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Type: Artigo de periódico
Title: Theoretical Investigation Of The Electrical And Optical Activity Of Vanadium In Gaas
Author: Caldas M.J.
Figueiredo S.K.
Fazzio A.
Abstract: We study the excitation and ionization processes at the isolated substitutional vanadium impurity in GaAs. The electronic structure is solved through the spin-restricted version of the multiple-scattering X method to obtain the relevant mean-field energies, and correlation effects are evaluated through the Fazzio-Caldas-Zunger multiplet approach. The similar systems GaP:V, InP:V are also investigated. Our results for GaAs:V point to the occurrence of an acceptor level at Ec-0.16 eV, the donor level appearing very close to or within the valence band. The V-related midgap acceptor should then be related to some complex defect involving vanadium. We also suggest that V2+ in these compounds is present in the low-spin ground state E2..AE © 1986 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.33.7102
Date Issue: 1986
Appears in Collections:Unicamp - Artigos e Outros Documentos

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