Spin dynamics from time-dependent spin density-functional theory

Abstract

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.

8 pages, no figures

References in corpus (1)

• Short-range correlation in the uniform electron gas: Extended Overhauser model

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