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Open access
Date
2021-08Type
- Journal Article
Abstract
Inversion symmetry is a key symmetry in unconventional superconductors, and even its local breaking can have profound implications. For inversion-symmetric systems, there is a competition on a microscopic level between the spin-orbit coupling associated with the local lack of inversion and hybridizing terms that "restore" inversion. Investigating a layered system with alternating mirror-symmetry breaking, we study this competition considering the spin response of different superconducting order parameters for the case of strong spin-orbit coupling. We find that signatures of the local noncentrosymmetry, such as an increased spin susceptibility in spin-singlet superconductors for T -> 0, persist even into the quasi-three-dimensional regime. This leads to a direction-dependent spin response that allows us to distinguish different superconducting order parameters. Furthermore, we identify several regimes with possible topological superconducting phases within a symmetryindicator analysis. Our results may have direct relevance for the recently reported Ce-based superconductor CeRh2As2 and beyond. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000501643Publication status
publishedExternal links
Journal / series
Physical Review ResearchVolume
Pages / Article No.
Publisher
American Physical SocietyOrganisational unit
03571 - Sigrist, Manfred / Sigrist, Manfred
Funding
184739 - Supraleitung und Magnetismus in starkkorrelierten Elektronensystemen (SNF)
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