation and Design (ISC-QSD)
Dec. 1-3, 2014; Koshiba Hall, Univ. of Tokyo, Tokyo, Japan.
poster (not peer reviewed) P-049

15, R. Akashi and R. Arita
"Density Functional Theory for Plasmon-Assisted Superconductivity"
International Symposium on Computics: Quantum Simulation and Design (ISC-QSD)
Dec. 1-3, 2014; Koshiba Hall, Univ. of Tokyo, Tokyo, Japan.
poster (not peer reviewed) P-084

14, R. Akashi and R. Arita
"Density Functional Theory for Plasmon-Assisted Superconductivity"
The New Generation in Strongly Correlated Electron Systems 2014 (NESCES2014)
Jun. 16-20, 2014; La Maison du Seminaire, Nice, France.
oral (selected)

13, R. Akashi and R. Arita
"Density Functional Theory for Plasmon-Assisted Superconductivity"
4th International Conference on Superconductivity and Magnetism (ICSM2014)
Apr. 27—May 2, 2014; Kervansaray Lara Convention Center & SPA, Antalya, Turkey.
oral (selected)

12, R. Akashi and R. Arita
"Density Functional Theory for Plasmon-Assisted Superconductivity"
American Physical Society March Meeting 2014
May 3-7, 2014; Colorado Convention Center, Denver, Colorado, USA
oral (not peer reviewed)

11, R. Akashi
"Density Functional Theory for Plasmon-Assisted Superconductivity"
ISSP theory seminar
Nov. 22, 2013; Institute for Solid State Physics, Univ. of Tokyo, Kashiwa, Chiba, Japan.
oral (invited)

10, R. Akashi and R. Arita,
"Impact of Plasmons on Superconducting Transition Temperature in Layered Nitrides: Ab initio Study"
International workshop on Novel Superconductors and Super Materials 2013 (NS2 2013)
Nov. 21-22, 2013; The Grand Hall, Minato-ku, Tokyo, Japan.
poster (not peer-reviewed)

9, R. Akashi and R. Arita,
"Impact of Plasmons on Superconducting Transition Temperature in Layered Nitrides: Ab initio Study"
FIRST-QS2C workshop on "Energent Phenomena of Correlated Materials"
Nov. 13-16, 2013; Shinagawa Intercity Hall, Minato-ku, Tokyo, Japan.
poster (not peer-reviewed)

8, R. Akashi and R. Arita
"Development of Density Functional Theory for Superconductors: Particle-hole Asymmetry and Plasmon-phonon Cooperation"
Emergent Quantum Phases In Condensed Matter (EQPCM)
Jun. 12-14, 2013; Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, Japan.
poster (not peer-reviewed)

7, R. Akashi and R. Arita
"Alkali-doped Fullerides: Study based on Density Functional Theory for Superconductors"
Emergent Quantum Phases In Condensed Matter (EQPCM)
Jun. 12-14, 2013; Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, Japan.
poster (not peer-reviewed)

6, R. Akashi and R. Arita
"Alkali-doped Fullerides: Study based on Density Functional Theory for Superconductors"
17th International Symposium on Intercalation Compounds (ISIC17)
May 12—16, 2013; Sendai International Center, Sendai, Japan.
poster (not peer-reviewed)

5, R. Akashi, K. Nakamura, and R. Arita
"New Gap-equation Kernels in the Density Functional Theory for Superconductors: Development and Applications"
QS2C Theory Forum: International Symposium on "Strongly Correlated Quantum Science"
Jan. 26—29, 2013; Ito International Research Center, Hongo Campus, The Univ. of Tokyo, Japan.
poster (not peer-reviewed)

4, R. Akashi and R. Arita
"Ab initio calculation of superconducting transition temperatures of alkali-doped fullerides by Density-functional theory for superconductors"
International symposium “Nanoscience and Quantum Physics 2012” (nanoPHYS’12):
Dec. 17—19, 2012; The International House of Japan Minato-ku, Tokyo, Japan.
poster (not peer-reviewed)

3, R. Akashi, K. Nakamura, and R. Arita
"Development of New Gap-Equation Kernels in the Density Functional Theory for Superconductors"
GCOE International Symposium on Physical Science Frontier
Dec. 8—9, 2012; Takeda Bldg., the University of Tokyo, Japan.
poster (not peer-reviewed)

2, R. Akashi, K. Nakamura, R. Arita, and M. Imada
"High-temperature superconductivity in layered nitrides β-LixMNCl (M = Ti, Zr, Hf): Insights from density functional theory for superconductors"
Innovations in Strongly Correlated Electronic Systems: School and Workshop
Aug. 6 -- 17, 2012; the Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy
poster (not peer-reviewed)

1, R. Akashi, K. Nakamura, R. Arita, and M. Imada
"Unconventionality of high-Tc Superconductivity in layered nitrides beta-MNCl (M=Ti, Zr, Hf): A stucy based on density-functional theory for superconductors"
The 14th Asian Workshop on First-Principles Electronic Structure Calculations (ASIAN-14): Oct. 31--Nov. 2, 2011; Takeda Hall, The University of Tokyo, Japan
poster (not peer-reviewed)P-063

Theses

Doctor thesis

"Quantitative Calculation of Superconducting Transition Temperatures by Density Functional Theory: Method Development and Its Applications"
Dept. Appl. Phys., submitted in Feb. 2014, (supervisor: Assoc. Prof. Ryotaro Arita)

Master thesis

"Ab initio Study on Superconductivity in β-LixZrNCl"
Dept. Appl. Phys., submitted in Feb. 2011, (supervisor: Prof. Masatoshi Imada)

Presentation (domestic)

11, 明石遼介
"高圧下硫化水素における高温超伝導の第一原理計算による解析"
大学院総合文化研究科物性グループ 物性セミナー 東京大学 駒場キャンパス 2015年7月24日 口頭発表(招待)

10, 明石遼介, 常行真司, 有田亮太郎
"多層構造における電子の軌道間ホッピング選択則と平坦バンド分散"
日本物理学会 2014年年次大会 早稲田大学 2015年3月21日--24日 口頭発表(査読無)

9, 明石遼介, 有田亮太郎
"プラズモン支援超伝導のための密度汎関数理論:プラズモン極近似を超えて"
日本物理学会 2013年年次大会 東海大学 2014年3月27日--30日 口頭発表(査読無)

8, 明石遼介, 有田亮太郎
"アルカリ金属ドープフラーレン:超伝導密度汎関数理論に基づく研究"
文部科学省科学研究費新学術領域 「コンピューティクスによる物質デザイン:複合相関と非平衡ダイナミクス」平成25年度第1回研究会 東京大学本郷キャンパス 武田先端知ビル 2013年7月8日--9日
口頭発表(selected)

7, 明石遼介, 有田亮太郎
"超伝導密度汎関数理論の展開:粒子・ホール非対称性とプラズモン・フォノン協力"
文部科学省科学研究費新学術領域 「コンピューティクスによる物質デザイン:複合相関と非平衡ダイナミクス」平成25年度第1回研究会 東京大学本郷キャンパス 武田先端知ビル 2013年7月8日--9日
ポスター発表(査読無)

6, 明石遼介
"プラズモン-フォノン協力機構のための超伝導密度汎関数理論"
日本原子力研究開発機構システム計算科学センター 研究室セミナー 2013年6月26日
口頭発表(招待)

5, 明石遼介, 中村和磨, 有田亮太郎
"動的電子遮蔽効果を考慮した超伝導密度汎関数理論"
日本物理学会 2013年年次大会 広島大学 2013年3月26日--29日
口頭発表(査読無)26aXM-6

4, 明石遼介, ○有田亮太郎
"超伝導密度汎関数理論によるフラーレン超伝導体の転移温度計算"
日本物理学会 2013年年次大会 広島大学 2013年3月26日--29日
口頭発表(査読無、非登壇)26pXF-1

3, 明石遼介, 中村和磨, 有田亮太郎
"電子・ホール非対称系のための超伝導密度汎関数理論"
日本物理学会 2012年秋季大会 横浜国立大学 2012年9月18日--21日
口頭発表(査読無)18pAD-4

2, 明石遼介, 中村和磨, 有田亮太郎, 今田正俊
"Layered nitrides β-LixMNCl Studied with Density-Functional Theory for Superconductivity
[層状窒化物β-MNCl (M = Ti, Zr, Hf) の超伝導密度汎関数理論による研究]"
第2回計算物質科学イニシアティブ (CMSI) 研究会「新物質・エネルギー創成を目指して」
東北大学 金属材料研究所 2012年1月30日--31日
ポスター発表(査読無) P-01

1, 明石遼介, 中村和磨, 有田亮太郎, 今田正俊
"超伝導密度汎関数理論による層状超伝導体MNCl(M=Ti, Zr, Hf)の転移温度評価"
日本物理学会 2011年秋季大会 富山大学 2011年9月21日--24日
口頭発表(査読無)24aGE-12