Search of novel quantum transport phenomena in a single domain of chiral superconductors

2010 Fiscal Year Final Research Report

• Project/Area Number: 21840004
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University (2010); Asahikawa Medical College (2009)
• Principal Investigator: NOBUKANE Hiroyoshi 北海道大学, 大学院・理学研究院, 助教 (60550663)
• Project Period (FY): 2009 – 2010
• Keywords: カイラル超伝導 / マヨラナフェルミオン / トポロジカル量子現象 / 単一ドメイン / 量子異常

Research Abstract

We found the parity-violating curves in a single domain of Sr_2RuO_4 superconductors through electric transport measurements. The results show that the Sr_2RuO_4 itself provides spontaneous magnetization. An applied magnetic field changes the chirality of the single domain. We suggest that the Majorana fermions are excited at the edge of Sr_2RuO_4.

Research Products

• [Journal Article] Majorana-Weyl fermions in(2+1)-dimensional superconductors (2011)
  • Author(s): H. Nobukane, A. Tokuno, T. Matsuyama, and S. Tanda, J. Phys
  • Journal Title: Conf. Ser Volume: (Accepted)
  • Peer Reviewed
• [Journal Article] STM spectroscopy on deuteratedκ-(BEDT-TTF-d[ n, n])_2Cu[ N(CN)_2] Br (2011)
  • Author(s): Y. Oka, R. Abe, H. Nobukane, N. Matsunaga, K. Nomura, K. Ichimura, and A. Kawamoto, J. Phys
  • Journal Title: Conf. Ser Volume: (Accepted)
  • Peer Reviewed
• [Journal Article] Majorana-Weyl fermions in the chiral superconductor Sr_2RuO_4 (2011)
  • Author(s): H. Nobukane, A. Tokuno, T. Matsuyama, S. Tanda
  • Journal Title: Physical Review B Volume: 83 144502(1)-(6) Pages: 144502(1)-(6)
  • Peer Reviewed
• [Journal Article] Transport properties in a single domain of microscale Sr_2RuO_4 single crystals (2010)
  • Author(s): H. Nobukane, K. Inagaki, S. Tsuchiya, Y. Asano, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, S. Tanda
  • Journal Title: Japanese Journal of Applied Physics Volume: 49 Pages: 020209(1)-(3)
  • Peer Reviewed
• [Journal Article] Parity-violating current-voltage curves in a single domain of Sr_2RuO_4 superconductors (2010)
  • Author(s): H. Nobukane, K. Inagaki, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, K. Konno, Y. Asano, S. Tanda, Physica B
  • Volume: 405
  • Pages: S277-S278
  • Peer Reviewed
• [Journal Article] Duality Breaking of Vortex Configuration in a Hierarchical Honeycomb Network (2009)
  • Author(s): S. Tsuchiya, T. Toshima, H. Nobukane, K. Inagaki, S. Tanda, Physical Review B
  • Volume: 80
  • Pages: 094502(1)-(4)
  • Peer Reviewed
• [Journal Article] Parity Violation in a Single Domain of Spin-Triplet Sr_2RuO_4 Superconductors (2009)
  • Author(s): H. Nobukane, K. Inagaki, K. Ichimura, K. Yamaya, S. Takayanagi, I. Kawasaki, K. Tenya, H. Amitsuka, K. Konno, Y. Asano, S. Tanda
  • Journal Title: Solid State Communication Volume: 149 Pages: 1212-1215
  • Peer Reviewed
• [Presentation] 1. Chiral Majorana edge excitations in Sr_2RuO_4 (2012)
  • Author(s): H. Nobukane, A. Tokuno, T. Matsuyama, K. Ichimura, K. Yamaya, S. Takayanagi, K. Inagaki, K. Tenya, H. Amitsuka, Y. Asano, K. Nomura, and S. Tanda
  • Organizer: Topological Quantum Phenomena in Condensed Matter with Broken Symmetries(TQP2012)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 20120516-20
