Superconducting piezoelectric effect
Superconducting piezoelectric effect
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DOI：
10.1103/physrevb.105.024509
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发表时间：
2021-09
影响因子：
3.7
通讯作者：
Michiya Chazono;Hikaru Watanabe;Y. Yanase
中科院分区：
文献类型：
--
作者：
Michiya Chazono;Hikaru Watanabe;Y. Yanase
磁压电效应（MPE）是电流和应变之间的交叉耦合，既不具有反转对称性，也不具有时间反演对称性。与传统的压电效应不同，MPE允许超导体中的压电响应，我们称之为超导压电效应（SCPE）。SCPE可以在没有焦耳加热的情况下实现压电响应，并提供奇异超导对称性的探针。在本文中，我们提出了一个公式的SCPE和计算的MPE和SCPE在二维非中心对称的s波超导体在一个面内磁场。我们发现，SCPE的大小是可比的MPE。同时也阐明了螺旋超导态中库珀对的有限总动量在SCPE中起着至关重要的作用。
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 MPE allows a piezoelectric response in superconductors, as we call the superconducting piezoelectric effect (SCPE). The SCPE may enable a piezoelectric response without Joule heating and 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 the 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. It is also clarified that finite total momentum of Cooper pairs in the helical superconducting state plays a crucial role in the SCPE.