Transition temperature of ferromagnetic semiconductors: a dynamical mean field study

Details Transition temperature of ferromagnetic semiconductors: a dynamical mean field study Transition temperature of ferromagnetic semiconductors: a dynamical mean field study

2001-06-22

arxiv.org/abs/cond-mat/0106455v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.87.227202

We formulate a theory of doped magnetic semiconductors such as Ga$_{1-x}$Mn$_x$As which have attracted recent attention for their possible use in spintronic applications. We solve the theory in the dynamical mean field approximation to find the magnetic transition temperature $T_c$ as a function of magnetic coupling strength $J$ and carrier density $n$. We find that $T_c$ is determined by a subtle interplay between carrier density and magnetic coupling.

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