Impurity states of electrons in quantum dots in external magnetic fields
Department of Theoretical Physics, V.N. Karazin Kharkiv National University, 4 Svobody square, 61077 Kharkiv, Ukraine
Corresponding author: a firstname.lastname@example.org
Revised: 24 September 2008
Published online: 24 October 2008
The influence of isolated impurity atoms on the electron energy spectrum in a parabolic quantum dot in quantizing magnetic field is studied. The impurity potential is approximated by a Gaussian separable operator which allows one to obtain the exact solution of the problem. We demonstrate that in the electron energy spectrum there is a set of local levels which are split from the Landau zone boundaries in the upward or downward direction depending on the impurity type. We have calculated the local level positions, the wave functions of electrons in bound states, and the residues of the electron scattering amplitudes by impurity atoms at the poles.
PACS: 73.21.La – Quantum dots / 71.70.Di – Landau levels / 71.55.-i – Impurity and defect levels
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008