Evidence for collective linear conduction in the Peierls conductor o-TaS_3

Details Evidence for collective linear conduction in the Peierls conductor o-TaS_3 Evidence for collective linear conduction in the Peierls conductor o-TaS_3

2005-12-07

arxiv.org/abs/cond-mat/0512153v2

Physics

Condensed Matter

Materials Science

RevTeX4, 4 pages, 4 figures. Revised version with more detailed discussion. To be published in Physical Review Letters

Scientific paper

Using photoconduction study we demonstrate that the low-temperature Ohmic conduction of TaS$_3$ is not provided by single-particle excitations -- electrons and holes excited over the Peierls gap. Instead, the low-temperature Ohmic conduction is mostly provided by collective excitations having the activation energy about half of the Peierls gap value and shunting the contribution of electrons and holes.

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