Gapless superconductivity in ferromagnet/superconductor junctions

被引：42
作者：
Sun, GY
Xing, DY [1 ]
Dong, JM
Liu, M
机构：
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[3] Southeast Univ, Dept Phys, Nanjing 210096, Peoples R China
来源：
PHYSICAL REVIEW B | 2002年 / 65卷 / 17期
关键词：
D O I：
10.1103/PhysRevB.65.174508
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Nambu spinor Green's function approach is applied to study the proximity effect in ferromagnet/superconductor (FM/SC) junctions. It is found that gapless superconductivity appears in both FM and SC regions near the FM/SC interface. In FM the superconducting order parameter induced by the proximity effect displays a damped oscillation. When the distance from the interface increased, following a transition from the "0 state" to the "pi state," the induced superconducting density of states in FM is flipped with respect to the normal state. Quantitative agreement is obtained between the calculated results and recent tunneling spectra in Al/Al2O3/PbNi/Nb tunnel junctions. In particular, peak and dip behavior of the induced superconducting DOS in FM is well reproduced.
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页码：1 / 5
页数：5
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