Role of solitons in non-equilibrium electronic transport through a polymer chain

Author: Wang Jia   Yang Yue   Yao Yao   Wu Chang-Qin  

Publisher: Edp Sciences

E-ISSN: 1286-4854|102|6|67003-67003

ISSN: 0295-5075

Source: EPL (EUROPHYSICS LETTERS), Vol.102, Iss.6, 2013-07, pp. : 67003-67003

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Abstract

Non-equilibrium electronic transport through a polymer chain is investigated by the scattering state operator method. The polymer chain is described by an electron-lattice coupling model and its two ends are connected with metal electrodes of different chemical potentials. The scattering states are shown to be a set of complete eigenstates of electrons in the system at non-equilibrium steady state. With this method, we show that the non-equilibrium Peierls transition (NEPT) does not survive the lattice relaxation and the soliton-antisoliton pair excitations. Furthermore the electronic transport is shown to be accomplished through the soliton-lattice energy band.