Effect of spin-conserving scattering on Gilbert damping in ferromagnetic semiconductors

Details Effect of spin-conserving scattering on Gilbert damping in ferromagnetic semiconductors Effect of spin-conserving scattering on Gilbert damping in ferromagnetic semiconductors

2010-01-26

arxiv.org/abs/1001.4576v1

Phys. Rev. B 81, 193201 (2010)

Physics

Condensed Matter

Materials Science

4 pages

Scientific paper

10.1103/PhysRevB.81.193201

The Gilbert damping in ferromagnetic semiconductors is theoretically investigated based on the $s$-$d$ model. In contrast to the situation in metals, all the spin-conserving scattering in ferromagnetic semiconductors supplies an additional spin relaxation channel due to the momentum dependent effective magnetic field of the spin-orbit coupling, thereby modifies the Gilbert damping. In the presence of a pure spin current, we predict a new contribution due to the interplay of the anisotropic spin-orbit coupling and a pure spin current.

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