Proximity effect in unconventional superconductors

• Project/Area Number: 19540352
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University
• Principal Investigator: ASANO Yasuhiro Hokkaido University, 大学院・工学研究科, 講師 (20271637)
• Co-Investigator(Kenkyū-buntansha): 田仲 由喜夫 名古屋大学, 大学院・工学研究科, 准教授 (40212039)
• Co-Investigator(Renkei-kenkyūsha): TANAKA Yukio 名古屋大学, 大学院・工学研究科, 准教授 (40212039)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 超伝導 / メゾスコピック物理

Research Abstract

超伝導の対称性は、金属で発現するスピン1重項対称性と、ルテニウム酸化物や重い電子系で有力とされるスピン3重項対称性に大別される。特にスピン3重項超伝導の物理はきわめて興味深く、注目を集めている。我々は、理論的な手法にのっとり超伝導近接効果を調べ、この2種類を明確に区別する新しい実験方法を提案した。

Research Products

• [Journal Article] Anomalous Transport through the p-wave Superconducting Channel in the 3-K Phase of Sr_2RuO_4 (2008)
  • Author(s): H. Kambara, S. Kashiwaya, H. Yaguchi, Y. Asano, Y.Tanaka, Y. Maeno
  • Journal Title: Physical Review Letters 101
  • NAID: 120001151505
  • Peer Reviewed
• [Journal Article] Electron Transport of a Ferromagnet-Superconductor junction on Graphene (2008)
  • Author(s): Y. Asano, T. Yoshida, Y. Tanaka, and A.A. Golubov
  • Journal Title: Physical Review B78
  • NAID: 120001151507
  • Peer Reviewed
• [Journal Article] Quantum transport in a normal metal/odd-frequency superconductor junction (2008)
  • Author(s): J.Linder, T.Yokoyama, Y.Tanaka, Y. Asano and Asle Sudbo
  • Journal Title: Physical Review B77 Pages: 174505-174505
  • NAID: 120001151509
  • Peer Reviewed
• [Journal Article] Shape of Cooper pair in a Normal-metal/Superconductor Junction (2008)
  • Author(s): Y. Tanaka, Y. Asano, and A.A. Golubov
  • Journal Title: Physical Review B77
  • NAID: 120001151508
  • Peer Reviewed
• [Journal Article] Tunneling study through analysis of spatial variations of the pair potential in diffusive normal metal/insulat or/high-Tc superconductor junctions (2008)
  • Author(s): I. Shigeta, 他4名
  • Journal Title: Journal of Physics and Chemistry of Solids 69 Pages: 3042-3045
  • Peer Reviewed
• [Journal Article] Josephson Current through a Half Metal at Low Temperatu res (2008)
  • Author(s): Y. Sawa, 他2名
  • Journal Title: Journal of Physics and Chemistry of Solids 69 Pages: 3247-3249
  • Peer Reviewed
• [Journal Article] Conductance in a T-Shaped Proximity Structure of a p-wave Superconductor (2008)
  • Author(s): Y. Asano, 他3名
  • Journal Title: Journal of Physics and Chemistry of Solids 69 Pages: 3211-3213
  • Peer Reviewed
• [Journal Article] Theory of Proximity Effect in Unconventional Supercondu. ctor Junctions (2008)
  • Author(s): Y. Tanaka, 他4名
  • Journal Title: Controllable Quantum States Pages: 168-174
  • Peer Reviewed
• [Journal Article] Little-Parks Oscillations in Chiral-$p$-wave Supercondu cting Rings (2008)
  • Author(s): M. Takigawa, 他2名
  • Journal Title: Controllable Quantum States Pages: 155-160
  • Peer Reviewed
• [Journal Article] Quantum Dissipation Due to the Zero Energy Bound States in High-Tc Superconductor Junctions (2008)
  • Author(s): S. Kawabata, 他5名
  • Journal Title: Controllable Quantum States Pages: 143-148
  • Peer Reviewed
• [Journal Article] Theory of Josephson Effect in Diffusive d-wave Junctions (2008)
  • Author(s): T. Yokoyama, 他3名
  • Journal Title: Controllable Quantum States Pages: 136-142
  • Peer Reviewed
• [Journal Article] Threshohold Temperature of Zero-bias Conductance Peak and Zero-bias Conductance Dip in Diffusive Normal Metal / Superconductor Junctions (2008)
  • Author(s): I. Shigeta, 他4名
  • Journal Title: Controllable Quantum States Pages: 111-117
  • Peer Reviewed
• [Journal Article] Influence of Magnetic Impurities on Josephson Current in SNS junctions (2008)
  • Author(s): T. Yokoyama, 他4名
  • Journal Title: Controllable Quantum States Pages: 9-14
  • Peer Reviewed
• [Journal Article] Anomalous Transport through the p-wave Superconducting Channel in the 3-K Phase of Sr2Ru04 (2008)
