Novel phenomena and strong correlation effects in noncentrosymmetric superconductors

• Project/Area Number: 18540347
• 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: Kyoto University
• Principal Investigator: FUJIMOTO Satoshi Kyoto University, 大学院・理学研究科, 准教授 (10263063)
• Project Period (FY): 2006 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,830,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥630,000); Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
• Keywords: 強相関系 / 超伝導 / 空間反転対称性 / マヨラナフェルミオン / トポロジカル秩序 / 重い電子系 / 電子相関 / 臨界磁場 / 磁性 / 強相関電子系 / 異方的超伝導 / フェルミ液体 / NMR

Research Abstract

We have studied theory of noncentrosymmetric superconductors which were discovered recently. It has turned out that in these systems novel electromagnetic phenomena are possible to occur because of broken inversion symmetry. In particular, we have shown that noncentrosymmetric superconductors can be enormously robust against pair breaking effects raised by applied magnetic field compared to conventional superconductors known so far.

Research Products

• [Journal Article] Spin fluctuation and superconductivity in noncentrosymmetric heavy fermion systems CeRhSi3, CeIrSi3 (2010)
  • Author(s): Y. Tada, N. Kawakami, S. Fujimoto
  • Journal Title: Physical Review B 81
  • Peer Reviewed
• [Journal Article] Non-Abelian Topological Order in s-Wave Superfluids of Ultracold Fermionic Atoms (2009)
  • Author(s): M. Sato, Y. Takahashi, S. Fujimoto
  • Journal Title: Physical Review Letters 103
  • Peer Reviewed
• [Journal Article] Unambiguous probe of parity mixing of Cooper pairs in noncentrosymmetric superconductors (2009)
  • Author(s): S. Fujimoto
  • Journal Title: Physical Review B 79
  • Peer Reviewed
• [Journal Article] Topological Phases of Noncentrosymmetric Superconductors: Edge States, Majorana Fermions, and the Non-Abelian Statistics (2009)
  • Author(s): M. Sato, S. Fujimoto
  • Journal Title: Physical Review B 79
  • Peer Reviewed
• [Journal Article] Pairing state at an interface of Sr2Ru04: parityi-mixing, restored time-reversal symmetry, and topological superconductivity (2009)
  • Author(s): Y. Tada, N. Kawakami, S. Fujimoto
  • Journal Title: New Journal of Physics 11
  • Peer Reviewed
• [Journal Article] Unambiguous probe of parity mixing of Cooper pairs in noncentrosymmetric superconductors (2009)
  • Author(s): S.Fujimoto
  • Journal Title: Physical Review B 79
  • Peer Reviewed
• [Journal Article] Non-Abelian Topological Order in s-Wave Superfluids of Ultracold Fermionic Atoms (2009)
  • Author(s): M.Sato, Y.Takahashi, S.Fujimoto
  • Journal Title: Rhysical Review Letters 103
  • Peer Reviewed
• [Journal Article] Topological Phases of Noncentrosymmetric Superconductors : Edge States, Majorana Fermions, and the Non-Abelian Statistics (2009)
  • Author(s): M. Sato and S. Fujimoto
  • Journal Title: Physical Review B79
  • Peer Reviewed
• [Journal Article] Colossal Enhancement of Upper Critical Fields in Noncentrosymmetric Heavy Fermion Superconductors near Quantum Criticality: CeRhSi3 and CeIrSi3 (2008)
  • Author(s): Y. Tada, N. Kawakami, S. Fujimoto
  • Journal Title: Physical Review Letters 101
  • Peer Reviewed
• [Journal Article] Topological order and non-Abelian statistics in noncentrosymmetric s-wave superconductors (2008)
  • Author(s): S. Fujimoto
  • Journal Title: Physical Rerview B 77
  • Peer Reviewed
• [Journal Article] Fractional Flux Quanta at Intrinsic Metallic Interfaces of Noncentrosymmetric Superconductors (2008)
  • Author(s): C. Iniotakis, S. Fujimoto, M. Sigrist
