Enhancement of proximity effects due to random roughness at a superconductor/metal interface
- Palasantzas, G
DOIAbstract
We consider the enhancement of proximity effects due to random roughness at a superconductor/normal-metal interface. The roughness is described by the rms roughness amplitude Delta, the correlation length xi, and the roughness exponent H(0 less than or equal to H less than or equal to 1). Small roughness exponents H ( <0.5) are shown to influence strongly the relative reduction of the superconductor critical temperature Delta T(c)/T(c). Moreover, the effect of the roughness exponent H on Delta T(c)/T(c) appears to be more pronounced than that of the long wavelength roughness ratio sigma/xi suggesting that roughness details at short roughness wavelengths should be taken properly into account in experimental studies of proximity effects. Fina...
Add to ORKG