  • Author(s): H. Kambara, 他5名
  • Journal Title: Physical Review Letters 101
  • Peer Reviewed
• [Journal Article] Flat Rotation Curves in Chern-Simons Modified Gravity (2008)
  • Author(s): K. Konno, 他3名
  • Journal Title: Physical Review D 78
  • Peer Reviewed
• [Journal Article] Electron Transport of a Ferromagnet-Superconductor junc tion on Graphene (2008)
  • Author(s): Y. Asano, 他3名
  • Journal Title: Physical Review B 78
  • NAID: 120001151507
  • Peer Reviewed
• [Journal Article] Quantum transport in a normal metal/odd-frequency super conductor junction (2008)
  • Author(s): J. Linder, 他4名
  • Journal Title: Physical Review B 77
  • Peer Reviewed
• [Journal Article] Shape of Cooper pair in a Normal-metal/Superconductor Junction (2008)
  • Author(s): Y. Tanaka, 他2名
  • Journal Title: Physical Review B 77
  • NAID: 120001151508
  • Peer Reviewed
• [Journal Article] Cooper Pair Transport and Macroscopic Quantum Dynamics in Josephson Junctions through Ferromagnetic Insulators (2008)
  • Author(s): S. Kawabata, 他4名
  • Journal Title: Physica C 468 Pages: 701-704
  • Peer Reviewed
• [Journal Article] Quasiparticle Density of States in a Half Metal in the Presence of Odd-freuuencv Cooper Pair (2008)
  • Author(s): Y. Asano, 他3名
  • Journal Title: physica status solidi (a) 205 Pages: 1023-1025
  • Peer Reviewed
• [Journal Article] Conductance Spectroscopy of Spin-triplet Supercouductors (2007)
  • Author(s): Y. Asano, Y. Tanaka, A.A. Golubov, and S. Kashiwaya
  • Journal Title: Physical Review Letters 99 Pages: 67005-67005
  • Peer Reviewed
• [Journal Article] Josephson Effect due to Odd Frequency Pairs in Diffusive Half-metals (2007)
  • Author(s): Y. Asano, Y. Tanaka, A.A. Golubov
  • Journal Title: Physical Review Letters 98 Pages: 107002-107002
  • Peer Reviewed
• [Journal Article] Odd-frequency Pairs and Josephson Current through a Strong Ferromagnet (2007)
  • Author(s): Y. Asano, Y. Sawa, Y. Tanaka, A.A. Golubov
  • Journal Title: Physical Review B 76 Pages: 224525-224525
  • NAID: 120001151498
  • Peer Reviewed
• [Journal Article] Theory of Tunneling Spectroscopy in the Larkin-Ovchinnikov State (2007)
  • Author(s): Y.Tanaka, Y.Asano, M.Ichioka, and S.Kashiwaya
  • Journal Title: Physical Review Letters 98 Pages: 77001-77001
  • NAID: 120002306933
  • Peer Reviewed
• [Journal Article] Conductance Spectroscopy of Spin-triplet Supercouductivity (2007)
  • Author(s): Y. Asano, ほか3名
  • Journal Title: Physical Review Letters 99
  • Peer Reviewed
• [Journal Article] Odd-frequency Pairs and Josephson Current through a Strong Ferromagnet (2007)
  • Author(s): Y. Asano, ほか3名
  • Journal Title: Physical Review B 76
  • NAID: 120001151498
  • Peer Reviewed
• [Journal Article] Josephson pi-state due to Spin-active Junction Interfaces (2007)
  • Author(s): Y. Asano, ほか2名
  • Journal Title: International Journal of Modern Physics B 21 Pages: 3395-3397
  • Peer Reviewed
• [Journal Article] Josephson Current through a Half Metal (2007)
  • Author(s): Y. Asano, ほか2名
  • Journal Title: Physica C 463-465 Pages: 1319-1320
  • Peer Reviewed
• [Journal Article] Anomalous Josephson Current by Odd Frequency Cooper Pairs (2007)
  • Author(s): Y. Asano, ほか2名
  • Journal Title: Physica C 460-462 Pages: 1327-1328
  • Peer Reviewed
• [Presentation] Andreev reflection of a helical superconductor (2008)
  • Author(s): 浅野泰寛
  • Organizer: 「スーパークリーン物質」特定領域成果報告会
  • Place of Presentation: 奈良県新公会堂(奈良市)
  • Year and Date: 2008-11-26
• [Presentation] Spin Josephson Effect in Triplet Superconductors (2008)
  • Author(s): Y. Asano
  • Organizer: The 23rd Nishinomiya-Yukawa Memorial International Workshop Spin Transport in Co ndensed Matter
  • Place of Presentation: 京都大学(京都市)
  • Year and Date: 2008-11-26
• [Presentation] グラフェン上の強磁性/超伝導接合におけるアンドレーエフ反射 (2008)
  • Author(s): 浅野泰寛
