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

作者信息

Qian Zhixin, Vignale Giovanni

机构信息

Department of Physics, University of Missouri, Columbia, Missouri 65211, USA.

出版信息

Phys Rev Lett. 2002 Feb 4;88(5):056404. doi: 10.1103/PhysRevLett.88.056404. Epub 2002 Jan 17.

DOI:10.1103/PhysRevLett.88.056404
PMID:11863758
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.

摘要

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