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https://repositorio.ufba.br/handle/ri/24500
metadata.dc.type: | Artigo de Periódico |
Título : | Electron g factor anisotropy in asymmetric III–V semiconductor quantum wells |
Autor : | Sandoval, M A Toloza Silva, E A de Andrada e Silva, A Ferreira da Rocca, G C La |
metadata.dc.creator: | Sandoval, M A Toloza Silva, E A de Andrada e Silva, A Ferreira da Rocca, G C La |
Resumen : | 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. |
Palabras clave : | Semiconductor quantum wells Spin–orbit interaction Electron g factor |
metadata.dc.publisher.country: | Brasil |
Editorial : | SEMICONDUCTOR SCIENCE AND TECHNOLOGY (PRINT) |
metadata.dc.rights: | Acesso Aberto |
URI : | http://repositorio.ufba.br/ri/handle/ri/24500 |
Fecha de publicación : | 27-sep-2016 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Renorbio) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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10.10880268-12423111115008.pdf | 688,86 kB | Adobe PDF | Visualizar/Abrir |
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