The Energy Spectrum of Two-Electron Semiconductor Quantum Dots

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Journal Title, Volume, Page: 
Turkish Journal of Physics 01/2008; 32:79-84
Year of Publication: 
Mohammad K Elsaid
Department of Physics, College of Sciences, University of Hail (UOH) P.O.Box 2440, Hail, SAUDI ARABIA
Current Affiliation: 
Department of Physics, Faculty of Science, An-Najah National University, Nablus, Palestine
Preferred Abstract (Original): 

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 = ∆ = ET – ES, against the strength of the magnetic field for two electron quantum dot. Based on comparisons, the eigenenergies obtained by the shifted method are in excellent agreement with exact, variational, Hartree-Fock (HF) and Full-Configuration Interaction (FCI) methods.

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