We present theoretical results on the effects of particle-particle interaction and single spin- frac(5, 2) magnetic impurity ( Mn2 +) on the paramagnetism of interacting spherical quantum dots(QDs). Within the effective mass approximation, the energy spectrum, magnetization, and magnetic susceptibility of the semi-magnetic QDs with electron number Ne = 1 - 4 are calculated by using the configuration interaction method. It is found that the sp-d coupling between carrier and Mn2 + magnetic ion gives rise to suppression or enhancement of paramagnetism, sensitively depending on electron number and the location of ion. The magnetic properties of the dot with Ne = 3, 4 exhibit pronounced anisotropy due to the anti-symmetry character of the p-shell wave functions coupled to magnetic ion.
|Number of pages||5|
|Journal||Physica E: Low-Dimensional Systems and Nanostructures|
|Issue number||1-2 SPEC. ISS.|
|State||Published - 1 May 2006|
- Diluted magnetic quantum dots
- Semi-magnetic quantum dot