Although (Ga,Mn)As is considered the model ferromagnetic semiconductor, the electronic structure of the charges — holes in this case — and its connection with the Curie temperature (TC) are still unclear. Experiments now provide a direct link between TC and the existence of an impurity band for the holes. Clarifying this issue is essential to designing other materials with potentially higher TC.
- M. Dobrowolska
- K. Tivakornsasithorn
- W. Walukiewicz
