The energy spectrum of two-electron semiconductor quantum dots

The ground-state properties of a two-dimensional quantum-dot are studied. We have used the shifted 1/N expansion method to solve the relative part Hamiltonian of two electrons confined in a quantum in the presence of an applied uniform magnetic field.The spin singlet-triplet transition in the ground...

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Bibliographic Details
Published in:Turkish journal of physics 2008-01, Vol.32 (2), p.79-84
Main Author: ELSAID, Mohammad K
Format: Article
Language:English
Subjects:
Electricity, Magnetism and Optics
Electronic Structure, Electrical, Magnetic and Optical Properties
Elektrik, Manyetizma ve Optik
Elektronik Yapı, Elektriksel, Manyetik ve Optik Özellikler
energy gap
Energy spectrum
Enerji aralığı
Enerji spektrumu
İki elektronlu sistem
Kuantum noktası
magnetic field
Manyetik alan
quantum dot
two-electron system
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Summary:The ground-state properties of a two-dimensional quantum-dot are studied. We have used the shifted 1/N expansion method to solve the relative part Hamiltonian of two electrons confined in a quantum in the presence of an applied uniform magnetic field.The spin singlet-triplet transition in the ground state of the QD is shown.We have also displayed the singlet-triplet energy gap,#J=\Delta=E_T-E_S$ against the strength of the magnetic field for two electron quantum dot. Based on comparisons, the eigenenergies obtained by the shifted method are in excellen agreement with exact, variational,Hartree-Fock(HF)and Full-Configuration Interaction (FCI) methods.
ISSN:1300-0101