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Type: Artigo de periódico
Title: Binding Energies And Density Of Impurity States Of Shallow Hydrogenic Impurities In Cylindrical Quantum-well Wires
Author: Porras Montenegro N.
Lapez-Gondar J.
Oliveira L.E.
Abstract: The binding energies of hydrogenic impurities in both infinite and finite GaAs-(Ga,Al)As cylindrical quantum-well wires are calculated as functions of the wire radius and of the impurity location in the well for different radii of the wires using a variational procedure within the effective-mass approximation. Assuming there is no intentional doping, we treat the impurity position as a random variable and define a density of impurity states that we have calculated as a function of the impurity binding energy. As a general feature, the density of impurity states presents two structures associated with impurities at the center and at the edge of the quantum-well wire that may be important in the understanding of absorption and photoluminescence experiments of doped GaAs-(Ga,Al)As quantum-well wires. © 1991 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.43.1824
Date Issue: 1991
Appears in Collections:Unicamp - Artigos e Outros Documentos

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