On the nature of threshold electric field in quasi-one-dimensional commensurate charge-density-waves
Abstract
The theory of nonlinear conductivity of commensurate charge-density-waves based on the soliton-tunneling mechanism is proposed. The well known empirical expression ?( E)= ?N+;(1- {ET}/{E}) ?0· exp(- E0/( E- ET))θ( E- ET) is obtained within the frames of self-consistent investigation taking into account the coherant Coulomb interaction of charged solitons. The threshold field ET is the deconfinement field of bound soliton-antisoliton pairs. The universality relation ETɛ(0)= const ( E(0) -static dielectric susceptibility) is also obtained. The phenomenological treatment of localized free charges explains the dependence ET∼ 2i (; i-impurity concentration).
- Publication:
-
Solid State Communications
- Pub Date:
- August 1985
- DOI:
- 10.1016/0038-1098(85)90235-2
- Bibcode:
- 1985SSCom..55..691K