Reflectivity Anisotropy Spectra of Cu- and Ag- (110) surfaces from {\it ab initio} theory

Details Reflectivity Anisotropy Spectra of Cu- and Ag- (110) surfaces from {\it ab initio} theory Reflectivity Anisotropy Spectra of Cu- and Ag- (110) surfaces from {\it ab initio} theory

2000-05-12

arxiv.org/abs/cond-mat/0005209v1

Physics

Condensed Matter

Materials Science

4 pages, 3 figures. submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevB.64.115421

We are able to disentagle the effects of the intraband and interband parts of the bulk dielectric function on the bare dielectric anisotropy of the surface. We show how the position, sign and amplitude of the structures observed in such spectra depend on the above quantities. The lineshape of all the calculated structures agree very well with the ones observed experimentally for samples treated by suitable surface cleaning. In particular, we reproduce the observed single peak structure of Ag at high energy, found to represent a state of the clean surface different from the one giving the originally observed double peak structure. This results is not reproduced by the 'local field' model.

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