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Unoccupied electronic resonances of Sc adsorbed on W(001) by k-resolved inverse photoemissionScandium adsorbed on the (001) face of tungsten has been studied using Auger-electron spectroscopy, low-energy electron diffraction, k-resolved inverse photoelectron spectroscopy, work-function measurements, and relativistic-electronic-structure calculations. We find that the work function of W(001) does not decrease monotonically as a function of scandium adsorption but reaches a minimum value of Phi = 3.25 eV at 50% coverage. For a complete monolayer, an order 1 X 1 Sc overlayer is formed. Inverse photoemission in the isochromat mode was used to map the unoccupied energy levels of this overlayer along the bar-Gamma(bar-Mu) symmetry direction of the surface Brillouin zone. Local-density-functional calculations using the muffin-tin orbital method were performed for a 1 X 1 Sc overlayer on W and are compared with the experimental two-dimensional band structure.
Document ID
19970003488
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lamouri, A.
(NASA Lewis Research Center Cleveland, OH United States)
Krainsky, I. L.
(NASA Lewis Research Center Cleveland, OH United States)
Petukhov, A. G.
(Case Western Reserve Univ. Cleveland, OH United States)
Lambrecht, W. R. L.
(Case Western Reserve Univ. Cleveland, OH United States)
Segall, B.
(Case Western Reserve Univ. Cleveland, OH United States)
Date Acquired
August 17, 2013
Publication Date
January 15, 1995
Publication Information
Publication: Physical Review B
Publisher: American Physical Society
Volume: 51
Issue: 3
ISSN: 0163-1829
Subject Category
Atomic And Molecular Physics
Report/Patent Number
NAS 1.15:112128
NASA-TM-112128
Accession Number
97N70213
Distribution Limits
Public
Copyright
Public Use Permitted.
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