Magnetopolaron effect in CdTe cylindrical quantum dot

This study analyzes the role of the magnetic field and the polaron effect o n the binding energy of shallow donor impurities in a cylindrical quantum d ot (QD), where the magnetic field is applied in the axial direction. The in teractions of carrier charges (electron and ion) with the confined longitud inal optical phonons as well as the side surface and top surface optical ph onons are considered. Calculations are made using the effective-mass approx imation within the variational approach for an infinite confinement potenti al at all surfaces of the system. Results are obtained as a function of the dot sizes (radius and height) and the donor impurity position for several magnetic field strengths. Emphasis is put on the dependence of the polaroni c correction on the magnetic field and the impurity position. The presented results can be useful to control the spatial distribution of the donor cen ter in the QD. (C) 2000 American Institute of Physics. [S0021-8979(00)02818 -8].