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Título

Lifetimes and mean-free paths of hot electrons in the alkali metals

AutorDolado, J. S.; Silkin, Viatcheslav M.; Cazalilla, M. A. ; Rubio, Angel; Echenique, Pedro M.
Fecha de publicaciónoct-2001
EditorAmerican Physical Society
CitaciónPhysical Review B 64: 195128 (2001)
ResumenWe report first principle calculations of electron and hole inelastic lifetimes for alkali metals (Na and K) within the framework of the GW approximation of many-body theory. The results show that at low energies the lifetimes are slightly smaller than prediction of a free-electron model, and that there is no noticeable momentum-direction dependence. We also look at the inelastic mean-free path λ, and conclude that the observed drops at a few eV in λ for the alkali elements with a strong d-band character cannot be attributed to the effect of these d bands in the lifetime, but to a crossover behavior of the velocity of the photoelectron.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.64.195128
URIhttp://hdl.handle.net/10261/98705
DOI10.1103/PhysRevB.64.195128
ISSN1098-0121
E-ISSN1550-235X
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