Nonequilibrium Peierls Transition

Details Nonequilibrium Peierls Transition Nonequilibrium Peierls Transition

2009-01-14

arxiv.org/abs/0901.1917v3

Prog. Theor. Phys. 121 (2009), 1289

Physics

Condensed Matter

Statistical Mechanics

30 pages, 21 frigures

Scientific paper

10.1143/PTP.121.1289

Nonequlibrium phase transition of an open Takayama-Lin Liu-Maki chain coupled with two reservoirs is investigated by combining a mean-field approximation and a formula characterizing nonequlibrium steady states, which is obtained from the algebraic field approach to nonequlibrium statistical mechanics. When the bias voltage is chosen to be a control parameter, the phase transition between ordered and normal phases is found to be first or second order. Then, the voltage-current characteristics is S-shaped in some parameter region. In contrast, when the current is chosen to be a control parameter, all the non-trivial solutions of the self-consistent equation are found to become stable. In this case, the phase transition between the ordered and normal phases is always second order and negative differential conductivity appears at low temperature.

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