METAL-INSULATION TRANSITION IN FULLERITOS DOPADOS WITH ALKALINE METALS

Ciência E Natura

Endereço:
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ISSN: 2179-460X
Editor Chefe: Marcelo Barcellos da Rosa
Início Publicação: 30/11/1979
Periodicidade: Quadrimestral

METAL-INSULATION TRANSITION IN FULLERITOS DOPADOS WITH ALKALINE METALS

Ano: 1996 | Volume: 18 | Número: 18
Autores: José Carlos Cechin, Ronaldo Mota
Autor Correspondente: José Carlos Cechin | [email protected]

Palavras-chave: fullerites doped , gutzwiller

Resumos Cadastrados

Resumo Inglês:

In this paper we study the occurrence of metallic and insulating characters in fullerites doped with alkali metals. In particular, the occurrence of the metal phase in potassium doped systems and the non-occurrence of this phase in sodium doped systems are analyzed via the Gutzwiller approximation in a degenerate Hubbard model. By using interaction parameters and bandwidths derived from INDO-CI calculations in the molecular agglomeration approach, in models similar to those presented previously by Coutinho, Canuto, Mota and Fazzio, the metal-insulating transitions are discussed in these systems.