Generation of odd-frequency surface superconductivity with spontaneous spin current due to the zero-energy Andreev bound state

被引：8

作者：

Matsubara, Shun ^{[1
]}

Tanaka, Yukio ^{[2
]}

Kontani, Hiroshi ^{[1
]}

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 24期

关键词：

SYMMETRY ORDER PARAMETERS; TUNNELING SPECTROSCOPY; WAVE; IMPURITY; TRIPLET; MODEL; ZN; REALIZATION; COEXISTENCE; SUPERFLUID;

D O I：

10.1103/PhysRevB.103.245138

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose that the odd-frequency s wave (s(odd) wave) superconducting gap function, which is usually unstable in the bulk, naturally emerges at the edge of d wave superconductors. This prediction is based on the surface spin fluctuation pairing mechanism owing to the zero-energy surface Andreev bound state. The interference between bulk and edge gap functions triggers the d + s(odd) state, and the generated spin current is a useful signal uncovering the "hidden" odd-frequency gap. In addition, the edge s(odd) gap can be determined via the proximity effect on the diffusive normal metal. Furthermore, this study provides a decisive validation of the "Hermite odd-frequency gap function," which has been an open fundamental challenge to this field.

引用

页数：9

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