Phase diagram of strongly-coupled Rashba systems

Abstract

Motivated by the recent discovery of a possible field-mediated parity switch within the superconducting state of CeRh _2 As _2 (Khim et al 2021 Science 373 1012), we thoroughly investigate the dependence of the superconducting state of a strongly-coupled Rashba mono- and bilayer on internal parameters and an applied magnetic field. The role of interlayer pairing, spin orbit coupling, doping rate and applied magnetic field and their interplay was examined numerically at low temperature within a t-J- like model, uncovering complex phase diagrams and transitions between superconducting states with different symmetry.

Keywords

• Rashba
• parity switch
• phase diagram
• locally noncentrosymmetric
• strong coupling