Material Search and Investigation of Electronic Properties in Electric-Field-Induced Quantum Phases

2013 Fiscal Year Final Research Report

• Project/Area Number: 24740222
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: KASAHARA Yuichi 東京大学, 工学(系)研究科(研究院), 助教 (10511941)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 高温超伝導 / 電界誘起超伝導

Research Abstract

In this study, we have investigated material phases induced by electric field effect, so-called electric-field-induced quantum phases. We have searched new phases and constructed new methods for material search. We found that normal and superconducting properties as well as electronic states in the field-induced phases are markedly different from bulk materials. Moreover, we have developed a new device for spin manipulation. Switching of spin-current-induced voltage by electric field was demonstrated.

Research Products

• [Journal Article] Interface transport properties in ion-gated nano-sheets (2013)
  • Author(s): J. T. Ye, Y. J. Zhang, Y. Kasahara, and Y. Iwasa
  • Journal Title: European Physical Journal Special Topics Volume: Vol.222 Pages: 1185-1201
  • DOI: 10.1140/epjst/e2013-01914-0
  • Peer Reviewed
• [Journal Article] Correlation-Enhanced Effective Mass of Two-Dimensional Electrons in Mg_xZn_<1->xO/ZnO Heterostructures (2012)
  • Author(s): Y. Kasahara, Y. Oshima, J. Falson, Y. Kozuka, A. Tsukazaki, M. Kawasaki, Y. Iwasa
  • Journal Title: Physical Review Letters Volume: Vol.109 Pages: 246401/1-5
  • DOI: 10.1103/PhysRevLett.109.246401
  • Peer Reviewed
• [Journal Article] Bulk superconductivity and fully gapped superconducting state in Ba-doped phenanthrene (2012)
  • Author(s): Yuichi Kasahara, Yuki Takeuchi, Yoshihiro Iwasa
  • Journal Title: Physical Review B Volume: Vol.85 Pages: 214520/1-5
  • DOI: 10.1103/PhysRevB.85.214520
  • Peer Reviewed
• [Presentation] ZrNCl電界誘起超伝導の2次元的な磁束ダイナミクス (2014)
  • Author(s): 斎藤優,叶劍挺,笠原裕一,野島勉,岩佐義宏
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学、神奈川県
  • Year and Date: 2014-03-27
• [Presentation] Two dimensionality in electric field induced superconductivity (2014)
  • Author(s): Y. Saito, J. T. Ye, Y. J. Zhang, Y. Kasahara, T. Nojima, Y. Iwasa
  • Organizer: American Physical Society March Meeting 2014
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 2014-03-06
• [Presentation] Spin frustration and magnetic ordering in the Mott insulating fcc-Cs_3C_60 (2014)
  • Author(s): Y. Kasahara, Y. Takeuchi, T. Itou, Y. Iwasa, D. Arcon, M. J. Rosseinsky, K. Prassides
  • Organizer: American Physical Society March Meeting 2014
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 2014-03-04
• [Presentation] C_<60>化合物における超伝導−モット絶縁体転移と上部臨界磁場 (2013)
  • Author(s): 笠原裕一
  • Organizer: 東京大学物性研究所短期研究会「極限強磁場科学ー場、物質、プローブのリンクから融合へ」
  • Place of Presentation: 東京大学物性研究所、千葉県
  • Year and Date: 2013-11-01
  • Invited
• [Presentation] 電界誘起超伝導の2次元性 (2013)
  • Author(s): 斎藤優,叶劍挺,笠原裕一,野島勉,岩佐義宏
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学、徳島県
  • Year and Date: 2013-09-27
• [Presentation] Specific Heat Study of A_3C_<60> Fullerides near the Mott Transition (2013)
  • Author(s): Yuichi Kasahara
  • Organizer: Workshop on Superconductivity and Magnetism associated with Geometry and Dimensionality from Organics to Inorganics (SuMO2013)
  • Place of Presentation: 東北大学、宮城県
  • Year and Date: 2013-05-16
  • Invited
• [Presentation] ZnO二次元電子系における有効質量の増大と電子相関 (2013)
  • Author(s): 笠原裕一,大島勇吾,Joseph Falson,小塚裕介,塚崎敦,川崎雅司,岩佐義宏
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-28
• [Presentation] Correlation enhanced effective mass of two-dimensional electrons in Mg_xZn_<1->xO/ZnO Heterostructures (2013)
  • Author(s): Y. Kasahara, Y. Oshima, J. Falson, Y. Kozuka, A. Tsukazaki, M. Kawasaki, Y. Iwasa
  • Organizer: American Physical Society March Meeting 2013
  • Place of Presentation: Baltimore, USA
  • Year and Date: 2013-03-20
• [Presentation] Materials science and phase control using electric double layer transistors (2012)
  • Author(s): Y. Kasahara
  • Organizer: The 6th International Workshop on Advanced Materials Science and Nanotechnology (IWAMSN2012)
  • Place of Presentation: Ha Long City, Vietnam
  • Year and Date: 2012-11-01
  • Invited
• [Presentation] 重い電子系の電界制御 (2012)
  • Author(s): 綿重達哉,下澤雅明,安元智司,中村昌幸,池田浩章,笠原裕一,岩佐義宏,寺嶋孝仁,芝内孝禎,松田祐司
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-21
• [Presentation] Baドープフェナンスレン超伝導体の電子比熱 (2012)
  • Author(s): 笠原裕一,竹内裕紀,Xianhui Chen,岩佐義宏
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20
• [Presentation] Magnetic detection of field-induced superconductivity (2012)
  • Author(s): Yuichi Kasahara
  • Organizer: EDLT-Tokyo : an International Workshop on Electric Double Layer Transistors
  • Place of Presentation: 東京大学
  • Year and Date: 2012-09-10
  • Invited
• [Remarks]
  • URL: http://iwasa.t.u-tokyo.ac.jp/member/kasahara/CV_Kasahara.pdf