Magnetopolaron effects on the intradonor 1s-2p+ transition energies in a GaAs - AlGaAs double quantum well

In this work we present a calculation of the intradonor 1s-2p+ transition energies for an impurity donor present in a GaAs-AlGaAs Double Quantum Well structure as a function of an applied external magnetic field. In our calculation the impurity energy levels were obtained from a variational method b...

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Bibliographic Details
Published inBrazilian journal of physics Vol. 36; no. 2a; pp. 354 - 356
Main Authors Osório, F. A. P., Machado, Paulo C. M., Borges, A. N.
Format Journal Article
LanguageEnglish
Portuguese
Published Sociedade Brasileira de Física 01.06.2006
Subjects
PHYSICS, MULTIDISCIPLINARY
Magnetic field
Intradonor 1s-2p+ transition
GaAs-AlGaAs Double Quantum Well
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Summary:In this work we present a calculation of the intradonor 1s-2p+ transition energies for an impurity donor present in a GaAs-AlGaAs Double Quantum Well structure as a function of an applied external magnetic field. In our calculation the impurity energy levels were obtained from a variational method by choosing a Gaussian trial wave function, and the energy corrections due to the polaronic effect were included by second order perturbation theory IWBPT as modified by Cohn, Larsen and Lax. We have considered only the GaAs bulk LO phonon in the electron-phonon coupling. A very good agreement between the theoretical and experimental results for a DQW consisting of two 100 Å well widths separated by a 100 Å potential barrier width was obtained.
ISSN:0103-9733
1678-4448
DOI:10.1590/S0103-97332006000300032