  We extend previous work to consider the effect of the soliton on the density
of states and conductivity of quasi-one-dimensional Peierls systems with
quantum lattice fluctuations, modeled by a random static disorder. Two features
have been verified over an order of magnitude variation in the disorder. (1)
The soliton density of states and the leading edges of both the soliton-to-band
and the band-to-band conductivities have universal scaling forms. (2) The
soliton-to-band conductivity has the remarkable feature that the leading edge
is accurately predicted by the joint density of states while the trailing edge
tracks the rigid-lattice conductivity. Or, in other words, disorder dominates
the leading edge, while matrix element effects are predominant for the trailing
edge.
