Resonances in the photoemission cross section of a surface state: Results for Ag(111)
We present a model to explain the resonances in the photoemission cross section of a surface state as a function of photon energy. The model is based on an extension of the direct-transition model for bulk states, and should be applicable to a surface state with a long decay length. Energy broadening of the final states and momentum broadening of the initial surface state are included in the consideration. Resonances in the surface-state photoemission cross section are expected to occur for photon energies corresponding to direct transitions from the surface state to final Bloch states. The cross section of a surface state in Ag(111) was measured over the photon energy range of 36--65 eV, and a resonance at 54 eV was observed. The data were compared with the theoretical results. The data for a similar surface state in Cu(111), studied previously by Louie et al. (Phys. Rev. Lett. 44, 549 (1980)) were reanalyzed in terms of the present model. The results for these two systems, Ag(111) and Cu(111), will be compared.
- Research Organization:
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
- DOE Contract Number:
- AC02-76ER01198
- OSTI ID:
- 7155920
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:8; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
BLOCH THEORY
BREMSSTRAHLUNG
CROSS SECTIONS
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EXPERIMENTAL DATA
INFORMATION
LINE BROADENING
MASSLESS PARTICLES
METALS
NUMERICAL DATA
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHOTONS
RADIATIONS
RESONANCE
SECONDARY EMISSION
SILVER
SPECTROSCOPY
SURFACES
SYNCHROTRON RADIATION
TRANSITION ELEMENTS