Electronic structure of ellipsoidally deformed quantum dots

Using a three-dimensional local spin-density functional method, we investigate the electronic structure of quasi two-dimensional ellipsoidal quantum dots with elliptical deformation. Changes in the electron addition energy spectra and spin polarization are investigated as a function of the number of electrons and the elliptical deformation on the lateral direction confinement potential, and compared with those of a circular dot which shows a shell structure. Especially, we find that, due to the electron-electron interaction, the anisotropy of an elliptical dot is higher than that of a bare potential by ~1.2 for experimentally realistic potentials.