• [Presentation] 有機超伝導体λ-(BETS)_2GaCl_4におけるSTM分 (2012)
  • Author(s): 光岡雄基、一ノ宮弘樹、延兼啓純、松永悟明、野村一成、ファティマ・スルタナ、小林昭子、小林速男
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-0327
• [Presentation] Majorana fermions at the edge of the chiral superconductor Sr_2RuO_4 (2011)
  • Author(s): H. Nobukane, A. Tokuno, T. Matsuyama, K. Ichimura, K. Yamaya, S. Takayanagi, K. Inagaki, K. Tenya, H. Amitsuka, Y. Asano, K. Nomura, and S. Tanda
  • Organizer: 対称性の破れた凝縮系におけるトポロジカル量子現象第2回領域研究会
  • Place of Presentation: 岡山大学
  • Year and Date: 20111217-19
• [Presentation] カイラル超伝導体Sr_2RuO_4におけるマヨラナ粒子の観測II (2011)
  • Author(s): 延兼啓純、得能光行、松山豊樹、丹田聡
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 20110921-24
• [Presentation] 部分重水素置換κ-(BEDT-TTF-d[ n, n])_2Cu[ N(CN)_2] Brの超伝導ギャップ3 : STM分光 (2011)
  • Author(s): 岡雄基、阿部良太、延兼啓純、松永悟明、野村一成、市村晃一、河本充司
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 20110921-24
• [Presentation] Majorana-Weyl fermions in(2+1)-dimensional superconductors (2011)
  • Author(s): H. Nobukane, A. Tokuno, T. Matsuyama, S. Tanda
  • Organizer: 26th international conference on Low Temperature Physics(LT26)
  • Place of Presentation: Beijing, China
  • Year and Date: 20110810-17
• [Presentation] STM Spectroscopy on deuteratedκ-(BEDT-TTF-d[ n, n])_2Cu[ N(CN)_2] Br (2011)
  • Author(s): Y. Oka, R. Abe, H. Nobukane, N. Matsunaga, K. Nomura, K. Ichimura, A. Kawamoto
  • Organizer: 26th international conference on Low Temperature Physics(LT26)
  • Place of Presentation: Beijing, China
  • Year and Date: 20110810-17
• [Presentation] カイラル超伝導体Sr_2RuO_4におけるマヨラナ粒子の観測 (2011)
  • Author(s): 延兼啓純、得能光行、松山豊樹、丹田聡
  • Organizer: 日本物理学会第66年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 20110325-28
• [Presentation] 部分重水素置換κ-(BEDT-TTF)_2Cu[ N(CN)_2] Brの超伝導ギャップ2 : STM分光 (2011)
  • Author(s): 岡雄基、阿部良太、延兼啓純、松永悟明、野村一成、市村晃一、河本充司
  • Organizer: 日本物理学会第66年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 20110325-28
• [Presentation] 階層構造超伝導ネットワークにおけるボルテックス配置の双対性の破れ (2010)
  • Author(s): 土屋聡、豊嶋剛司、延兼啓純、稲垣克彦、市村晃一、丹田聡
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 20100320-23
• [Presentation] Parity violation in a chiral single domain Sr_2RuO_4 : Implication of Majorana fermions (2009)
  • Author(s): H. Nobukane, A. Tokuno, T. Matsuyama, and S. Tanda
  • Organizer: I. F. Schegolev Memorial Conference Low-Dimensional Metallic and Superconducting Systems
  • Place of Presentation: Chernogolovka, Russia
  • Year and Date: 20091011-16
• [Presentation] 単一ドメインSr_2RuO_4におけるパリティ破れの発見 (2009)
  • Author(s): 延兼啓純、稲垣克彦、市村晃一、山谷和彦、高柳滋、川崎郁斗、天谷健一、網塚浩、金野幸吉、浅野泰寛、本間龍也、丹田聡
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 20090925-28
• [Presentation] Parity-violating current-voltage curves in a single domain of Sr2_RuO_4 superconductors (2009)
  • Author(s): H. Nobukane, K. Inagaki, K. Ichimura, K. Yamaya, S. Takayanayagi, I. Kawasaki, K. Tenya, H. Amitsuka, K. Konno, Y. Asano, S. Tanda
  • Organizer: The 8th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets(ISCOM 2009)
  • Place of Presentation: Hokkaido
  • Year and Date: 20090912-17
• [Remarks]
  • URL: http://exp-ap.eng.hokudai.ac.jp/~nobukane/wiki/index.php