تقرير
Energy loss of atoms at metal surfaces due to electron-hole pair excitations: First-principles theory of 'chemicurrents'
| العنوان: | Energy loss of atoms at metal surfaces due to electron-hole pair excitations: First-principles theory of 'chemicurrents' |
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| المؤلفون: | Trail, J. R., Graham, M. C., Bird, D. M., Persson, M., Holloway, S. |
| المصدر: | Phys. Rev. Lett. 88, 166802 (2002) |
| سنة النشر: | 2009 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | A method is presented for calculating electron-hole pair excitation due to an incident atom or molecule interacting with a metal surface. Energy loss is described using an \textit{ab initio} approach that obtains a position-dependent friction coefficient for an adsorbate moving near a metal surface from a total energy pseudopotential calculation. A semi-classical forced oscillator model is constructed, using the same friction coefficient description of the energy loss, to describe excitation of the electron gas due to the incident molecule. This approach is applied to H and D atoms incident on a Cu(111) surface, and we obtain theoretical estimates of the `chemicurrents' measured by Nienhaus et al [Phys. Rev. Lett. \textbf{82}, 446 (1999)] for these atoms incident on the surface of a Schottky diode. Comment: 4 pages, 2 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.88.166802 |
| URL الوصول: | http://arxiv.org/abs/0909.5496 |
| رقم الأكسشن: | edsarx.0909.5496 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.88.166802 |
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