Fluctuation Conductivity in One-Dimensional Incommensurate Peierls System
Open Access
- 1 June 1978
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 59 (6) , 1802-1811
- https://doi.org/10.1143/ptp.59.1802
Abstract
The fluctuation conductivity in the incommensurate Peierls system above the transition temperature is calculated in the lowest order of fluctuations so as to satisfy the gauge invariance. Effects of forward electron-scattering due to impurities are taken into account as well as those of backward scattering. It is shown that in the pure limit the conductivity is enhanced by fluctuations like (T-Tc)-1/2 when λ>λc≈1.2, λ being the dimensionless coupling constant. While in the dirty limit, the conductivity is reduced by fluctuations. Essential features are qualitatively similar to those given by Patton and Sham except λc≈1.6 and effects of the forward scattering. Effects of the forward scattering does not affect the result in the pure limit, while the resistivity is strongly increased by the forward scattering in the dirty limit.Keywords
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