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Type: Artigo de periódico
Title: Generation and control of spin-polarized photocurrents in GaMnAs heterostructures
Author: Bezerra, AT
Castelano, LK
Degani, MH
Maialle, MZ
Farinas, PF
Studart, N
Abstract: Photocurrents are calculated for a specially designed GaMnAs semiconductor heterostructure. The results reveal regions in the infrared range of the energy spectrum, in which the proposed structure is remarkably spin-selective. For such photon energies, the generated photocurrents are strongly spin-polarized. Application of a relatively small static bias in the growth direction of the structure is predicted to efficiently reverse the spin-polarization for some photon energies. This behavior suggests the possibility of conveniently simple switching mechanisms. The physics underlying the results is studied and understood in terms of the spin-dependent properties emerging from the particular potential profile of the structure. (C) 2014 AIP Publishing LLC.
Country: EUA
Editor: Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1063/1.4861656
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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