Optical spectral weight distribution in d-wave superconductors

Details Optical spectral weight distribution in d-wave superconductors Optical spectral weight distribution in d-wave superconductors

2004-04-08

arxiv.org/abs/cond-mat/0404192v1

Phys. Rev. B, Vol. 69, 224501 (2004)

Physics

Condensed Matter

Superconductivity

14 Pages, 9 Figures, Accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.69.224501

The distribution in frequency of optical spectral weight remaining under the real part of the optical conductivity in the superconducting state of a d-wave superconductor depends on impurity concentration, on the strength of the impurity potential as well as on temperature and there is some residual absorption even at T = 0. In BCS theory the important weight is confined to the microwave region if the scattering is sufficiently weak. In an Eliashberg formulation substantial additional weight is to be found in the incoherent, boson assisted background which falls in the infrared and is not significantly depleted by the formation of the condensate, although it is shifted as a result of the opening of a superconducting gap.

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