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Phys Rev Lett. 2006 Dec 31;97(26):266404. Epub 2006 Dec 28.

Evidence of collective charge transport in the ohmic regime of o-TaS(3) in the charge-density-wave state by a photoconduction study.

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1
Institute of Radioengineering and Electronics of RAS, 125009 Mokhovaya 11, Moscow, Russia.

Abstract

Using photoconduction techniques, we demonstrate that the low-temperature Ohmic conduction of o-TaS3 is not provided by band motion or hopping of single-particle excitations-electrons and holes excited over the Peierls gap. Instead, the low-temperature Ohmic conduction is mostly provided by collective excitations having an activation energy much less than the Peierls gap value and shunting the contribution of electrons and holes responsible for photoconduction.

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