Magnetic field effect on the binding energy of a hydrogenic impurity in cylindrical quantum dot

A systematic study of the ground state binding energy of a hydrogenic impurity in cylindrical quantum dot subjected to an external strong magnetic field is presented. Calculations are performed within the effective-mass approximation using the variational procedure and considering an infinite confining potential on all surfaces of the system. The binding energy is calculated as a function of the dot size (radius and height), applied magnetic field and donor impurity position. We found that the impurity binding energy depends strongly on the impurity position and magnetic field strength of the dot. Our results are in good agreement with those obtained from low-dimensional systems. The presented results can be useful to control the spatial distribution of the donor center in the microstructure. (C) 2000 Elsevier Science B.V. All rights reserved.