Abstract: | A study is made of the effect of deviation from half-filling of the energy band (![mgr](/content/v030786832711n14/xxlarge956.gif) 0) on the Fröhlich collective mode in onedimensional impurity systems. A low impurity concentration is considered, and the infinite series of impurity scattering is taken into account self-consistently in the determination of the collective mode Green's function. The conductivity ( ) is found in terms of this Green's function, and an analytic expression is obtained for ( ) at ![ohgr](/content/v030786832711n14/xxlarge969.gif) ![sim](/content/v030786832711n14/xxlarge8764.gif)
T
(
T
is the pinning frequency). It is shown that for the ratio Re( ( )/ max) a universal formula arises. It differs from the results of Kurihara in the expression for
T
, which contains an essential dependence on in the incommensurate state of the charge density wave. It is also shown that the width of the peak in the dependence ( ) and its position increase with increasing .Institute of Applied Physics, Moldovan Academy of Sciences. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 101, No. 1, pp. 110–122, October, 1994. |