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We analyze the real-space paired state with the $\mathbf{k}$-dependent superconducting gap in the presence of Rashba type spin-orbit coupling and external magnetic field. We show that the $extended$ $s$-$wave$ pairing symmetry is the most…

超导电性 · 物理学 2022-11-30 M. Zegrodnik , P. Wójcik

We develop a theory for interacting fermions in the presence of spin-orbit coupling and Zeeman fields, and show that many new superfluids phases, which are topological in nature, emerge. Depending on values of spin-orbit coupling, Zeeman…

量子气体 · 物理学 2011-10-31 Kangjun Seo , Li Han , C. A. R. Sá de Melo

We examine the depairing field $H_{c2}(T)$ of non-centrosymmetric superconductors with a spin-orbit coupling larger than the Zeeman energy at $H_{c2}(0)$ by taking account of the mixing of spin-singlet and triplet pairing states due to the…

超导电性 · 物理学 2009-11-13 Norihito Hiasa , Ryusuke Ikeda

Stimulated by recent interest in altermagnets, a novel class of antiferromagnets with macroscopic time-reversal symmetry breaking, we investigate the coexistence of altermagnetism and superconductivity. By developing a Ginzburg--Landau…

超导电性 · 物理学 2025-10-28 Shuntaro Sumita , Makoto Naka , Hitoshi Seo

The odd-parity spin-triplet Cooper pairing states show a six-fold degeneracy for a quasi-two-dimensional electron system. In this article we show how spin-orbit coupling can lift this degeneracy for Sr_2RuO_4 taking the band structure based…

超导电性 · 物理学 2009-10-31 Kwai-Kong Ng , Manfred Sigrist

The Stoner instability remains a cornerstone for understanding metallic ferromagnets. This instability captures the interplay of Coulomb repulsion, Pauli exclusion, and two-fold fermionic spin degeneracy. In materials with spin-orbit…

强关联电子 · 物理学 2024-11-13 Yue Yu , Tatsuya Shishidou , Shuntaro Sumita , Michael Weinert , Daniel F. Agterberg

Interband pairing in multiband superconductors is often neglected because of its higher energetic cost compared with intraband pairing. We show that, in multiband systems, a Zeeman magnetic field can stabilize interband pairing through the…

超导电性 · 物理学 2026-03-10 Shohei O. Shingu , Jun Goryo

We analyze the effect of magnetic fluctuations in superconductors with strong spin-orbit coupling and show that they drive a phase transition between two superconducting states: a conventional phase with zero center-of-mass momentum of…

超导电性 · 物理学 2017-05-31 Aviram Steinbok , Karen Michaeli

Recent in-plane thermal (Nernst) and interlayer (tunnelling) transport experiments in Bi$_2$Sr$_2$CaCu$_2$O$_{8+y}$ high temperature superconductors report hugely different limiting magnetic fields. Based on pairing (and the uncertainty…

超导电性 · 物理学 2009-11-10 L. Krusin-Elbaum , G. Blatter , T. Shibauchi

Magnetic atoms coupled to the Cooper pairs of a superconductor induce Yu-Shiba-Rusinov states (in short Shiba states). In the presence of sufficiently strong spin-orbit coupling, the bands formed by hybridization of the Shiba states in…

Recently proposed local-correlation-driven pairing mechanism, describing ferromagnetic phases (FM1 and FM2) coexisting with spin-triplet superconductivity (SC) within a single orbitally degenerate Anderson lattice model, is extended to the…

强关联电子 · 物理学 2019-05-15 M. Fidrysiak , D. Goc-Jagło , E. Kądzielawa-Major , P. Kubiczek , J. Spałek

We present a first-principle study of spin-orbit coupling effects on the Fermi surface of Sr2RuO4 and Sr2RhO4. For nearly degenerate bands, spin-orbit coupling leads to a dramatic change of the Fermi surface with respect to non-relativistic…

强关联电子 · 物理学 2009-11-13 M. W. Haverkort , I. S. Elfimov , L. H. Tjeng , G. A. Sawatzky , A. Damascelli

The effect of spin-orbit coupling on the electronic structure of the layered iron-free pnictide superconductor, SrPtAs, has been studied using the full potential linearized augmented plane wave method. The anisotropy in Fermi velocity,…

超导电性 · 物理学 2012-02-09 S. J. Youn , S. H. Rhim , D. F. Agterberg , M. Weinert , A. J. Freeman

The effects of absence of inversion symmetry on superconducting states are investigated theoretically. In particular we focus on the noncentrosymmetric compounds which have the cubic symmetry $O$ like Li$_2$Pt$_3$B. An appropriate and…

超导电性 · 物理学 2008-03-04 Chi-Ken Lu , Sungkit Yip

Centrosymmetric antiferromagnetic semiconductors, although abundant in nature, appear less favorable in spintronics owing to the lack of inherent spin polarization and magnetization. We unveil hidden Zeeman-type spin splitting (HZSS) in…

材料科学 · 物理学 2023-08-17 Sajjan Sheoran , Saswata Bhattacharya

Transition metal compounds with the $(t_{2g})^4$ electronic configuration are expected to be nonmagnetic atomic singlets both in the weakly interacting regime due to spin-orbit coupling, as well as in the Coulomb dominated regime with…

强关联电子 · 物理学 2017-01-16 Christopher Svoboda , Mohit Randeria , Nandini Trivedi

It has been more than 40 years since superconductivity was discovered in organic conductors, and the way scientists view organic superconductors has changed over time. At first, the fact that organic conductors exhibit superconductivity was…

超导电性 · 物理学 2023-07-20 Hiroshi Oike , Hiromi Taniguchi , Kazuya Miyagawa , Kazushi Kanoda

Motivated by recent experimental findings, we have developed a theory of the superconducting state for 2D metals without inversion symmetry modeling the geometry of a surface superconducting layer in a field-effect-transistor or near the…

超导电性 · 物理学 2009-11-07 Lev P. Gor'kov , Emmanuel I. Rashba

We study proximity-induced superconductivity on the surface of a topological insulator (TI), focusing on unconventional pairing. We find that the excitation spectrum becomes gapless for any spin-triplet pairing, such that both subgap bound…

超导电性 · 物理学 2015-05-14 Jacob Linder , Yukio Tanaka , Takehito Yokoyama , Asle Sudbø , Naoto Nagaosa

High-resolution angle-resolved photoelectron spectroscopy is used to examine the electronic band structure of FeTe$_{0.5}$Se$_{0.5}$ near the Brillouin zone center. A consistent separation of the $\alpha_{1}$ and $\alpha_{2}$ bands is…

强关联电子 · 物理学 2016-06-14 P. D. Johnson , H. -B. Yang , J. D. Rameau , G. D. Gu , Z. -H. Pan , T. Valla , M. Weinert , A. V. Fedorov