Pinning in Peierls-Fröhlich State and Conductivity

Abstract

The equation is derived which describes the dynamics of the phase of the charge density wave in the Peierls-Fröhlich state in the presence of the impurity scattering. By use of the correlation function of the phase, the frequency dependence of the electrical conductivity, σ(ω), is calculated at T=0 K for the case of weak pinning forces. It is found that σ(ω) has a pronounced peak at a finite ω and that the theoretical results. If ω is replaced by (T−T_p) where T_p is the transition temperature the results are reminiscent of the conductivity in the region of fluctuations.