Theory of nonlinear response induced by electric field in condensed-matter Dirac systems

• Project/Area Number: 25400313
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Hokkaido University
• Principal Investigator: SUZUURA Hidekatsu 北海道大学, 工学(系)研究科(研究院), 准教授 (10282683)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: ディラック電子 / グラフェン / スピン・軌道相互作用 / 光学応答 / 輸送現象 / トポロジカル絶縁体 / 光吸収 / 電磁応答 / ナノチューブ / 電場変調光吸収 / 遮蔽効果 / ナノリボン / スピンホール効果 / スピン偏極

Outline of Final Research Achievements

Electromagnetic responses in condensed-matter Dirac systems deeply reflect its singular electronic states. We have theoretically studied the enhancement of singular behaviors in optical responses and transport properties due to external electric fields in the Dirac systems. We have shown that external electric fields induce the red shift of strong optical absorption peak due to excitons in carbon nanotubes and that static screening of external electric fields due to edge states in graphene nanoribbons is strongly modulated by electrostatic electron doping. Further, we have also shown that current-induced spatial distributions of spins in topological insulators are highly dependent on the configurations of electrical contacts with external leads.

Research Products

• [Int'l Joint Research] Columbia University(米国)
• [Journal Article] Tunable electronic correlation effects in nanotube-light interactions (2015)
  • Author(s): Y. Miyauchi, Z. Zhang, M. Takekoshi, Y. Tomio, H. Suzuura, V. Perebeinos, V. V. Deshpande, C. Lu, S. Berciaud, P. Kim, J. Hone, T. F. Heinz
  • Journal Title: Physical Review B Volume: 92 Issue: 20 Pages: 205407-205407
  • DOI: 10.1103/physrevb.92.205407
  • NAID: 120005712921
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effects of Dynamic Screening on Excitons in Metallic Carbon Nanotubes (2015)
  • Author(s): Y. Tomio, H. Suzuura
  • Journal Title: JPS Conference Proceedings Volume: 4 Pages: 0120061-4
  • DOI: 10.7566/jpscp.4.012006
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin relaxation in a zinc-blende (110) symmetric quantum well with δ doping (2014)
  • Author(s): H. Akera, H. Suzuura, and Y. Egami
  • Journal Title: Phys. Rev. B Volume: 89 Issue: 7 Pages: 75314-75314
  • DOI: 10.1103/physrevb.89.075314
  • NAID: 120005438224
  • Peer Reviewed
• [Presentation] グラフェンと巨大Rashba系における弱磁場ホール効果の理論 (2016)
  • Author(s): 安藤恒也, 鈴浦秀勝
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学泉キャンパス（仙台市）
  • Year and Date: 2016-03-21
• [Presentation] ラシュバ型スピン・軌道相互作用を有する2次元電子系における弱磁場ホール効果 (2015)
  • Author(s): 鈴浦秀勝，安藤恒也
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学千里山キャンパス（吹田市）
  • Year and Date: 2015-09-18
• [Presentation] グラフェンナノリボン電場変調光吸収スペクトルにおける静電遮蔽の効果 (2015)
  • Author(s): 西田寛太朗, 鈴浦秀勝, 明楽浩史
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学千里山キャンパス（吹田市）
  • Year and Date: 2015-09-16
• [Presentation] Electric-field-induced modulation of absorption spectra in graphene nanoribbons (2015)
  • Author(s): Kantaro Nishida, Hidekatsu Suzuura, Hiroshi Akera
  • Organizer: 21st International Conference on Electronic Properties of Two-Dimensional Systems
  • Place of Presentation: Sendai International Center（仙台市）
  • Year and Date: 2015-07-28
  • Int'l Joint Research
• [Presentation] Singular Hall effect in two-dimensional Rashba systems with long-range impurities (2015)
  • Author(s): Hidekatsu Suzuura, Tsuneya Ando
  • Organizer: 21st International Conference on Electronic Properties of Two-Dimensional Systems
  • Place of Presentation: Sendai International Center（仙台市）
  • Year and Date: 2015-07-27
  • Int'l Joint Research
• [Presentation] グラフェンナノリボンの電場変調光吸収スペクトル (2015)
  • Author(s): 西田寛太朗，鈴浦秀勝，明楽浩史
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学早稲田キャンパス（新宿区）
  • Year and Date: 2015-03-24
• [Presentation] 2次元トポロジカル絶縁体における電流誘起電子スピンの空間構造 (2014)
  • Author(s): 河合遼太，鈴浦秀勝
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学 湘南キャンパス（平塚）
• [Presentation] zinc-blende(110)対称量子井戸におけるスピン緩和とLOフォノン散乱 (2014)
  • Author(s): 明楽浩史，鈴浦秀勝，江上喜幸
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学 湘南キャンパス（平塚）
• [Presentation] 2次元半導体における電流誘起型スピン偏極の空間分布：4端子系の場合 (2013)
  • Author(s): 河合遼太，鈴浦秀勝
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学常三島キャンパス（徳島）
• [Presentation] デルタドープGaAs(110)対称量子井戸におけるスピン緩和時間の電子密度依存性 (2013)
  • Author(s): 明楽浩史，鈴浦秀勝，江上喜幸
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学常三島キャンパス（徳島）