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Type: Artigo de periódico
Title: Soliton clusters inducing insulator-to-metal transition in polyacetylene: a Su-Schrieffer-Heeger model study
Author: Lavarda, FC
Galvao, DS
Laks, B
Abstract: The Su-Schrieffer-Heeger (SSH) Hamiltonian has been one of most used models to study the electronic structure of polyacetylene (PA) chains. It has been reported in the literature that in the SSH framework a disordered soliton distribution can not produce a metallic regime. However, in this work (using the same SSH model and parameters) we show that this is possible. The necessary conditions for true metals (non-vanishing density of states and extended wavefunctions around the Fermi level) are obtained for soliton concentration higher than 6% through soliton segregation (clustering). These results are consistent with recent experimental data supporting disorder as an essential mechanism behind the high conductivity of conducting polymers. (C) 2001 Elsevier Science B.V. All rights reserved.
Subject: Su-Schrieffer-Heeger models
conducting polymers
metallic transition
Country: Suíça
Editor: Elsevier Science Sa
Citation: Synthetic Metals. Elsevier Science Sa, v. 123, n. 2, n. 211, n. 215, 2001.
Rights: fechado
Identifier DOI: 10.1016/S0379-6779(00)01506-X
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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