Year: 2024
Type: article
Abstract: We study the phase diagram of spin-triplet superconductors, considering the effect of the external magnetic field on the electrons' spins. For a given symmetry of the order parameter and a generic orientation of the field, the paramagnetic limit for superconductivity diverges at low temperatures. For specific directions of the field, we identify a range of temperatures where the transition between normal and superconducting phases becomes of the first order. When two tricritical points exist along the transition line, a first-order phase transition between two superconducting phases may develop in vicinity of the tricritical point with lower temperature. We discuss the implications of our findings for the anisotropy of the upper critical field in ${\mathrm{UPt}}_{3}$, a candidate material for triplet superconductivity, when both the paramagnetic and orbital effects are taken into account.
Authors: Thomas Bernat, Julia S. Meyer, Manuel Houzet
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Agence Nationale de la Recherche
OpenAlex ID: W4405736654