Proximity Effect Enhancement Induced by Roughness of SN Interface

Abstract

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 ${\xi }_a,{\xi }_b\gg {\xi }_c$.

2 pages

Cited by in corpus (4)

• Role of Interfaces in the Proximity Effect in Anisotropic Superconductors
• The Superconducting Proximity Effect as a Tool to Investigate Metal Films and Interfaces
• Severe discrepancies between experiment and theory in the superconducting proximity effect
• Quantitative Simulation of the Superconducting Proximity Effect