Charge-density waves physics revealed by photoconduction

Abstract

The results of photoconduction study of the Peierls conductors are reviewed. The studied materials are quasi-one-dimensional conductors with the charge-density wave: K${}_{0.3}$MoO${}_3$, both monoclinic and orthorhombic TaS${}_3$ and also a semiconducting phase of NbS${}_3$ (phase I). Experimental methods, relaxation times, effects of illumination on linear and nonlinear charge transport, the electric-field effect on photoconduction and results of the spectral studies are described. We demonstrate, in particular, that a simple model of modulated energy gap slightly smoothed by fluctuations fits the available spectral data fairly well. The level of the fluctuations is surprisingly small and does not exceed a few percent of the optical energy gap value.

7 pages, 11 figures. To be published in Physica B

References in corpus (6)

• Electronic crystals: an experimental overview
• Universal subgap optical conductivity in quasi-one-dimensional Peierls systems
• Photoconduction in CDW conductors
• Photoconduction in the Peierls conductor monoclinic TaS${}_3$
• Photoconduction and photocontrolled collective effects in the Peierls conductor TaS${}_3$
• Indium doping-induced change in the photoconduction spectra of o-TaS3

Cited by in corpus (2)

• Photoconduction in the Peierls conductor monoclinic TaS${}_3$
• Indium doping-induced change in the photoconduction spectra of o-TaS3