Relation between the Tc degradation and the correlation gap in disordered superconductors

D. Belitz

doi:10.1103/PhysRevB.40.111

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Relation between the Tc degradation and the correlation gap in disordered superconductors

D. Belitz

DOI 10.1103/PhysRevB.40.111 · Physical Review B

T1

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Abstract

It is shown theoretically that for both bulk and thin-film superconductors the dominant contributions to the disorder-induced degradation of Tc can be expressed in terms of the disorder-induced suppression δN of the normal-state electronic density of states. This explains the correlation found experimentally between Tc and δN, and it eliminates the resistivity scale as an adjustable parameter for comparison between theory and experiment. Agreement with recent experimental results on Pb is very good. We also discuss the disorder dependence of the superconducting gap.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown