Crucial role of decoherence for electronic transport in molecular wires: Polyaniline as a case study

Details Crucial role of decoherence for electronic transport in molecular wires: Polyaniline as a case study Crucial role of decoherence for electronic transport in molecular wires: Polyaniline as a case study

2010-04-30

arxiv.org/abs/1004.5552v2

Phys. Rev. B 82, 144201 (2010)

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 10 figures. Submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.82.144201

In this work we attempt to elucidate the nature of conductivity in polymers by taking the acid-base doped polyaniline (PAni) polymer. We evaluate the PAni conductance by using realistic ab initio parameters and including decoherent processes within the minimal parametrization model of D'Amato-Pastawski. In contrast to general wisdom, which associates the conducting state with coherent propagation in a periodic polaronic lattice, we show that decoherence can account for high conductance in the strongly disordered bipolaronic lattice. Hence, according to our results, there is no need of considering a mix model of "conducting" polaronic lattice islands separated by "insulating" bipolaronic lattice strands as is usually assumed for PAni. We find that without dephasing events, even very short strands of bipolaronic lattices are not able to sustain electronic transport. We also include a discussion of specific mechanisms that should be involved in decoherence rates of PAni and relate them with Marcus-Hush theory of electron transfer.

Affiliated with

Also associated with

No associations

Rating

Crucial role of decoherence for electronic transport in molecular wires: Polyaniline as a case study has received 1 rating(s) and 0 review(s), resulting in an average rating of 3.50 on a scale from 1 to 5. The overall rating for this scientific paper is good.

If you have personal experience with Crucial role of decoherence for electronic transport in molecular wires: Polyaniline as a case study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crucial role of decoherence for electronic transport in molecular wires: Polyaniline as a case study will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-388544