Abnormal minigap induced by superconducting proximity effects in a metallic film

被引：1
|
作者：
Yu Hua-Ling [1 ]
机构：
[1] Huaiyin Normal Coll, Dept Phys & Elect, Huaian 223001, Peoples R China
来源：
ACTA PHYSICA SINICA | 2007年 / 56卷 / 10期
关键词：
superconductor proximity effects; Andreev reflection; coherent tunneling; sequential tunneling;
D O I：
10.7498/aps.56.6038
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The scattering matrix approach is applied to study tunneling spectra in normal metal/normal metal/ superconductor double junctions. The abnormal minigap in tunneling conductance is attributed to the phase coherence of electrons and Andreev- reflected holes in the middle metallic film. We consider a combination of the coherent tunneling with the sequential tunneling and the calculated results provide a reasonable explanation for the abnormal minigap observed in recent experiments.
引用
收藏
页码：6038 / 6044
页数：7
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