Superconducting piezoelectric effect

Article

关键词: SYMMETRY-BREAKING;   

DOI  :  10.1103/PhysRevB.105.024509

来源: SCIE

【 摘 要 】

The magnetopiezoelectric effect (MPE) is a cross coupling between an electric current and strain in metals with neither inversion symmetry nor time-reversal symmetry. Unlike the conventional piezoelectric effect, the electric current allows a MPE-like response in superconductors, which we call the superconducting piezoelectric effect (SCPE). The SCPE may enable a piezoelectric response without Joule heating and may provide a probe of exotic superconducting symmetry. In this paper, we propose a formulation of the SCPE and calculate both the MPE and SCPE in a two-dimensional noncentrosymmetric s-wave superconductor under an in-plane magnetic field. We find that the magnitude of the SCPE is comparable to the MPE. We also clarify that the finite total momentum of Cooper pairs in the helical superconducting state plays a crucial role in the SCPE.

【 授权许可】

Free