Artículos de revistas
Donor-related magneto-optical absorption spectra of GaAs-(Ga,Al)As quantum wells
Journal Of Physics-condensed Matter. Iop Publishing Ltd, v. 9, n. 15, n. 3181, n. 3187, 1997.
The effects of applied magnetic fields on the optical absorption spectra associated with transitions from the Landau valence magnetic levels to shallow donor states in GaAs-(Ga, AI)As quantum wells are studied for magnetic fields applied perpendicular to the heterostructure interfaces. The donor-related magneto-absorption spectra are calculated within the effective-mass approximation, and with a minimization procedure for evaluating donor energies and envelope wave functions. We consider a homogeneous donor distribution in the well and analyse the theoretical impurity-related magneto-absorption spectra for various quantum well widths and applied magnetic fields. The magneto-absorption lineshapes present features clearly associated with transitions involving donor states and different valence Landau magnetic levels.91531813187