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Published February 28, 2022 | Submitted
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Piezo-superconductivity: new effects in non-centrosymmetric superconductors

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.

Additional Information

Attribution 4.0 International (CC BY 4.0). We acknowledge financial support through the Simons Investigator Awards by the James Simons Foundation. A. K. was also supported in part by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award Number DE-SC0011632. L.R. thanks D. Agterberg and L. Fu for discussions.

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Created:
September 15, 2023
Modified:
October 23, 2023