Boundary effects in two-band superconductors

被引：15

作者：

Benfenati, Andrea ^{[1
]}

Samoilenka, Albert ^{[1
]}

Babaev, Egor ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Theoret Phys, SE-10691 Stockholm, Sweden

来源：

PHYSICAL REVIEW B | 2021年 / 103卷 / 14期

基金：

瑞典研究理事会;

关键词：

SURFACE SUPERCONDUCTIVITY; TRANSITION; HEAT;

D O I：

10.1103/PhysRevB.103.144512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a microscopic study of the behavior of the order parameters near the boundaries of a two-band superconducting material, described by the standard tight-binding Bardeen-Cooper-Schrieffer model. We find superconducting surface states. The relative difference between bulk and surface critical temperatures is a nontrivial function of the interband coupling strength. For superconductors with weak interband coupling, boundaries induce variations of the gaps with the presence of multiple length scales, despite nonzero interband Josephson coupling.

引用

页数：6

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