Singularities in core-level spectra near metallic surfaces

Despoja, Vito and Šunjić, Marijan and Marušić, Leonardo (2008) Singularities in core-level spectra near metallic surfaces. Physical Review B, 77 (3). pp. 35424-8. ISSN 1098-0121

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Calculations of the screening shift and dynamical singularity index of the structureless core hole placed near and inside the metallic slab are presented, where the screening mechanism is described using the quantum-mechanical response function calculated in the local density approximation. Core-hole screening shifts show oscillations which are compared with the experimental results. Spatial dependence of the static singularity index, besides experimentally observed enhancement at the surface, shows some new features (bulk oscillations) which were not yet experimentally observed. The dynamical singularity index is used to calculate complete core hole spectrum, including singular line shapes and bulk and surface plasmon losses, and the results explain very well some observed features in the experimental photoemission spectra.

Item Type: Article
Keywords: X-ray spectroscopy, DS-line shape, core level spectra, electron-hole excitations
Date: January 2008
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2008) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191458-1011
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 29 May 2014 19:56
Last Modified: 29 May 2014 19:56

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