Journal
PHYSICAL REVIEW B
Volume 72, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.72.060502
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We study the effect of inhomogeneity of the pairing 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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