Journal
62ND DAE SOLID STATE PHYSICS SYMPOSIUM
Volume 1942, Issue -, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5028648
Keywords
Energy spectrum; Magnetic moment; Magnetic susceptibility; Gaussian quantum dot
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The problem of two interacting electrons moving in a two-dimensional semiconductor quantum dot with Gaussian confinement under the influence of an external magnetic field is studied by using a method of numerical diagonalization of the Hamiltonian matrix with in the effective-mass approximation. The energy spectrum is calculated as a function of the magnetic field. We find the ground state magnetic moment and the magnetic susceptibility show zero temperature diamagnetic peaks due to exchange induced singlet-triplet oscillations. The position and the number of these peaks depend on the size of the quantum dot and also strength of the electro-electron interaction. The theory is applied to a GaAs quantum dot.
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