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Título: | Calculation of low-energy-electron lifetimes |
Autor: | Zarate, E.; Appel, H.; Echenique, Pedro M. CSIC ORCID | Fecha de publicación: | 1999 | Editor: | American Physical Society | Citación: | Physical Review B 60(4): 2326-2332 (1999) | Resumen: | The effect of the density of states on the lifetime of low-energy electrons in metals has been studied using a golden rule approach. Simple approximations to the real density of states of metals have been used allowing analytical results, which show that the free-electron scaling (E−EF)−2 of the lifetime is affected above the onset of d-electron contributions. Hence, in noble metals a scaling with (E−EF−ωd)−2, where ωd is the energy distance from the Fermi energy to the top of the d band, appears once d electrons can be excited. In ferromagnetic Co, the ratio between the lifetimes of majority and minority spin electrons is found energy independent below the threshold for the excitation of majority d electrons while this ratio increases with energy above that point. | Versión del editor: | https://doi.org/10.1103/PhysRevB.60.2326 | URI: | http://hdl.handle.net/10261/224240 | DOI: | 10.1103/PhysRevB.60.2326 | ISSN: | 0163-1829 |
Aparece en las colecciones: | (CFM) Artículos |
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calculifeti.pdf | 132,15 kB | Adobe PDF | Visualizar/Abrir |
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