Abstract
Recently, evidence has emerged for a field-induced even- to odd-parity superconducting phase transition in [S. Khim et al., Science 373, 1012 (2021)]. Here we argue that the nonsymmorphic crystal structure of plays a key role in enabling this transition by ensuring large spin-orbit interactions near the Brillouin zone boundaries, which naturally leads to the required near-degeneracy of the even- and odd-parity channels. We further comment on the relevance of our theory to FeSe, which crystallizes in the same structure.
- Received 28 June 2021
- Revised 18 November 2021
- Accepted 3 January 2022
DOI:https://doi.org/10.1103/PhysRevB.105.L020505
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