Repository logo
 

Long-lived nonequilibrium superconductivity in a noncentrosymmetric Rashba semiconductor

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Verpoort, PC 
Dann, JRA 
Backes, D 
Ford, CJB 

Abstract

We report non-equilibrium magnetodynamics in the Rashba-superconductor GeTe, which lacks inversion symmetry in the bulk. We find that at low temperature the system exhibits a non-equilibrium state, which decays on time scales that exceed conventional electronic scattering times by many orders of magnitude. This reveals a non-equilibrium magnetoresponse that is asymmetric under magnetic field reversal and, strikingly, induces a non-equilibrium superconducting state distinct from the equilibrium one. We develop a model of a Rashba system where non-equilibrium configurations relax on a finite timescale which captures the qualitative features of the data. We also obtain evidence for the slow dynamics in another non-superconducting Rashba system. Our work provides novel insights into the dynamics of non-centrosymmetric superconductors and Rashba systems in general.

Description

Keywords

cond-mat.supr-con, cond-mat.supr-con

Journal Title

Physical Review B

Conference Name

Journal ISSN

2469-9950
2469-9969

Volume Title

100

Publisher

American Physical Society (APS)
Sponsorship
The Royal Society (uf130122)
EPSRC (1641845)
EPSRC (2138907)
EPSRC, Royal Society, DFG
Relationships
Is supplemented by: