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arXiv · 1411.0167

Photoconduction in the Peierls conductor monoclinic TaS$_3$

V. E. Minakova·V. F. Nasretdinova·S. V. Zaitsev-Zotov
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Abstract

Photoconduction in the monoclinic phase of quasi-one-dimensional conductor TaS$_3$ 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-}TaS$_3$) and orthorhombic ({\it o-}TaS$_3$) samples the following new peculiarities of photoconduction in {\it m-}TaS$_3$ 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.

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V. E. Minakova, V. F. Nasretdinova, S. V. Zaitsev-Zotov. 2014-11-01. Photoconduction in the Peierls conductor monoclinic TaS$_3$. https://doi.org/10.1016/j.physb.2014.11.066

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