The current phase relation in Josephson tunnel junctions

被引：17
|
作者：
Golubov, AA [1 ]
Kupriyanov, MY
机构：
[1] Univ Twente, Fac Sci & Technol, Enschede, Netherlands
[2] Moscow MV Lomonosov State Univ, Inst Phys Nucl, Moscow 119992, Russia
来源：
JETP LETTERS | 2005年 / 81卷 / 07期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/1.1944074
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The J(Phi) relation in SFIFS, SNINS, and SIS tunnel junctions is studied. A method for the analytical solution of linearized Usadel equations has been developed and applied to these structures. It is shown that the Josephson current across the structure has a sum of sin Phi and sin 2 Phi components. Two different physical mechanisms are responsible for the sign of sin 2 Phi. The first one is the depairing by current, which contributes positively to the sin 2 Phi term, while the second one is the finite transparency of SF or SN interfaces, which provides the negative contribution. In SFIFS junctions, where the first harmonic vanishes at the 0-pi transition, the calculated second harmonic fully determines the J(Phi) curve. (C) 2005 Pleiades Publishing, Inc.
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页码：335 / 341
页数：7
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