Insulator-to-metal transition driven by clustering of solitons in polyacetylene
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Data
1997-03-15
Autores
Lavarda, Francisco Carlos [UNESP]
Galvão, D. S.
Laks, B.
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Resumo
It's believed that the simple Su-Schrieffer-Heeger Hamiltonian can not predict the insulator to metal transition of transpolyacetylene (t-PA). The soliton lattice configuration at a doping level y=6% still has a semiconductor gap. Disordered distributions of solitons close the gap, but the electronic states around the Fermi energy are localized. However, within the same framework, it is possible to show that a cluster of solitons can produce dramatic changes in the electronic structure, allowing an insulator-to-metal transition.
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Metal-insulator phase transitions, Polyacetylene and derivatives, Crystal lattices, Electronic structure, Energy gap, Fermi level, Phase transitions, Polyacetylenes, Semiconducting polymers, Semiconductor doping, Metal to insulator phase transition, Soliton clustering, Solitons
Como citar
Synthetic Metals, v. 85, n. 1-3, p. 1083-1084, 1997.