Abstract
We derive an effective Hamiltonian for in the dilute limit, where can be described in terms of spin polarons hopping between the Mn sites and coupled to the local Mn spins. We determine the parameters of our model from microscopic calculations. Our approach treats the large Coulomb interaction in a nonperturbative way, captures the effects of spin-orbit coupling and disorder, and is appropriate for other -doped magnetic semiconductors.
- Received 6 December 2002
DOI:https://doi.org/10.1103/PhysRevLett.91.097202
©2003 American Physical Society