Theoretical study on f-electron superlattice

• Project/Area Number: 26800177
• 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: Tada Yasuhiro 東京大学, 物性研究所, 助教 (20609937)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: 超格子 / ｆ電子 / 電子相関 / 超伝導 / 磁性 / 近藤効果 / 強磁性 / 重い電子 / 量子臨界点 / カイラル超伝導 / 強磁性超伝導 / 電磁場揺らぎ / ｆ電子系 / RKKY相互作用 / 表面流 / トポロジカル / スピン軌道相互作用 / 強相関

Outline of Final Research Achievements

In this project, we have studied correlation effects in f-electron superlattices. We have investigated (1) Kondo effect and electrical resistivity, (2) antiferromagnetism and superconductivity, and (3) ferromagnetism. (1) Impacts of superlattice structures on Kondo effect have been examined. Resistivity of the heavy fermions formed in the superlattice was also studied. (2) We have discussed the competition between antiferromagnetic RKKY interaction and Kondo effect. Superconductivity mediated by itinerant spin fluctuations was also discussed. (3) We have studied a possible ferromagnetic quantum critical point and magnetoresistance in Kondo superlattices.

Research Products

• [Int'l Joint Research] The Technical University of Munich(Germany)
• [Journal Article] Fulde-Ferrell state in a ferromagnetic chiral superconductor with magnetic domain walls (2018)
  • Author(s): Yasuhiro Tada
  • Journal Title: Physical Revew B Volume: 97 Issue: 1 Pages: 14519-14519
  • DOI: 10.1103/physrevb.97.014519
  • Peer Reviewed
• [Journal Article] Decay of superconducting correlations for gauged electrons in dimensions D >= 4 (2018)
  • Author(s): Yasuhiro Tada and Toru Koma
  • Journal Title: Journal of Mathematical Physics Volume: 59 Issue: 3 Pages: 31905-31905
  • DOI: 10.1063/1.5029282
  • Peer Reviewed
• [Journal Article] Magnetism in f-electron superlattices (2016)
  • Author(s): Robert Peters, Yasuhiro Tada, and Norio Kawakami
  • Journal Title: Phy. Rev. B Volume: 94 Issue: 20 Pages: 205142-205142
  • DOI: 10.1103/physrevb.94.205142
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Two No-Go Theorems on Superconductivity (2016)
  • Author(s): Yasuhiro Tada, Tohru Koma
  • Journal Title: Journal of Statistical Physics Volume: 165 Issue: 3 Pages: 455-455
  • DOI: 10.1007/s10955-016-1629-2
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Magnetism and superconductivity in ferromagnetic heavy-fermion system UCoGe under in-plane magnetic fields (2016)
  • Author(s): Y. Tada, S. Takayoshi, and S. Fujimoto
  • Journal Title: Physical Review B Volume: 93 Issue: 17 Pages: 174512-174512
  • DOI: 10.1103/physrevb.93.174512
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Equilibrium surface current and role of U(1) symmetry: Sum rule and surface perturbations (2015)
  • Author(s): Yasuhiro Tada
  • Journal Title: Ｐｈｙｓｉｃａｌ Ｒｅｖｉｅｗ Ｂ Volume: 92 Issue: 10 Pages: 104502-104502
  • DOI: 10.1103/physrevb.92.104502
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin fluctuations and superconductivity in layered f-electron superlattices (2015)
  • Author(s): Yasuhiro Tada and Robert Peters
  • Journal Title: Physical Review B Volume: 92 Issue: 3 Pages: 035129-035129
  • DOI: 10.1103/physrevb.92.035129
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Orbital Angular Momentum and Spectral Flow in Two-Dimensional Chiral Superfluids (2015)
  • Author(s): Yasuhiro Tada, Wenxing Nie, and Masaki Oshikawa
  • Journal Title: Physical Review Letters Volume: 114 Issue: 19 Pages: 195301-195301
  • DOI: 10.1103/physrevlett.114.195301
  • Peer Reviewed
• [Journal Article] ウラン系強磁性超伝導における強磁性ゆらぎが誘起するスピン三重項超伝導 (2015)
  • Author(s): 石田 憲二, 服部 泰佑, 佐藤 憲昭, 出口 和彦, 多田 靖啓, 藤本 聡
  • Journal Title: 固体物理 Volume: 50 Pages: 123-132
  • Peer Reviewed
• [Journal Article] Orbital Angular Momentum and Spectral Flow in Two Dimensional Chiral Super uids (2015)
  • Author(s): Yasuhiro Tada, Wenxing Nie, and Masaki Oshikawa
  • Journal Title: Physical Review Letters Volume: 印刷中
  • Peer Reviewed
• [Presentation] 超伝導における不可避定理：永久電流とU(1)対称性の破れ (2017)
  • Author(s): 多田靖啓、高麗徹
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府、豊中市）
  • Year and Date: 2017-03-17
• [Presentation] 超流動体における軌道角運動量について (2017)
  • Author(s): 多田靖啓
  • Organizer: 第七回 強相関電子系理論の最前線
• [Presentation] カイラル超流動体におけるエッジ流と軌道角運動量 (2017)
  • Author(s): 多田靖啓、Frank Pollmann
  • Organizer: 日本物理学会 秋季大会
• [Presentation] ゲージ場と結合する超伝導体におけるクーパー対相関の減衰 (2017)
  • Author(s): 多田靖啓、高麗徹
  • Organizer: 日本物理学会 秋季大会
• [Presentation] カイラル反強磁性体Mn3Snにおける表面状態の観測 (2017)
  • Author(s): 向笠清隆, 下澤雅明, 鈴木喜貴, 杉井かおり, 近藤潤, 山下穣, 多田靖啓, 中村壮智, 勝本信吾, Muhammad Ikhlas, 冨田崇弘, 肥後友也, 中辻知, Marcin Konczykowski, 松田祐司, 松浦康平, 水上雄太, 芝内孝禎
  • Organizer: 日本物理学会 秋季大会
• [Presentation] 平衡表面流におけるU(1)対称性の役割 (2015)
  • Author(s): 多田靖啓
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学（大阪府吹田市）
  • Year and Date: 2015-09-16
• [Presentation] Anisotropic Upper Critical Fields in Heavy Fermion Superconductors (2014)
  • Author(s): Yasuhiro Tada
  • Organizer: REIMEI-ICC-IMR Workshop
  • Place of Presentation: 東北大学金属材料研究所（宮城県・仙台市）
  • Year and Date: 2014-12-04 – 2014-12-05
  • Invited
• [Presentation] 横磁場中における重い電子系超伝導体UCoGe (2014)
  • Author(s): 多田靖啓
  • Organizer: 日本物理学会2014年秋季大会
  • Place of Presentation: 中部大学（愛知県・春日井市）
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] Theoretical Study of Upper Critical Field and Mechanism of Superconductivity in UCoGe (2014)
  • Author(s): Yasuhiro Tada
  • Organizer: International Conference on Strongly Correlated Electron Systems 2014
  • Place of Presentation: Grenoble (France)
  • Year and Date: 2014-07-07 – 2014-07-11
• [Book] 固体物理 (2015)
  • Author(s): 石田 憲二, 服部 泰佑, 佐藤 憲昭, 出口 和彦, 多田 靖啓, 藤本 聡
  • Total Pages: 10
  • Publisher: アグネ技術センター