Spin waves in paramagnetic BCC iron: spin dynamics simulations

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dc.creatorTao, Xiuping
dc.creatorLandau, D. P.
dc.creatorSchulthess, T. C.
dc.creatorStocks, G. M.
dc.date2005-01-28
dc.date.accessioned2026-07-07T06:17:56Z
dc.date.available2026-07-07T06:17:56Z
dc.descriptionLarge scale computer simulations are used to elucidate a longstanding controversy regarding the existence, or otherwise, of spin waves in paramagnetic BCC iron. Spin dynamics simulations of the dynamic structure factor of a Heisenberg model of Fe with first principles interactions reveal that well defined peaks persist far above Curie temperature T_c. At large wave vectors these peaks can be ascribed to propagating spin waves, at small wave vectors the peaks correspond to over-damped spin waves. Paradoxically, spin wave excitations exist despite only limited magnetic short-range order at and above T_c.
dc.descriptionSubmitted to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0501713
dc.identifierhttp://arxiv.org/abs/cond-mat/0501713
dc.identifierPhys. Rev. Lett. 95, 087207 (2005)
dc.identifierdoi:10.1103/PhysRevLett.95.087207
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/94566
dc.subjectMaterials Science
dc.titleSpin waves in paramagnetic BCC iron: spin dynamics simulations
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