Interlayer coupling in ferromagnetic semiconductor superlattices

Details Interlayer coupling in ferromagnetic semiconductor superlattices Interlayer coupling in ferromagnetic semiconductor superlattices

1998-10-08

arxiv.org/abs/cond-mat/9810100v2

Phys. Rev. B 59, 9818 (1999)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.59.9818

We develop a mean-field theory of carrier-induced ferromagnetism in diluted magnetic semiconductors. Our approach represents an improvement over standard RKKY model allowing spatial inhomogeneity of the system, free-carrier spin polarization, finite temperature, and free-carrier exchange and correlation to be accounted for self-consistently. As an example, we calculate the electronic structure of a Mn$_x$Ga$_{1-x}$As/GaAs superlattice with alternating ferromagnetic and paramagnetic layers and demonstrate the possibility of semiconductor magnetoresistance systems with designed properties.

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