The current phase relation in Josephson tunnel junctions

被引：0
|
作者：
A. A. Golubov
M. Yu. Kupriyanov
机构：
[1] University of Twente,Faculty of Science and Technology
[2] Moscow State University,Nuclear Physics Institute
来源：
Journal of Experimental and Theoretical Physics Letters | 2005年 / 81卷
关键词：
74.50.+r; 74.80.Dm; 75.30.Et;
D O I：
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中图分类号：
学科分类号：
摘要：
The J(ϕ) 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 sinϕ and sin2ϕ components. Two different physical mechanisms are responsible for the sign of sin2ϕ. The first one is the depairing by current, which contributes positively to the sin2ϕ 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-π transition, the calculated second harmonic fully determines the J(ϕ) curve.
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页码：335 / 341
页数：6
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