Piezo-superconductivity: new effects in non-centrosymmetric superconductors
Superconductivity
2022-10-12 v2
Abstract
We study novel effects in non-centrosymmetric superconductors arising from their unique coupling of Cooper-pair condensate and elasticity. We show that although the much discussed Lifshitz coupling is not observable in a uniform bulk state, it strikingly endows dislocations with a fractional magnetic flux. We also predict a generation of voltage-free strain by a DC current in a P and T-breaking Josephson junction. Viewing superconductors through the lens of higher-form symmetries we identify the Lifshitz coupling as a chemical potential for the approximately conserved winding number, drawing an analogy with pyroelectric insulators.
Keywords
Cite
@article{arxiv.2201.06583,
title = {Piezo-superconductivity: new effects in non-centrosymmetric superconductors},
author = {Anton Kapustin and Leo Radzihovsky},
journal= {arXiv preprint arXiv:2201.06583},
year = {2022}
}
Comments
10 pages; a clarification on effects in a vortex lattice