LEED AND EELS STUDIES ON VANADIUM (110) AND (111) SINGLE-CRYSTAL SURFACES

Citation
K. Nakayama et S. Usami, LEED AND EELS STUDIES ON VANADIUM (110) AND (111) SINGLE-CRYSTAL SURFACES, Surface science, 287, 1993, pp. 355-360
Citations number
11
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
00396028
Volume
287
Year of publication
1993
Part
A
Pages
355 - 360
Database
ISI
SICI code
0039-6028(1993)287:<355:LAESOV>2.0.ZU;2-1
Abstract
The surface atomic arrangements and the electronic states of vanadium (110) and (111) single crystals have been investigated at room tempera ture with low energy electron diffraction (LEED) and electron spectros copic techniques. LEED was observed with a CCD camera. The LEED patter n of the most densely packed (I 10) plane showed no extra features bey ond those expected for the bulk, while the (111) surface was observed to reconstruct into a (square-root 3 x square-root 3)R30-degrees super structure. Electron energy loss spectra for both specimens were also m easured with primary electrons in the low energy range from 100 to 300 eV. The loss peaks observed for the (110) and (111) surfaces could be attributed to such common energy losses as bulk and surface plasmons, interband transitions and inner-shell excitations. However, the magni tudes of the observed plasmon loss energy with low energy incidence fo r the (111) surface differ from values calculated on the basis of Ritc hie's formula [Phys. Rev. 106 (1957) 874].