A Negative Donor D- in a Magnetic Field

Using the method of numerical matrix diagonalization within the effective-mass approximation, we investigated a D^--center quantum dot system subjected to a Gaussian potentialconfinement. We obtain the dependence of binding energies of theground-states of the D^--center on the depth of Gaussian potential and the magnetic field strength. The result showsclearly that the binding energies of the ground-states of theD^--center are rather sensitive to the depth of potential andthe strength of magnetic field.