Enhancement of superconductivity by local inhomogeneity

Details Enhancement of superconductivity by local inhomogeneity Enhancement of superconductivity by local inhomogeneity

2005-01-27

arxiv.org/abs/cond-mat/0501659v1

Phys. Rev. B 72, 060502 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 1 eps figure

Scientific paper

10.1103/PhysRevB.72.060502

We study the effect of inhomogeneity of the paring interaction or the background potential on the superconducting transition temperature, T_c. In the weak coupling BCS regime, we find that inhomogeneity which is incommensurate with the Fermi surface nesting vectors enhances T_c relative to its value for the uniform system. For a fixed modulation strength we find that the highest T_c is reached when the characteristic modulation length scale is of the order of the superconducting coherence length.

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