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Surface core level shift of the Be 1s level observed from a Be(0001) single crystal surface

Nyholm, R. LU ; Flodström, A. S.; Johansson, L. I.; Hörnström, S. E. and Schmidt-May, J. N. (1985) In Surface Science 149(2-3). p.449-459
Abstract

We have used surface sensitive photoelectron spectroscopy to study the Be 1s core level from the Be(0001) single crystal surface. Two core peaks are observed, one from the bulk atoms, and the other from the first layer surface atoms. They are separated in binding energy by 0.50 eV, the surface peak being located at lower binding energy. This experimental surface core level shift (SCS) is compared to calculated SCSs using different assumptions on the character of the initial and final state of the photoionized Be metal atoms in the bulk and at the surface. A final state having the Al (sp)3 valence configuration yields a SCS of the right direction and magnitude. The surface core peak is found to be broader than the bulk core... (More)

We have used surface sensitive photoelectron spectroscopy to study the Be 1s core level from the Be(0001) single crystal surface. Two core peaks are observed, one from the bulk atoms, and the other from the first layer surface atoms. They are separated in binding energy by 0.50 eV, the surface peak being located at lower binding energy. This experimental surface core level shift (SCS) is compared to calculated SCSs using different assumptions on the character of the initial and final state of the photoionized Be metal atoms in the bulk and at the surface. A final state having the Al (sp)3 valence configuration yields a SCS of the right direction and magnitude. The surface core peak is found to be broader than the bulk core peak. We attribute the main broadening in both the bulk and the surface peaks to phonon shake-up and discuss this using a simple model due to Flynn. © 1985.

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author
publishing date
type
Contribution to journal
publication status
published
in
Surface Science
volume
149
issue
2-3
pages
11 pages
publisher
Elsevier
external identifiers
  • Scopus:4243904051
ISSN
0039-6028
DOI
10.1016/0039-6028(85)90074-3
language
English
LU publication?
no
id
4f381da9-f3a6-467c-b990-caff0c4ef3e7
date added to LUP
2016-08-19 11:20:24
date last changed
2016-09-16 14:53:38
@misc{4f381da9-f3a6-467c-b990-caff0c4ef3e7,
  abstract     = {<p>We have used surface sensitive photoelectron spectroscopy to study the Be 1s core level from the Be(0001) single crystal surface. Two core peaks are observed, one from the bulk atoms, and the other from the first layer surface atoms. They are separated in binding energy by 0.50 eV, the surface peak being located at lower binding energy. This experimental surface core level shift (SCS) is compared to calculated SCSs using different assumptions on the character of the initial and final state of the photoionized Be metal atoms in the bulk and at the surface. A final state having the Al (sp)<sup>3</sup> valence configuration yields a SCS of the right direction and magnitude. The surface core peak is found to be broader than the bulk core peak. We attribute the main broadening in both the bulk and the surface peaks to phonon shake-up and discuss this using a simple model due to Flynn. © 1985.</p>},
  author       = {Nyholm, R. and Flodström, A. S. and Johansson, L. I. and Hörnström, S. E. and Schmidt-May, J. N.},
  issn         = {0039-6028},
  language     = {eng},
  month        = {01},
  number       = {2-3},
  pages        = {449--459},
  publisher    = {ARRAY(0x7f58b20)},
  series       = {Surface Science},
  title        = {Surface core level shift of the Be 1s level observed from a Be(0001) single crystal surface},
  url          = {http://dx.doi.org/10.1016/0039-6028(85)90074-3},
  volume       = {149},
  year         = {1985},
}