论文标题

通过库珀对的频率对称转换,涡旋超电流反转

Vortex supercurrent inversion by frequency-symmetry conversion of Cooper pairs

论文作者

Yoshida, Soma, Suzuki, Shu-Ichiro, Tanaka, Yukio

论文摘要

从理论上讲,我们证明了涡流超电流可以通过奇数为库珀对逆转,并伴随着表面安德里弗·绑定的状态。考虑了通过通量量子刺穿的三维超导体的表面。我们使用准经典的Eilenberger理论比较了旋转singlet $ s $ - 波和旋转三个$ p_z $ - 波超导体的表面附近的涡旋超电流,其中表面垂直于$ z $方向。我们证明,与远离表面的那些相比,$ p_z $ - 波超导体表面附近的涡流超电流是反转的,而$ s $ - 波超导体则没有。证明了由表面安妮·雷夫(Andreev)结合状态和caroli-de Gennes-Matricon模式的干扰引起的零能状态的分裂。

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.

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