Quantum kinetic equations and anomalous nonequilibrium Cooper-pair spin accumulation in Rashba wires with Zeeman splitting

摘要

We derive the theoretical and numerical framework for investigating nonequilibrium properties of spin-orbit coupled wires with Zeeman splitting proximized by a superconductor in the nonlinear diffusive regime. We demonstrate that the anisotropic behavior of triplet Cooper pairs in this system leads to novel spin accumulation profiles tunable by the magnetic field and strength of applied voltage bias. This paves the way for enhanced manipulation of superconducting spintronic devices, and it enables further investigation of nonequilibrium effects in proximity-coupled superconducting structures more generally.