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 impur ity in cylindrical quantum dot subjected to an external strong magnetic fie ld is presented. Calculations are performed within the effective-mass appro ximation using the variational procedure and considering an infinite confin ing potential on all surfaces of the system. The binding energy is calculat ed as a function of the dot size (radius and height), applied magnetic fiel d and donor impurity position. We found that the impurity binding energy de pends strongly on the impurity position and magnetic field strength of the dot. Our results are in good agreement with those obtained from low-dimensi onal systems. The presented results can be useful to control the spatial di stribution of the donor center in the microstructure. (C) 2000 Elsevier Sci ence B.V. All rights reserved.