Impurity effects in unconventional density waves in the unitary limit

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Abstract

We investigate the effect of strong, nonmagnetic impurities on quasi-one-dimensional conventional and unconventional density waves (UDW). The conventional case remains unaffected similarly to s-wave superconductors in the presence of weak, nonmagnetic impurities. The thermodynamic properties of UDW were found to be identical to those of a d-wave superconductor in the unitary limit. The real and imaginary part of the optical conductivity is determined for electric fields applied in the perpendicular directions. A structure can be present corresponding to excitations from the bound state at the Fermi energy to the gap maximum, in addition to the usual peak at 2Δ. In the dc limit, universal electric conductivity is found.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number7
DOIs
Publication statusPublished - Jan 1 2003

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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