Spin-Dependent Interaction of a Band Electron with Paramagnetic Impurities

• Authors: J. Blinowski , P. Kacman
• Languages of publication: EN

Abstracts

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.

Keywords

EN

75.50.Pp; 75.30.-m; 71.70.-d

Discipline

• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)
• 75.50.Pp: Magnetic semiconductors
• 71.70.-d: Level splitting and interactions(see also 73.20.-r Surface and interface electron states; 75.30.Et Exchange and superexchange interactions)

• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 79
• Issue: 1
• Pages: 145-148

Dates

published

1991-01

received

1990-08-08

Contributors

author

J. Blinowski

• Institute of Theoretical Physics, Warsaw University, ul. Hoża 69, 00-681 Warsaw, Poland

author

P. Kacman

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

Identifiers

DOI

10.12693/APhysPolA.79.145