External electric field effects on the electronic and hydrogenic impurity states in ellipsoidal and semi-ellipsoidal quantum dots

In the effective mass approximation, energy eigenvalues of an electron confined in ellipsoidal and semi-ellipsoidal quantum dots, with and without hydrogenic impurity, under the influence of an external electric field have been investigated, using the matrix diagonalization method. The lower-laying states of the electron as functions of the electric field strength, the dot size and its geometry are calculated. Our results show that the electronic states are strongly affected by the applied electric field, the size and the geometry of the dot.

Electronic states of ellipsoidal (a) and semi-ellipsoidal (b) QDs as a function of electric field strength with (full curves) and without (dashed curves) hydrogenic impurity.Figure optionsDownload as PowerPoint slideHighlights
► Electric field effect on the electronic states of EQD and SEQD are investigated.
► Energy eigenvalues of the system are obviously affected by the applied electric field.
► Electronic and impurity states strongly depend on the dot size and its geometry.