Anomalous Josephson effect in planar noncentrosymmetric superconducting devices
Abstract
In two-dimensional electron systems with broken inversion and time-reversal symmetries, a Josephson junction reveals an anomalous response: the supercurrent is nonzero even at zero phase difference between two superconductors. We consider details of this peculiar phenomenon in the planar double-barrier configurations of hybrid circuits, where the noncentrosymmetric normal region is described in terms of the paradigmatic Rashba model of spin-orbit coupling. We analyze this anomalous Josephson effect by means of both the Ginzburg-Landau formalism and the microscopic Green's functions approach in the clean limit. The magnitude of the critical current is calculated for an arbitrary in-plane magnetic field orientation, and anomalous phase shifts in the Josephson current-phase relation are determined in terms of the parameters of the model in several limiting cases.
Keywords
Cite
@article{arxiv.2210.01037,
title = {Anomalous Josephson effect in planar noncentrosymmetric superconducting devices},
author = {Jaglul Hasan and Konstantin N. Nesterov and Songci Li and Manuel Houzet and Julia S. Meyer and Alex Levchenko},
journal= {arXiv preprint arXiv:2210.01037},
year = {2022}
}
Comments
Spin-Coherent Phenomena in Semiconductors: Physical Review B special issue in honor of E. I. Rashba [10 pages, 5 figures]