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Type: Artigo de periódico
Title: Intradonor absorption spectra under external fields in quantum wells
Author: Latge, A
PorrasMontenegro, N
deDiosLeyva, M
Oliveira, LE
Abstract: The effects of magnetic and electric fields on the infrared-absorption properties associated to transitions between the Is-like and 2p(+/-)-, 3p(+/-)-, and 4p(+/-)-like excited states of hydrogenic donors in GaAs-Ga1-xAlxAs quantum wells are studied. The magnetic and electric fields are applied along the growth direction of the heterostructure, and donor envelope wave functions and energies are obtained within a variational procedure in the effective-mass approximation. Calculations for the intradonor transition strengths for x-polarized radiation and absorption coefficients are performed for finite-barrier potentials and as functions of applied magnetic and electric fields and quantum-well thicknesses. A discussion of a sum rule associated to donor transitions in quantum wells is presented. Theoretical results for the absorption spectra are in good agreement with available infrared-magnetospectroscopy measurements on doped quantums wells.
Country: EUA
Editor: American Physical Soc
Citation: Physical Review B. American Physical Soc, v. 53, n. 15, n. 10160, n. 10166, 1996.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.53.10160
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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