Photoconduction in the monoclinic phase of quasi-one-dimensional conductor TaS3 has been observed at T<70~K. It was studied jointly with low-temperature ohmic and non-linear dark conduction. The strong sample quality dependence of both photoconduction and dark conduction at this temperature region has been observed. Together with a similarity of the main features of the photoconduction characteristic of both monoclinic ({\it m-}TaS3) and orthorhombic ({\it o-}TaS3) samples the following new peculiarities of photoconduction in {\it m-}TaS3 were found: 1) the dependence of the activation energy of photoconduction on temperature, T, 2) the change of the recombination mechanism from the linear type to the collisional one at low T with a sample quality growth, 3) the existence of a fine structure of the electric-field dependence of photoconduction. Spectral study gives the Peierls energy gap value 2Δ∗=0.18~eV.
@article{arxiv.1411.0167,
title = {Photoconduction in the Peierls conductor monoclinic TaS$_3$},
author = {V. E. Minakova and V. F. Nasretdinova and S. V. Zaitsev-Zotov},
journal= {arXiv preprint arXiv:1411.0167},
year = {2014}
}