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Type: Artigo de periódico
Title: Renormalization Group Treatment For The Electronic Spectrum Of Partially Ordered One-dimensional Alloys
Author: Koiller B.
Robbins M.O.
Davidovich M.A.
Goncalves da Silva C.E.T.
Abstract: A new approach is presented for the calculation of the local density of electronic states in partially ordered binary chains. The method is based on recursion relations for renormalized tight-binding Hamiltonian parameters. Diagonal, off-diagonal and environmental disorder are easily incorporated for all degrees of short-range order. The method takes into account compositional fluctuations of arbitrary range; the states are found to be localized and the calculated densities of states are richly structured. The only approximation is in the configurational averaging over species at decimated sites. The method is computationally very simple, and gives an interpolation scheme for all concentrations and degrees of short-range order, becoming exact in the ordered and dilute limits. Our results are compared with published numerical data, and schemes for improvement are discussed. © 1983.
Rights: fechado
Identifier DOI: 10.1016/0038-1098(83)90964-X
Date Issue: 1983
Appears in Collections:Unicamp - Artigos e Outros Documentos

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