Superconductivity and charge-density waves
L. L. Daemen, A. W. Overhauser
DOI 10.1103/PhysRevB.40.124 · Physical Review B
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Abstract
Superconductivity in a metal with a charge-density-wave (CDW) broken symmetry is investigated within the framework of Bardeen-Cooper-Schrieffer theory. The anisotropic gap equation for Δ(k) is solved analytically. We find that whenever k approaches a CDW energy gap, Δ(k) undergoes a sudden increase. This behavior is the opposite of that found for a spin-density-wave (SDW) broken symmetry, for which Δ(k) decreases precipitously as k approaches a SDW energy gap.
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