Phase diagram of geometric d-wave superconductor Josephson junctions

被引：11

作者：

Gumann, A. ^{[1
]}

Schopohl, N.

机构：

[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 14期

关键词：

d-wave superconductivity; free energy; Josephson effect; phase diagrams; superconducting thin films; ANDREEV BOUND-STATES; UNCONVENTIONAL SUPERCONDUCTORS;

D O I：

10.1103/PhysRevB.79.144505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that a constriction-type Josephson junction realized by an epitactic thin film of a d-wave superconductor with an appropriate boundary geometry exhibits intrinsic phase differences between 0 and pi depending on geometric parameters and temperature. Based on microscopic Eilenberger theory, we provide a general derivation of the relation between the change in the free energy of the junction and the current-phase relation. From the change in the free energy, we calculate phase diagrams and discuss transitions driven by geometric parameters and temperature.

引用

页数：9

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