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Binding energy of hydrogenic impurity states in an inverse parabolic quantum well under electric field

✍ Scribed by Sotirios Baskoutas; Andreas F. Terzis

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 327 KB
Volume: 40
Category: Article
ISSN: 1386-9477
DOI: 10.1016/j.physe.2007.09.046

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✦ Synopsis

Using the potential morphing method in the effective mass approximation, we have studied the behavior of the impurity binding energy as a function of the impurity position, for different applied electric fields, different Al concentrations at the well center, in strong, intermediate and weak confinement, for a GaAs/Ga 1Àx Al x As inverse parabolic quantum well. Our results indicate that the impurity binding energy has the same behavior as the spatial distribution of the electron ground state wavefunction and also that an electron localization appears only in the intermediate and weak confinement regime when the electric field takes non-zero values.

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