Proximity Effect Enhancement Induced by Roughness of SN Interface

Details Proximity Effect Enhancement Induced by Roughness of SN Interface Proximity Effect Enhancement Induced by Roughness of SN Interface

1997-09-29

arxiv.org/abs/cond-mat/9709314v1

Phys. Rev. B 57, 10318 (1998)

Physics

Condensed Matter

Superconductivity

2 pages

Scientific paper

10.1103/PhysRevB.57.10318

Critical temperature reduction $\Delta T_c$ is considered for a thin film of a layered superconductor (S) with a rough surface covered by a thick layer of a normal metal (N). The roughness of the SN interface increases the penetration of electrons from the normal metal into the superconductor and leads to an enhancement of the proximity effect. The value of $\Delta T_c$ induced by the roughness of the SN interface can be much higher than $\Delta T_c$ for a film with a plain surface for an extremely anisotropic layered superconductor with the coherence lengths $\xi_a,\xi_b\gg\xi_c$.

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