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Piezoelectric effect and diode effect in anapole and monopole superconductors

Michiya ChazonoShota KanasugiTaisei KitamuraYouichi Yanase
Dec 2022
摘要
Superconductors lacking both inversion symmetry and time-reversal symmetryhave been attracting much attention as a platform for exotic superconductingphases and anomalous phenomena, including the superconducting diode effect.Recent studies revealed intrinsic phases with this symmetry, named anapolesuperconductivity and monopole superconductivity, which are $PT$-symmetricsuperconducting states with and without Cooper pairs' total momentum,respectively. To explore characteristic phenomena in these states, we calculateand predict the superconducting piezoelectric effect and superconducting diodeeffect. A close relationship with the finite-$q$ pairing, asymmetric Bogoliubovspectrum, and quantum geometry is discussed. This study reveals thepiezoelectric and diode effects as potential probes to elucidate exoticsuperconducting phases.
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