Kramers' degenerate magnetism and superconductivity

Adil Amin; Hao Wu; Tatsuya Shishidou; Daniel F. Agterberg

doi:10.1103/PhysRevB.109.024502

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Kramers' degenerate magnetism and superconductivity

Adil Amin, Hao Wu, Tatsuya Shishidou, Daniel F. Agterberg

DOI 10.1103/PhysRevB.109.024502 · Physical Review B

T1

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Abstract

Motivated by the recent discovery of odd-parity multipolar antiferromagnetic order in CeRh2As2, we examine the coexistence of such translation invariant Kramers' degenerate magnetic states and superconductivity. We show that the presence of such magnetic states generically suppresses superconductivity, whether it be spin-singlet or spin-triplet, unless the magnetic state drives a symmetry-required pair density wave superconducting order. We apply our results to CeRh2As2, where no pair density wave order appears, and to the loop current order in the cuprates, where such pair density wave superconductivity must appear together with Bogoliubov Fermi surfaces. In the former case, we explain why superconductivity is not suppressed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeRh2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
FeSe1-xSx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown