Abstract
We study the energy spectra of a two-dimensional two-electron quantum dot(QD) with Pöschl–Teller confining potential under the influence ofperpendicular homogeneous magnetic field. Calculations are made by using themethod of numerical diagonalization of Hamiltonian matrix within theeffective-mass approximation. A ground-state behavior (spin singlet-triplettransitions) as a function of the strength of a magnetic field isfound. We find that the dot radius R of a Pöschl–Teller potential isimportant for the ground-state transition and the feature of ground-statefor a Pöschl–Teller QD and a parabolic QD is similar when R is larger.The larger the well depth, the higher the magnetic field for thesinglet-triplet transition of the ground-state of two interacting electronsin a Pöschl–Teller QD.
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