Photoelectron-diffraction effects and circular dichroism in core-level photoemission

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.6203· OSTI ID:6971942

Westphal, C; Kaduwela, A P ^[1]; Fadley, C S ^[2]; Van Hove, M A ^[1]

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1. Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
2. Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States) Department of Physics, University of California-Davis, Davis, California 95616 (United States)

We have calculated the circular dichroism associated with core-level photoemission using multiple-scattering photoelectron-diffraction theory. For C 1[ital s] emission in a chiral geometry from CO adsorbed on Pd(111), photoelectron-diffraction calculations predict the dichroism found in experimental results due to Bansmann [ital et] [ital al]. and also agree well with prior free-molecule calculations by McKoy and Stephens. Backscattering from the Pd substrate is also found to alter the dichroic asymmetries for different adsorption geometries. Analogous calculations for Fe 2[ital p] emission from a small Fe cluster also indicate that dichroism due to a chiral geometry can strongly affect measurements of magnetic circular dichroism in systems with net magnetization. With generalization to include spin-orbit and multiplet splittings in the initial state and spin-dependent scattering of the outgoing electrons, photoelectron-diffraction theory thus should provide a general method for modeling dischroism in core-level photoemission from both nonmagnetic and magnetic systems.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6971942
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:9; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665000* -- Physics of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
ELECTRON SPECTROSCOPY
ELEMENTS
EMISSION
METALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PLATINUM METALS
SECONDARY EMISSION
SPECTROSCOPY
SUBSTRATES
TRANSITION ELEMENTS