Journal
PHYSICA B-CONDENSED MATTER
Volume 460, Issue -, Pages 185-190Publisher
ELSEVIER
DOI: 10.1016/j.physb.2014.11.066
Keywords
Peierls conductors; Charge-density wave; Photoconduction; Electron transport; Collective transport
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Funding
- RFBR [14-02-01236]
- Department of Physical Science of RAS
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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 (m-TaS3) and orthorhombic (o-TaS3) samples the following new peculiarities of photoconduction in 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, and (3) the existence of a fine structure of the electric-field dependence of photoconduction. Spectral study gives the Peierls energy gap value 2 Delta* = 0.18 eV. 2015 Published by Elsevier B.V.
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