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Odd-Parity Spin-Triplet Superconductivity in Centrosymmetric Antiferromagnetic Metals

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Title
Odd-Parity Spin-Triplet Superconductivity in Centrosymmetric Antiferromagnetic Metals
Author(s)
Seung Hun Lee; Hong Chul Choi; Bohm-Jung Yang
Publication Date
2021-02
Journal
PHYSICAL REVIEW LETTERS, v.126, no.6, pp.1 - 6
Publisher
AMER PHYSICAL SOC
Abstract
We propose a route to achieve odd-parity spin-triplet (OPST) superconductivity in metallic collinear antiferromagnets with inversion symmetry. Owing to the existence of hidden antiunitary symmetry, which we call the effective time-reversal symmetry (eTRS), the Fermi surfaces of ordinary antiferromagnetic metals are generally spin degenerate, and spin-singlet pairing is favored. However, by introducing a local inversion symmetry breaking perturbation that also breaks the eTRS, we can lift the degeneracy to obtain spin-polarized Fermi surfaces. In the weak-coupling limit, the spin-polarized Fermi surfaces constrain the electrons to form spin-triplet Cooper pairs with odd parity. Interestingly, all the odd-parity superconducting ground states we obtained host nontrivial band topologies manifested as chiral topological superconductors, second-order topological superconductors, and nodal superconductors. We propose that double perovskite oxides with collinear antiferromagnetic or ferrimagnetic ordering, such as SrLaVMoO6, are promising candidate systems where our theoretical ideas can be applied to.
URI
https://pr.ibs.re.kr/handle/8788114/9251
DOI
10.1103/PhysRevLett.126.067001
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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