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arXiv · 2201.06583

Piezo-superconductivity: new effects in non-centrosymmetric superconductors

Anton Kapustin·Leo Radzihovsky
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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.

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Anton Kapustin, Leo Radzihovsky. 2022-01-17. Piezo-superconductivity: new effects in non-centrosymmetric superconductors. https://doi.org/10.1103/physrevb.105.134514

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