Vortex supercurrent inversion by frequency-symmetry conversion of Cooper pairs

• Main Authors: Yoshida, Soma, Suzuki, Shu-Ichiro, Tanaka, Yukio
• Format: Journal Article
• Language: English
• Published: 01-09-2022
• Subjects: Physics - Superconductivity
• DOI: 10.48550/arxiv.2209.00452

Phys. Rev. Research 4, 043122 (2022) We theoretically demonstrate that the vortex supercurrent can be reversed by
odd-frequency Cooper pairs accompanied by surface Andreev bound states. The
surface of a three-dimensional superconductor pierced by a flux quantum is
considered. We compare the vortex supercurrents near the surface of the
spin-singlet $s$-wave and spin-triplet $p_z$-wave superconductors using
quasiclassical Eilenberger theory, where the surface is perpendicular to the
$z$ direction. We demonstrate that the vortex supercurrent near the surface of
a $p_z$-wave superconductor is reversed compared to those far from the surface,
whereas that of an $s$-wave superconductor is not. The splitting of the
zero-energy states caused by the interference of the surface Andreev bound
states and Caroli-de Gennes-Matricon modes is demonstrated.