  • Journal Title: Journal of the Physical Society of Japan 77
  • NAID: 110006914818
  • Peer Reviewed
• [Journal Article] Microscopic Mechanism and Pairing Symmetry of Superconductivity in the Noncentrosymmetric Heavy Fermion Systems CeRhSi3 and CeIrSi3 (2008)
  • Author(s): Y. Tada, N. Kawakami, S. Fujimoto
  • Journal Title: Journal of the Physical Society of Japan 77
  • NAID: 130005436415
  • Peer Reviewed
• [Journal Article] Colossal Enhancement of Upper Critical Fields in oncentrosymmetric Heavy Fermion Superconductors near Quantum Criticality : CeRhSi3 and CeIrSi3 (2008)
  • Author(s): Y. Tada, N. Kawakami and S. Fujimoto
  • Journal Title: Physical Review Letters 101
  • Peer Reviewed
• [Journal Article] Topological order and non-Abelian statistics in noncentrosymmetric s-wave superconductors (2008)
  • Author(s): S. Fujimoto
  • Journal Title: Physical Rerview B77
  • Peer Reviewed
• [Journal Article] Colossal Enhancement of Upper Critical Fields in Noncentrosymmetric Heavy Fermion Superconductors near Quantum Critlcality : CeRhSi3 and CeIrSi3 (2008)
  • Author(s): Y. Tada, N. Kawakami, S. Fujimoto
  • Journal Title: Physical Review Letters 101
  • Peer Reviewed
• [Journal Article] Thermodynamics of impurities in the anisotropic Heisenberg spion-1/2 chain (2008)
  • Author(s): J. Sirker, S. Fujimoto, N. Laflorencie, 5. Eggert, I. Affleck
  • Journal Title: Journal of Statistical Mechanics: Theory and Experiment 2
  • Peer Reviewed
• [Journal Article] Theory of parity-violated Cooper pairs in weakly noncentrosymmetric superconductors (2007)
  • Author(s): S. Fujimoto
  • Journal Title: Physical Review B 76
  • Peer Reviewed
• [Journal Article] Fermi liquid theory for heavy fermion superconductors without inversion symmetry: Magnetism and transport coefficients (2007)
  • Author(s): S. Fujimoto
  • Journal Title: Journal of the Physical Society of Japan 76
  • NAID: 110006240213
  • Peer Reviewed
• [Journal Article] Electron Correlation and Pairing States in Superconductors without Inversion Symmetry (2007)
  • Author(s): S. Fujimoto
  • Journal Title: Journal of the Physical Society of Japan 76
  • NAID: 110006273164
  • Peer Reviewed
• [Journal Article] Theory of parity-violated Cooper pairs in weakly noncentrosymmetric superconductors (2007)
  • Author(s): S. Fujimoto
  • Journal Title: Physical Review B76
  • Peer Reviewed
• [Journal Article] Fermi liquid theory for heavy fermion superconductors without inversion symmetry : Magnetism and transport coefficients (2007)
  • Author(s): S. Fujimoto
  • Journal Title: Journal of the Physical Society of Japan 76
  • NAID: 110006240213
  • Peer Reviewed
• [Journal Article] Fermi liquid theory for heavy fermion superconductors without inversion symmetry : Magnetism and transport coefficients (2007)
  • Author(s): S.Fujimoto
  • Journal Title: Journal of the Physical Society of Japan 76 Pages: 34712-34712
  • NAID: 110006240213
• [Journal Article] Emergent Nodal Excitations due to coexistence of superconductivity and antiferomagnetism : Cases with and without inversion symmetry (2006)
  • Author(s): S.Fujimoto
  • Journal Title: Journal of the Physical Society of Japan 75 Pages: 83704-83704
• [Presentation] 不均一超伝導状態におけるトポロジカル・ホール効果 (2010)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学津島キャンパス
  • Year and Date: 2010-03-22
• [Presentation] Topological Phases of Noncentrosymmetric Superconductors and Superfluids (2010)
  • Author(s): 藤本聡
  • Organizer: IPMU Focus week, Condensed Matter Physics Meets High Energy Physics
  • Place of Presentation: 東京大学IPMU
  • Year and Date: 2010-02-09
• [Presentation] 空間反転対称性のない超伝導体におけるクーパー対のパリティ混合の検出法について (2009)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] Theory of Noncentrosymmetric Superconductors (2009)
  • Author(s): 藤本聡
  • Organizer: Novel Spin Pairing 2009
  • Place of Presentation: 京都大学基礎物理学研究所
  • Year and Date: 2009-09-16
• [Presentation] Theory of Noncentrosymmetric Superconductors: Microscopic Mechanism and Novel Electromagnetic Properties (2009)
  • Author(s): 藤本聡
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 東京
  • Year and Date: 2009-09-12
• [Presentation] Theory of Noncentrosymmetric Superconductors : Micoscopic Mechanism and Novel Electromagnetic Properties (2009)
  • Author(s): 藤本聡
  • Organizer: 9th International Conference on Materials and Mechanisms of Superconductivity
  • Place of Presentation: 東京
  • Year and Date: 2009-09-12
• [Presentation] Novel Phenomena in the mixed state of noncentrosymmetric superconductors (2009)
  • Author(s): 藤本聡
  • Organizer: New Developments in Theory of Superconductivity
  • Place of Presentation: 東京大学物性研究所
  • Year and Date: 2009-07-08
• [Presentation] 空間反転対称性のない超伝導体におけるトポロジカル秩序と非アーベル統計 (2008)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] 空間反転対称性のない超伝導体CeRhSi3, CeIrSi3における上部臨界磁場の解析II (2008)
  • Author(s): 多田靖啓, 川上則雄, 藤本聡
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] 空間反転対称性のない超伝導体におけるトポロジカル秩序と非ア-ベル統計 (2008)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] 空間反転対称性のない超伝導体CeRhSi3, CeIrSi3 における上部臨界磁場の解析II (2008)
  • Author(s): 多田靖啓, 川上則雄, 藤本聡
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] 空間反転対称性のない超伝導体CeRhSi3, GeIrSi3における上部臨界磁場の解析II (2008)
  • Author(s): 多田靖啓, 川上則雄, 藤本聡
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学
  • Year and Date: 2008-09-22
• [Presentation] Fractional flux quanta at intrinsic metallic interfaces of noncentrosymmetric superconductors (2008)
  • Author(s): 藤本聡、C. Iniotakis, M. Sigrist
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学
  • Year and Date: 2008-03-25
• [Presentation] 空間反転対称性のない重い電子系超伝導体CeRh(Ir)Si3における上部臨界磁場の解析 (2008)
  • Author(s): 多田靖啓, 川上則雄, 藤本聡
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学
  • Year and Date: 2008-03-25
• [Presentation] 空間反転対称性のない重い電子系超伝導体CeRh(Ir)Si3 における上部臨界磁場の解析 (2008)
  • Author(s): 多田靖啓, 川上則雄, 藤本聡
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学
  • Year and Date: 2008-03-25
• [Presentation] Fractional flux quanta at intrinsic metallic interfaces of noncentrosymmetric superconductors (2008)
  • Author(s): 藤本 聡
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学(大阪)
  • Year and Date: 2008-03-25
• [Presentation] 空間反転対称性のない超伝導体CeRhSi3についてのHubbardモデルによる解析II (2007)
  • Author(s): 多田靖啓, 藤本聡, 川上則雄
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-23
• [Presentation] Sr2RuO4の(001)界面における超伝導発現に関する微視的研究 (2007)
  • Author(s): 多田靖啓, 藤本聡, 川上則雄
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-21
• [Presentation] 空間反転対称性のない超伝導体CeRhSi3についてのHubbardモデルによる解析 (2007)
  • Author(s): 多田靖啓, 藤本聡, 川上則雄
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2007-03-21
• [Presentation] 空間反転対称性の無い超伝導体における磁場誘起ギャップレス相の準古典近似解析とY2 C3への応用 (2007)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2007-03-21
• [Presentation] 空間反転対称性の無い超伝導体における電子相関効果:磁性と輸送現象 (2006)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会2006年秋季大会
  • Place of Presentation: 千葉大学
  • Year and Date: 2006-09-25
• [Presentation] 空間反転対称性の破れた超伝導の新奇な物性 (2006)
  • Author(s): 藤本聡
  • Organizer: 日本物理学会2006年秋季大会
  • Place of Presentation: 千葉大学
  • Year and Date: 2006-09-24