Skip navigation
Universidade Federal da Bahia |
Repositório Institucional da UFBA
Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/24500
Tipo: Artigo de Periódico
Título: Electron g factor anisotropy in asymmetric III–V semiconductor quantum wells
Autor(es): Sandoval, M A Toloza
Silva, E A de Andrada e
Silva, A Ferreira da
Rocca, G C La
Autor(es): Sandoval, M A Toloza
Silva, E A de Andrada e
Silva, A Ferreira da
Rocca, G C La
Abstract: The electron effective g factor tensor in asymmetric III–V semiconductor quantum wells (AQWs) and its tuning with the structure parameters and composition are investigated with envelope-function theory and the 8´8 k · p Kane model. The spin-dependent terms in the electron effective Hamiltonian in the presence of an external magnetic field are treated as a perturbation and the g factors * ^ g and * g , for the magnetic field in the QW plane and along the growth direction, are obtained analytically as a function of the well width L. The effects of the structure inversion asymmetry (SIA) on the electron g factor are analyzed. For the g-factor main anisotropy D = *- * g g^ g in AQWs, a sign change is predicted in the narrow well limit due to SIA, which can explain recent measurements and be useful in spintronic applications. Specific results for narrow-gap AlSb InAs GaSb and AlxGa1-xAs GaAs AlyGa1-yAs AQWs are presented and discussed with the available experimental data; in particular InAs QWs are shown to not only present much larger g factors but also a larger g-factor anisotropy, and with the opposite sign with respect to GaAs QWs.
Palavras-chave: Semiconductor quantum wells
Spin–orbit interaction
Electron g factor
País: Brasil
Editora / Evento / Instituição: SEMICONDUCTOR SCIENCE AND TECHNOLOGY (PRINT)
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/24500
Data do documento: 27-Set-2016
Aparece nas coleções:Artigo Publicado em Periódico (Renorbio)

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
10.10880268-12423111115008.pdf688,86 kBAdobe PDFVisualizar/Abrir
Mostrar registro completo do item Visualizar estatísticas


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.