Theoretical study for quantitative estimate for properties of vortex states, and extension to multi-component superconductors

2010 Fiscal Year Final Research Report

• Project/Area Number: 19540369
• 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: Okayama University
• Principal Investigator: ICHIOKA Masanori 岡山大学, 大学院・自然科学研究科, 准教授 (90304295)
• Project Period (FY): 2007 – 2010
• Keywords: 非従来型超伝導 / 渦糸状態 / 中性子小角散乱 / パウリ常磁性 / 重い電子系超伝導

Research Abstract

Spatial structure of vortex states in unconventional superconductors was theoretically studied, in order to establish theoretical methods to quantitatively estimate the temperature and magnetic field dependence of physical quantities, such as specific heat, magnetization, small angle neutron scattering intensity, and NMR spectrum. Using these, we extract information about mechanisms of unconventional superconductivity. The numerical methods to calculate vortex states in multicomponent superconductors, including spin-triplet pairing, were also developed.

Research Products

• [Journal Article] Lower Critical Field Hc1(T) and Pairing Symmetry Based on Eilenberger Theory (2011)
  • Author(s): T. Akiyama, M. Ichioka, and K. Machida
  • Journal Title: J. Phys. Soc. Jpn. Volume: 80 Pages: 015001,1-2
  • Peer Reviewed
• [Journal Article] Skyrmion lattice and intrinsic angular momentum effect in the superfluid 3He A-phase under rotation (2010)
  • Author(s): M. Ichioka, T. Mizushima, and K. Machida
  • Journal Title: Phys. Rev. B Volume: 81 Pages: 094516,1-6
  • Peer Reviewed
• [Journal Article] Vortex State and Field-Angle Resolved Specific Heat Oscillation for H//ab in d-Wave Superconductors (2010)
  • Author(s): M. Hiragi, K. M. Suzuki, M. Ichioka, and K. Machida
  • Journal Title: J. Phys. Soc. Jpn. Volume: 79 Pages: 094709,1-9
  • Peer Reviewed
• [Journal Article] Theory of Pairing Symmetry in Fulde-Ferrell-Larkin-Ovchinnikov Vortex State and Vortex Lattice (2010)
  • Author(s): T. Yokoyama, M. Ichioka, and Y. Tanaka
  • Journal Title: J. Phys. Soc. Jpn. Volume: 79 Pages: 034702,1-10
  • Peer Reviewed
• [Journal Article] Generic First-Order Orientation Transition of Vortex Lattices in Type II Superconductors (2010)
  • Author(s): K. M. Suzuki, K. Inoue, P. Miranovi., M. Ichioka, and K. Machida
  • Journal Title: J. Phys. Soc. Jpn. Volume: 79 Pages: 013702,1-4
  • Peer Reviewed
• [Journal Article] Sign Reversal of Field-Angle Resolved Heat Capacity Oscillations in a Heavy Fermion Superconductor CeCoIn5 and dx2-y2 Pairing Symmetry (2010)
  • Author(s): K. An, T. Sakakibara, R. Settai, Y. Onuki, M. Hiragi, M. Ichioka, and K. Machida
  • Journal Title: Phys. Rev. Lett. Volume: 104 Pages: 037002,1-4
  • Peer Reviewed
• [Journal Article] Magnetic field dependence of low-temperature specific heat in Sr_2RuO_4 (2008)
  • Author(s): K. Machida and M. Ichioka
  • Journal Title: Phys. Rev. B Volume: 77 Pages: 184515,1-7
  • Peer Reviewed
• [Journal Article] Field-Angle-Dependent Specific Heat Measurements and Gap Determination of a Heavy Fermion Superconductor URu_2Si_2 (2008)
