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.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Jun 15 2005|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics