Symmetry conditions for the superconducting diode effect in chiral superconductors
Open access
Date
2022Type
- Journal Article
Abstract
We analyze the presence of nonreciprocal 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 Sr2RuO4 as evidence for spontaneously broken time-reversal symmetry in the superconducting phase. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000575021Publication status
publishedExternal links
Journal / series
Physical Review ResearchVolume
Pages / Article No.
Publisher
American Physical SocietyOrganisational unit
03571 - Sigrist, Manfred / Sigrist, Manfred
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