Article,

First-principles multiple scattering theory of quasiparticle lifetimes in ferromagnetic materials

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Journal of Magnetism and Magnetic Materials, 272-276 (Part 1): 466--467 (May 2004)

Abstract

We develop a first-principles approach for evaluating the lifetimes of excited electrons in Fe and Ni based on the self-energy formalism of many-body theory. The GW approximation is applied for the lowest self-energy term whereas the high-order terms are evaluated within T-matrix approach. Both for Ni and Fe we find important contributions of the T-matrix self-energy terms corresponding to the excited electron scattering from spin waves.

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