Symmetry conditions for the superconducting diode effect in chiral superconductors
Superconductivity
2022-12-13 v1
Abstract
We analyze the presence of non-reciprocal critical currents, the so-called superconducting diode effect, in chiral superconductors within a generalized Ginzburg-Landau framework. After deriving its key symmetry conditions we illustrate the basic mechanism for two examples, the critical current in a thin film and a Josephson junction. The appearance of spontaneous edge currents and the energy bias for the formation of Josephson vortices play an essential part in establishing a splitting of the critical currents running in opposite directions. Eventually, this allows us to interpret a superconducting diode effect observed in the 3-Kelvin phase of SrRuO as evidence for spontaneously broken time-reversal symmetry in the superconducting phase.
Keywords
Cite
@article{arxiv.2111.05340,
title = {Symmetry conditions for the superconducting diode effect in chiral superconductors},
author = {Bastian Zinkl and Keita Hamamoto and Manfred Sigrist},
journal= {arXiv preprint arXiv:2111.05340},
year = {2022}
}