Impurity states of electrons in quantum dots in external magnetic fields

Details Impurity states of electrons in quantum dots in external magnetic fields Impurity states of electrons in quantum dots in external magnetic fields

2008-09-30

arxiv.org/abs/0809.5065v1

Eur. Phys. J. B 66, 223-226 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 2 figures, to be published in European Physical Journal B

Scientific paper

10.1140/epjb/e2008-00392-5

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.

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