Semiconductor Magnetism

Diluted magnetic semiconductors

this family of material

magnetic impurities in semiconductors

we can describe the DMS according to the model in which the electron states can divided in to two categories:

(i) localized magnetic d or f shells (ii) extended band states built up of s, p, and some times d atomic orbitals

The starting point for developing a useful predictive model of (III-Mn)V ferromagnetism is understanding of the electronic state with the single Mn impurity in the host lattice. we need to understand the charecter of Mn local moments before we explein how these isolated local moments are coupled. Ao we discuss the property of Mn impurity in GaAs and on the nature of ferromagnetic coupling in (Ga, Mn)As.

Between (

Fig. 1: Histogram of the logarithm of the conductance for $W=1.0t$ in the non-interacting case. Here we have t=1.0,L=400, and performed 2000 realizations of disorder.In this case the conductance does not include the contact resistance.