Journal article
Interference of direct transitions and surface emission in ARPES studied by changing the light incidence angle
Publication Details
Authors: | Michalke, T.; Gerlach, A.; Berge, K.; Matzdorf, R.; Goldmann, A. |
Publication year: | 2000 |
Journal: | Physical Review B |
Pages range : | 10544-10547 |
Journal acronym: | Phys. Rev. |
Volume number: | 62 |
Start page: | 10544 |
End page: | 10547 |
ISSN: | 1098-0121 |
Abstract
The contributions of direct transitions [f\(A) over right arrow.(p) over right arrow \i] and surface emission [f\div (A) over right arrow \i] in angle-resolved photoelectron spectroscopy spectra can be varied considerably by changing the incidence angle of p-polarized light. Due to interference of both contributions line shape and asymmetry of certain peaks change dramatically as a function of light incidence direction. This effect has been studied in detail at an s.p band of copper and a photon energy of h omega =21.2 eV. Our experimental data can be explained quantitatively within a physically transparent model calculation, which supplies a criterion to distinguish between bulk direct and surface emission.
The contributions of direct transitions [f\(A) over right arrow.(p) over right arrow \i] and surface emission [f\div (A) over right arrow \i] in angle-resolved photoelectron spectroscopy spectra can be varied considerably by changing the incidence angle of p-polarized light. Due to interference of both contributions line shape and asymmetry of certain peaks change dramatically as a function of light incidence direction. This effect has been studied in detail at an s.p band of copper and a photon energy of h omega =21.2 eV. Our experimental data can be explained quantitatively within a physically transparent model calculation, which supplies a criterion to distinguish between bulk direct and surface emission.
