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J Phys Condens Matter. 2008 Nov 19;20(46):465220. doi: 10.1088/0953-8984/20/46/465220. Epub 2008 Oct 27.

Effects of hydrostatic pressure on the electron [Formula: see text] factor and g-factor anisotropy in GaAs-(Ga, Al)As quantum wells under magnetic fields.

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  • 1Departamento de Física, Universidad del Valle, AA 25360, Cali, Colombia. Instituto de Física, UNICAMP, CP 6165, Campinas, São Paulo, 13083-970, Brazil.

Abstract

The hydrostatic-pressure effects on the electron-effective Landé [Formula: see text] factor and g-factor anisotropy in semiconductor GaAs-Ga(1-x)Al(x)As quantum wells under magnetic fields are studied. The [Formula: see text] factor is computed by considering the non-parabolicity and anisotropy of the conduction band through the Ogg-McCombe effective Hamiltonian, and numerical results are displayed as functions of the applied hydrostatic pressure, magnetic fields, and quantum-well widths. Good agreement between theoretical results and experimental measurements in GaAs-(Ga, Al)As quantum wells for the electron g factor and g-factor anisotropy at low values of the applied magnetic field and in the absence of hydrostatic pressure is obtained. Present results open up new possibilities for manipulating the electron-effective g factor in semiconductor heterostructures.

PMID:
21693858
[PubMed]
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