The role of confinement and shape on the binding energy of an electron in a quantum dot

The impurity ground state binding energy in cubic and cylindrical GaAs/AlAs quantum dots has been calculated using a variational procedure within the effective mass approximation. We exploit the impurity ground state energy under an external electric field strongly affected by the anisotropy of the...

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Published inPhysica. E, Low-dimensional systems & nanostructures Vol. 40; no. 8; pp. 2698 - 2702
Main Authors Sucu, S., Mese, A.I., Okan, S.E.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.06.2008
Elsevier
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cubic and cylindrical geometry
Electric field
Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Physics
Quantum dots
71.55.−I
71.55.Eq
Electric field
Quantum dots
Cubic and cylindrical geometry
73.20.Dx
Aluminium arsenides
External fields
Gallium arsenides
Confinement
71.55.-I
Ground states
Variational methods
Effective mass model
Cylindrical shape
Anisotropy
Electric field effects
Binding energy
Impurity states
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Summary:The impurity ground state binding energy in cubic and cylindrical GaAs/AlAs quantum dots has been calculated using a variational procedure within the effective mass approximation. We exploit the impurity ground state energy under an external electric field strongly affected by the anisotropy of the quantum dots more than their shapes.
ISSN:1386-9477
1873-1759
DOI:10.1016/j.physe.2007.12.017