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  1. 1 Acta Physica Polonica A

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  1. 1 1991

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  1. 1 Blinowski J.

  2. 1 Kacman P.

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Spin-Dependent Interaction of a Band Electron with Paramagnetic Impurities

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Blinowski J., Kacman P.
Acta Physica Polonica A
|
1991
|
vol. 79
|
issue 1
145-148
EN
A band electron interacting with N electrons in a d-shell of a paramagnetic impurity in zinc-blende type semiconductors was considered. The hybridization of band and d-states in the crystal field and the nonorthogonality mechanisms of interaction were examined in addition to the standard direct exchange. The Heisenberg-type form was derived for the interaction between a Γ_8-electron and an impurity with a half-filled d-shell. The domination of the hybridization mechanism explains the observed sign of the effective exchange constant for Γ_8 electrons in diluted magnetic semiconductors (DMS) and the difference in magnitude of this constant for Mn^{2+} and Fe^{3+} ions in HgSe.
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