Gilbert damping in conducting ferromagnets. II. Model tests of the torque-correlation formula

2008/08/28 by Ion Garate, A. H. MacDonald, Allan MacDonald · 5 citations
Materials Science · Physics and Astronomy · #Magnetic Properties and Applications #Magnetic properties of thin films #Quantum and electron transport phenomena #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.79.064404

published as Phys. Rev. B 79, 064404 (2009) · 10 pages, 10 figures. Submitted to Phys. Rev. B

arxiv created 2008/08/28 · openalex publication_date 2009/02/05 · arxiv updated 2010/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report on a study of Gilbert damping due to particle-hole pair excitations in conducting ferromagnets. We focus on a toy two-band model and on a four-band spherical model which provide an approximate description of ferromagnetic (Ga,Mn)As. These models are sufficiently simple that disorder-ladder-sum vertex corrections to the long-wavelength spin-spin response function can be summed to all orders. An important objective of this study is to assess the reliability of practical approximate expressions which can be combined with electronic structure calculations to estimate Gilbert damping in more complex systems.

Citations

• Modern Quantum Mechanics

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