Theory of Magnetic Properties and Spin-Wave Dispersion for Ferromagnetic (Ga,Mn)As

Details Theory of Magnetic Properties and Spin-Wave Dispersion for Ferromagnetic (Ga,Mn)As Theory of Magnetic Properties and Spin-Wave Dispersion for Ferromagnetic (Ga,Mn)As

2001-03-05

arxiv.org/abs/cond-mat/0103116v2

Phys. Rev. B 64, 184423 (2001)

Physics

Condensed Matter

Materials Science

9 pages, 4 figures

Scientific paper

10.1103/PhysRevB.64.184423

We present a microscopic theory of the long-wavelength magnetic properties of the ferromagnetic diluted magnetic semiconductor (Ga,Mn)As. Details of the host semiconductor band structure, described by a six-band Kohn-Luttinger Hamiltonian, are taken into account. We relate our quantum-mechanical calculation to the classical micromagnetic energy functional and determine anisotropy energies and exchange constants. We find that the exchange constant is substantially enhanced compared to the case of a parabolic heavy-hole-band model.

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