Paramagnetic instability at normal-metal-superconductor interfaces

被引:53
作者
Fauchère, AL [1 ]
Belzig, W
Blatter, G
机构
[1] ETH Zurich, CH-8093 Zurich, Switzerland
[2] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany
关键词
D O I
10.1103/PhysRevLett.82.3336
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the proximity coherence in a mesoscopic normal-metal film in contact with a superconductor. Accounting for a repulsive interaction between the electrons in the normal metal, we find an enhanced local density of states close to the normal-metal-superconductor intel face. The sharp peak in the density is pinned to the Fermi energy and leads to spontaneous paramagnetic interface currents. The induced orbital magnetic moments exhibit the characteristic features of the paramagnetic reentrance observed in normal-metal coated superconducting cylinders [P. Visani, A.C. Mota, and A. Pollini, Phys. Rev. Lett. 65, 1514 (1990)]. [S0031-9007(99)08939-5].
引用
收藏
页码:3336 / 3339
页数:4
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