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Quasiparticle dynamics in ferromagnetic compounds of the Co–Fe and Ni–Fe systems

AuthorsNechaev, I. A.; Chulkov, Eugene V.
Issue DateSep-2010
EDP Sciences
CitationEuropean Physical Journal B: Condensed Matter and Complex Systems 77(1): 31-40 (2010)
AbstractWe report a theoretical study of the quasiparticle lifetime and the quasiparticle mean free path caused by inelastic electron-electron scattering in ferromagnetic compounds of the Co–Fe and Ni–Fe systems. The study is based on spin-polarized calculations, which are performed within the G 0 W 0 approximation for equiatomic and Co(Ni)-rich compounds, as well as for their constituents. We mainly focus on the spin asymmetry of the quasiparticle properties, which leads to the spin-filtering effect experimentally observed in spin-dependent transport of hot electrons and holes in the systems under study. By comparing with available experimental data on the attenuation length, we estimate the contribution of the inelastic mean free path to this length.
Description10 páginas, 10 figuras, 1 tabla.-- El pdf del artículo es la versión pre-print: arXiv:1005.0679v2
Publisher version (URL)http://dx.doi.org/10.1140/epjb/e2010-00236-9
Appears in Collections:(CFM) Artículos
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