π-0 transition in superconductor-ferromagnet-superconductor junctions

被引：74

作者：

Chtchelkatchev, NM

Belzig, W

Nazarov, YV

Bruder, C

机构：

[1] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117940, Russia

[2] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland

[3] Delft Univ Technol, Dept Appl Phys, NL-2628 CJ Delft, Netherlands

[4] Delft Univ Technol, Delft Inst Microelect & Submicrontechnol, NL-2628 CJ Delft, Netherlands

来源：

JETP LETTERS | 2001年 / 74卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/1.1421408

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Superconductor-ferromagnet-superconductor (SFS) Josephson junctions are known to exhibit a transition between pi and 0 states. In this letter, we find the pi -0 phase diagram of an SFS junction depending on the transparency of an intermediate insulating layer (I). We show that, in general, the Josephson critical current is nonzero at the pi -0 transition temperature. Contributions to the current from the two spin channels nearly compensate each other, and the first harmonic of the Josephson current as a function of phase difference is suppressed. However, higher harmonics give a nonzero contribution to the supercurrent. (C) 2001 MAIK "Nauka / Interperiodica".

引用

页码：323 / 327

页数：5

共 17 条

[1] PI PHASE IN MAGNETIC-LAYERED SUPERCONDUCTORS [J].