Journal article
Nanoscale surface optical constants of copper determined by angle-resolved photoemission
Publication Details
Authors: | Gerlach, A.; Pforte, F.; Liese, D.; Meister, G.; Goldmann, A.; Michalke, T. |
Publication year: | 2001 |
Journal: | Surface Science |
Pages range : | 214-224 |
Volume number: | 492 |
ISSN: | 0039-6028 |
Abstract
We study angle-resolved photoemission peak intensities I(psi) on Cu(110) and Cu(111) surfaces varying the light incidence angle psi of p-polarized light with photon energies between h omega = 8.44 eV and h omega = 21.22 eV. Transitions out of several initial states are probed, including the well-known surface states at the <()over bar> and (Y) over bar -point, bulk bands of sp- and d-like orbital character, as well as an oxygen-derived adsorbate state on Cu(110)(2 x 1)O. All data can well be explained within the dipole approximation I(psi) = /(A) over right arrow(psi, epsilon) (.) (P) over right arrow (fi)/(2), where (A) over right arrow is the vector potential of the photon field and (P) over right arrow (fi) the momentum matrix element. Especially it is not necessary to include "surface photoemission" via a
We study angle-resolved photoemission peak intensities I(psi) on Cu(110) and Cu(111) surfaces varying the light incidence angle psi of p-polarized light with photon energies between h omega = 8.44 eV and h omega = 21.22 eV. Transitions out of several initial states are probed, including the well-known surface states at the <()over bar> and (Y) over bar -point, bulk bands of sp- and d-like orbital character, as well as an oxygen-derived adsorbate state on Cu(110)(2 x 1)O. All data can well be explained within the dipole approximation I(psi) = /(A) over right arrow(psi, epsilon) (.) (P) over right arrow (fi)/(2), where (A) over right arrow is the vector potential of the photon field and (P) over right arrow (fi) the momentum matrix element. Especially it is not necessary to include "surface photoemission" via a
