Vortex supercurrent inversion by frequency-symmetry conversion of Cooper pairs

Soma Yoshida; Shu-Ichiro Suzuki; Yukio Tanaka

doi:10.1103/PhysRevResearch.4.043122

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Vortex supercurrent inversion by frequency-symmetry conversion of Cooper pairs

Soma Yoshida, Shu-Ichiro Suzuki, Yukio Tanaka

DOI 10.1103/PhysRevResearch.4.043122 · Physical Review Research

T1

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Abstract

We theoretically demonstrate that the vortex supercurrent can be reversed by the frequency-symmetry conversion among Cooper pairs 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 pz-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 pz-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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown