Recently, evidence has emerged for a field-induced even- to odd-parity superconducting phase transition in CeRh₂As₂ [S. Khim et al., Science 373, 1012 (2021)]. Here we argue that the P4/nmm nonsymmorphic crystal structure of CeRh₂As₂ 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.
- 9926514948301891
- Nonsymmorphic symmetry and field-driven odd-parity pairing in CeRh₂As₂
- D. C. CavanaghT. ShishidouM. WeinertP. M. R. BrydonDaniel F. Agterberg
- Physical review. B, Vol.105(2), 020505
- Physics
- American Physical Society
- Royal Society Te Apārangi (New Zealand, Wellington)
- DE-SC0017632; DE-SC0021971 / U.S. Department of Energy
- 24/01/2022
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- English
- Journal article