Topological metals and finite-momentum superconductors.

Yuan, Noah F Q; Fu, Liang · Proc Natl Acad Sci U S A · 2021

basic_science · Level V

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Abstract

We show that the Zeeman field can induce a topological transition in two-dimensional spin-orbit-coupled metals and, concomitantly, a first-order phase transition in the superconducting state involving a discontinuous change of Cooper pair momentum. Depending on the spin-orbit coupling strength, we find different phase diagrams of two-dimensional (2D) superconductors under in-plane magnetic field.