  • Author(s): K. Yano, T. Sakakibara, T. Tayama, M. Yokoyama, H. Amitsuka, Y. Homma, P. Miranovic, M. Ichioka, Y. Tsutsumi, and K. Machida
  • Journal Title: Phys. Rev. Lett. Volume: 100 Pages: 017004,1-4
  • Peer Reviewed
• [Journal Article] Magnetization profile and core-level spectroscopy in a multiply quantized vortex of imbalanced Fermi superfluids (2008)
  • Author(s): K. M. Suzuki, T. Mizushima, M. Ichioka, and K. Machida
  • Journal Title: Phys. Rev. A Volume: 77 Pages: 063617,1-11
  • Peer Reviewed
• [Journal Article] Role of the Majorana Fermion and the Edge Mode in Chiral Superfluidity near a p-Wave Feshbach Resonance (2008)
  • Author(s): T. Mizushima, M. Ichioka, and K. Machida
  • Journal Title: Phys. Rev. Lett. Volume: 101 Pages: 150409,1-4
  • Peer Reviewed
• [Journal Article] Majorana Bound State in Rotating Superfluid H^3e-A between Parallel Plates (2008)
  • Author(s): Y. Tsutsumi, T. Kawakami, T. Mizushima, M. Ichioka, and K. Machida
  • Journal Title: Phys. Rev. Lett. Volume: 101 Pages: 135302,1-4
  • Peer Reviewed
• [Journal Article] Pauli Paramagnetic Effects Vortices in Superconducting TmNi_2B_2C (2007)
  • Author(s): L. DeBeer-Schmitt, M. R. Eskildsen, M. Ichioka, K. Machida, N. Jenkins, C. D. Dewhurst, A. B. Abrahamsen, S. L. Bud' ko, and P. C. Canfield
  • Journal Title: Phys. On Rev. Lett. Volume: 99 Pages: 167001,1-4
  • Peer Reviewed
• [Journal Article] Vortex states in superconductors with strong Pauli-paramagnetic effect (2007)
  • Author(s): M. Ichioka and K. Machida
  • Journal Title: Phys. Rev. B Volume: 76 Pages: 064502,1-7
  • Peer Reviewed
• [Presentation] d波超伝導の渦糸状態における不純物効果の準古典理論評価 (2010)
  • Author(s): 市岡優典, 町田一成, J. A. Sauls
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学(堺)
  • Year and Date: 20100923-26
• [Presentation] d波超伝導体の面内磁場での磁束格子構造 (2009)
  • Author(s): 市岡優典, 鈴木健太, 町田一成
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学(東京)
  • Year and Date: 20090327-30
• [Presentation] 磁束状態の中性子散乱強度と常磁性効果 (2008)
  • Author(s): 市岡優典, 鈴木健太, 町田一成
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 岩手大学(盛岡)
  • Year and Date: 20080920-23
• [Presentation] Flux line lattice form factor and paramagnetic effects in type II superconductors (2008)
  • Author(s): M. Ichioka, K. Machida
  • Organizer: 25th International Conference on Low Temperature Physics(LT25)
  • Place of Presentation: アムステルダム(オランダ)
  • Year and Date: 20080806-13
• [Presentation] Mermin-Ho渦格子状態についての準古典理論計算 (2008)
  • Author(s): 市岡優典, 堤康雅, 水島健, 町田一成
  • Organizer: 日本物理学会第63回年次大会
  • Place of Presentation: 近畿大学(東大阪)
  • Year and Date: 20080323-16
• [Presentation] テクスチャー構造の秩序変数の超伝導状態(理論) (2007)
  • Author(s): 市岡優典
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学(札幌)
  • Year and Date: 20070921-24
• [Presentation] カイラルp波超伝導でのリトル・パークス振動 (2007)
  • Author(s): 市岡優典, 町田一成, 石綿元, 瀧川光明, 浅野泰寛
  • Organizer: 日本物理学会第62回年次大会
  • Place of Presentation: 北海道大学(札幌)
  • Year and Date: 20070921-24
• [Remarks] 報道関連「第2種超伝導体における渦糸格子のモルフォロジー」科学新聞2010年1月22日掲載.
• [Remarks] アウトリーチ活動日本科学技術振興財団サイエンスキャンプ「量子世界の探検～超伝導を体験しよう～」(岡山大学自然科学研究科)にて、高校生を対象に超伝導の理論に関する講義を担当) 2010年度(8月18日), 2009年度(8月18日), 2008年度(8月20日)の3回実施
• [Remarks]
  • URL: http://mp.okayama-u.ac.jp/~oka/