  • Organizer: 日本物理学会
  • Place of Presentation: 岩手大学(盛岡市)
  • Year and Date: 2008-09-22
• [Presentation] 超伝導体/強磁性体接合の最近の話題 (2008)
  • Author(s): 浅野泰寛
  • Organizer: 研究会「不均一超伝導超流動状態と量子物理」YITP-W-08-05
  • Place of Presentation: 京都大学(京都市)
  • Year and Date: 2008-08-01
• [Presentation] Josephson Effect in Chiral p-wave Superconductors (2008)
  • Author(s): Y. Asano
  • Organizer: Spin Helicity and Chirality in Superconductor and Semiconductor Nanostructures
  • Place of Presentation: Karlsurhe university, Karlsurhe, Germany
  • Year and Date: 2008-07-15
• [Presentation] Josephson Effect in Chiral p-wave Superconductors (2008)
  • Author(s): Y. Asana
  • Organizer: Spin Helicity and Chirality in Superconduc tor and Semiconductor Nanostructures
  • Place of Presentation: Karlsurhe university, Karlsruhe, Germany
  • Year and Date: 2008-07-15
• [Presentation] Conductance Spectroscopy of Spin-triplet Superconductors (2008)
  • Author(s): Y.Asano
  • Organizer: Probing superconductivity at the nanoscale
  • Place of Presentation: Hesperia Lucentum Hotel, Alicante, Spain
  • Year and Date: 2008-06-05
• [Presentation] Conductance Spectroscopy of Spin-triplet Superconductors (2008)
  • Author(s): Y. Asano
  • Organizer: Probing superconductivity at the nanoscale
  • Place of Presentation: Hesperia Lucentum Hot el, Alicante, Spain
  • Year and Date: 2008-06-05
• [Presentation] Odd-frequency Pairing State in Superconductor/Ferromagnet Junctions (2008)
  • Author(s): Y. Asano
  • Organizer: 日本物理学会63回年次大会,領域3-6シンポジウム「強磁性体・超伝導体接合の物理の新展開」
  • Place of Presentation: 近畿大学東大阪市
  • Year and Date: 2008-03-23
• [Presentation] Odd-frequency Pairing State in Superconductor / Ferromagnet Junctions (2008)
  • Author(s): Y. Asano
  • Organizer: 日本物理学会63回年次大会, 領域3-6シンポジウム「強磁性体・超伝導体接合の物理の新展開」
  • Place of Presentation: 大阪府東大阪市近畿大学
  • Year and Date: 2008-03-23
• [Presentation] Conductance Spectroscopy of Spin-triplet Superconductors (2007)
  • Author(s): 浅野泰寛
  • Organizer: 超伝導が拓く物性科学の最前線-科研費4特定領域研究合同研究会--
  • Place of Presentation: 首都大学東京, 東京
  • Year and Date: 2007-12-14
• [Presentation] スピン3重項超伝導体のコンダクタンス分光 (2007)
  • Author(s): 浅野泰寛
  • Organizer: 超伝導が拓く物性科学の最前線--科研費 4特定領域研究 合同研究会--
  • Place of Presentation: 東京 首都大学東京
  • Year and Date: 2007-12-14
• [Presentation] Conductance Spectroscopy of Spin-triplet Superconductors (2007)
  • Author(s): Y. Asano
  • Organizer: MTI International Argonne Fall Workshop on Nanophysics VII, 2007
  • Place of Presentation: National Center for Theoretical Sciences, Hsinchu, Taiwan
  • Year and Date: 2007-12-06
• [Presentation] Conductance Spectroscopy of Spin-triplet Superconductors (2007)
  • Author(s): Y. Asano
  • Organizer: MTI International Argonne Fall Workshop on Nanophysics VII
  • Place of Presentation: National Center for Theoretical Sciences, Hsinchu, Taiwan
  • Year and Date: 2007-12-06
• [Presentation] Josephson Current through a Strong Ferromagnet and Odd-frequency Pairs (2007)
  • Author(s): Y.Asano
  • Organizer: Physics of Nanoscale Superconducting Heterostructures
  • Place of Presentation: Lorentz Center in Leiden Univ., Leiden, The Netherlands
  • Year and Date: 2007-07-04
• [Presentation] Odd-frequency Cooper Pairs in Ferromagnet/Superconductor Junctions (2007)
  • Author(s): Y. Asano
  • Organizer: Nanoscale Superconductors and their Applications
  • Place of Presentation: Lorentz Center in Leiden Univ., Leiden, The Netherlands
  • Year and Date: 2007-07-04
• [Presentation] Proximity Effect in Half metals and Odd-frequency Cooper Pairs (2007)
  • Author(s): Y. Asano
  • Organizer: International Conference on Nanoscale Magnetism
  • Place of Presentation: Lorentz Center in Leiden Univ., Leiden, The Netherlands
  • Year and Date: 2007-06-28
• [Remarks]
  • URL: http://zvine-ap.eng.hokudai.ac.jp/~asano/
• [Remarks]
  • URL: http://zvine-ap.eng.hokudai.ac.jp/~asano/