Gapped optical excitations from gapless phases: Imperfect nesting in unconventional density waves

Balázs Dóra, András Ványolos, Kazumi Maki, Attila Virosztek

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We consider the effect of imperfect nesting in quasi-one-dimensional unconventional density waves in the case in which the imperfect nesting and the gap depends on the same wave-vector component. The phase diagram is very similar to that in a conventional density wave. The density of states is highly asymmetric with respect to the Fermi energy. The optical conductivity at T=0 remains unchanged for small deviations from perfect nesting. For a higher imperfect nesting parameter, an optical gap opens, and a considerable amount of spectral weight is transferred to higher frequencies. This makes the optical response of our system very similar to that of a conventional density wave. Qualitatively similar results are expected in d-density waves.

Original languageEnglish
Article number245101
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number24
DOIs
Publication statusPublished - Jun 15 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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