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Título: | Competition between electron and phonon excitations in the scattering of nitrogen atoms and molecules off tungsten and silver metal surfaces |
Autor: | Martin-Gondre, L. CSIC ORCID; Alducin Ochoa, Maite CSIC ORCID ; Bocan, Gisela A.; Díez Muiño, Ricardo CSIC ORCID ; Juaristi Oliden, Joseba Iñaki CSIC ORCID | Fecha de publicación: | mar-2012 | Editor: | American Physical Society | Citación: | Physical Review Letters 108(9): 096101 (2012) | Resumen: | We investigate the role played by electron-hole pair and phonon excitations in the interaction of reactive gas molecules and atoms with metal surfaces. We present a theoretical framework that allows us to evaluate within a full-dimensional dynamics the combined contribution of both excitation mechanisms while the gas particle-surface interaction is described by an ab initio potential energy surface. The model is applied to study energy dissipation in the scattering of N2 on W(110) and N on Ag(111). Our results show that phonon excitation is the dominant energy loss channel, whereas electron-hole pair excitations represent a minor contribution. We substantiate that, even when the energy dissipated is quantitatively significant, important aspects of the scattering dynamics are well captured by the adiabatic approximation. | Descripción: | 4 páginas, 3 figuras.-- PACS numbers: 82.65.+r, 34.35.+a, 68.49.Df, 82.20.Kh | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.108.096101 | URI: | http://hdl.handle.net/10261/47035 | DOI: | 10.1103/PhysRevLett.108.096101 | ISSN: | 0031-9007 | E-ISSN: | 1079-7114 |
Aparece en las colecciones: | (CFM) Artículos |
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Competition between electron.pdf | 209,58 kB | Adobe PDF | Visualizar/Abrir |
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