We have investigated the exchange interaction between the localized (Formula presented) electrons of (Formula presented) transition-metal impurities and the delocalized host band electrons in II-VI semiconductors based on the configuration-interaction scheme. The exchange constant (Formula presented) in the Kondo-type effective Hamiltonian is evaluated from Ti to Ni. For Mn, Fe, and Co, (Formula presented) is negative (antiferromagnetic), and is in good agreement with experimental values. The exchange coupling of the Ti impurity is predicted to be positive (ferromagnetic) due to Hund’s coupling. For V, Cr, and Ni, in which orbital degrees of freedom is important, the sign of (Formula presented) depends on the Jahn-Teller distortion.
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 1997|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics