General Form of Magnetization Damping: Magnetization dynamics of a spin system evolving nonadiabatically and out of equilibrium

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dc.creatorSaradzhev, F. M.
dc.creatorKhanna, F. C.
dc.creatorKim, Sang Pyo
dc.creatorde Montigny, M.
dc.date2006-09-18
dc.date2006-11-14
dc.date.accessioned2026-07-07T10:24:15Z
dc.date.available2026-07-07T10:24:15Z
dc.descriptionUsing an effective Hamiltonian including the Zeeman and internal interactions, we describe the quantum theory of magnetization dynamics when the spin system evolves non-adiabatically and out of equilibrium. The Lewis-Riesenfeld dynamical invariant method is employed along with the Liouville-von Neumann equation for the density matrix. We derive a dynamical equation for magnetization defined with respect to the density operator with a general form of magnetization damping that involves the non-equilibrium contribution in addition to the Landau-Lifshitz-Gilbert equation. Two special cases of the radiation-spin interaction and the spin-spin exchange interaction are considered. For the radiation-spin interaction, the damping term is shown to be of the Gilbert type, while in the spin-spin exchange interaction case the results depend on a coupled chain of correlation functions.
dc.description9 pages, revtex4 file, 2 eps-figures; title and abstract changed; minor changes in the body of text; version to appear in Physical Review B
dc.identifierhttps://arxiv.org/abs/cond-mat/0609431
dc.identifierhttp://arxiv.org/abs/cond-mat/0609431
dc.identifierPhys.Rev.B75:024406,2007
dc.identifierdoi:10.1103/PhysRevB.75.024406
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176121
dc.subjectOther Condensed Matter
dc.subjectHigh Energy Physics - Theory
dc.titleGeneral Form of Magnetization Damping: Magnetization dynamics of a spin system evolving nonadiabatically and out of equilibrium
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