Mesoscopic effects in superconductor-ferromagnet-superconductor junctions

被引：19
|
作者：
Zyuzin, AY
Spivak, B
Hruska, M
机构：
[1] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[2] Univ Washington, Dept Phys, Seattle, WA 98195 USA
来源：
EUROPHYSICS LETTERS | 2003年 / 62卷 / 01期
关键词：
D O I：
10.1209/epl/i2003-00367-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show that at zero temperature the supercurrent through the superconductor ferromagnetic-metal-superconductor (SFS) junctions does not decay exponentially with the thickness L of the junction. At large L it has a random sample-specific sign which can change with a change in temperature. In the case of mesoscopic junctions the phase of the order parameter in the ground state is a random sample-specific quantity. In the case of junctions of large area the ground-state phase difference is +/- pi/2.
引用
收藏
页码：97 / 102
页数：6
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