Spin dynamics from time-dependent spin density-functional theory

Details Spin dynamics from time-dependent spin density-functional theory Spin dynamics from time-dependent spin density-functional theory

2001-08-11

arxiv.org/abs/cond-mat/0108193v1

Physics

Condensed Matter

Materials Science

8 pages, no figures

Scientific paper

10.1103/PhysRevLett.88.056404

We derive the spin-wave dynamics of a magnetic material from the time-dependent spin density functional theory in the linear response regime. The equation of motion for the magnetization includes, besides the static spin stiffness, a "Berry curvature" correction and a damping term. A gradient expansion scheme based on the homogeneous spin-polarized electron gas is proposed for the latter two quantities, and the first few coefficients of the expansion are calculated to second order in the Coulomb interaction.

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