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Título: | Lifetimes of quantum well states and resonances in Pb overlayers on Cu(111) |
Autor: | Zugarramurdi, A. CSIC; Zabala, Nerea CSIC ORCID; Silkin, Viatcheslav M. CSIC ORCID; Borisov, Andrei G. CSIC; Chulkov, Eugene V. CSIC ORCID | Fecha de publicación: | 2009 | Editor: | American Physical Society | Citación: | Physical Review B 80(11): 115425 (2010) | Resumen: | We present results of calculations of the lifetimes of excited electrons (holes) in quantum well states and quantum well resonances in Pb overlayers supported on Cu(111). Many-body decay via inelastic energy relaxation and one-electron decay via energy-conserving one-electron transfer into the substrate are considered. One-electron energies and wave functions have been computed for different coverages of the Pb overlayer (from 1 to 18 monolayers) by using a one-dimensional pseudopotential for the entire overlayer-substrate system in the framework of density functional theory within the local density approximation. The elastic (energy-conserving resonant electron transfer) contribution to the total lifetime broadening of quantum well resonances has been calculated within the wave packet propagation method. The inelastic electron-electron (many-body) contribution to the lifetime broadening of both occupied and unoccupied quantum well states has been evaluated using GW approximation. The decay mechanisms of both quantum well states and quantum well resonances in thick overlayers are discussed. | Descripción: | 11 páginas, 8 figuras, 1 tabla.-- PACS number(s): 73.21.Fg, 73.50.Gr, 73.20.At, 78.47.-p.-- Trabajo presentado al "DIPC10 : Passion for Knowledge" celebrado en Donostia (España) del 27 de septiembre al 1 de octubre de 2010. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevB.80.115425 | URI: | http://hdl.handle.net/10261/44492 | DOI: | 10.1103/PhysRevB.80.115425 | ISSN: | 1098-0121 | E-ISSN: | 1550-235X |
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