Rl. Hota et al., THEORY OF EFFECTIVE G-FACTORS AND EFFECTIVE MASSES IN DILUTED MAGNETIC SEMICONDUCTORS, Physical review. B, Condensed matter, 47(15), 1993, pp. 9319-9327
We derive an expression for the effective g factor in the presence of
magnetic impurities. The expression is suitably modified as to make it
applicable to diluted magnetic semiconductors. We calculate the effec
tive g factors and effective masses in Pb1-xMnxTe and Pb1-xMnxSe using
a k.pi band model developed and used previously for nonmagnetic terna
ry semiconductors by us. It is found that, while the exchange interact
ion between the conduction electrons and the magnetic impurities contr
ibutes significantly to the effective g factor, the exchange effects a
re marginal in the case of effective masses. Both quantities are calcu
lated for the band edges, as well as for different carrier concentrati
ons, as functions of magnetic-impurity concentration. The calculated r
esults and trends obtained are in overall agreement with experimental
results where available. The expression for the effective g factor der
ived is general in the sense that it can be applied to other diluted m
agnetic semiconductors with suitable modifications.