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Surface core-level shifts on Ge(111)c(2 x 8): Experiment and theory

Kuzmin, M.; Punkkinen, M. J. P.; Laukkanen, P.; Lang, J. J. K.; Dahl, J.; Tuominen, V.; Tuominen, M.; Perala, R. E.; Thiagarajan, Balasubramanian LU and Adell, Johan LU , et al. (2011) In Physical Review B (Condensed Matter and Materials Physics) 83(24).
Abstract
Combining high-resolution photoelectron spectroscopy and density functional theory (DFT) calculations, 3d photoemission line shape and surface core-level shifts have been reinvestigated on the Ge(111)c(2 x 8) surface. It is found that 3d spectra include, in addition to the bulk and three surface-shifted components reported in literature, a component that was not identified in earlier measurements with a lower resolution. The detailed interpretation of these spectra and their line shape is made on the basis of DFT calculations. It is shown that the lowest binding energy component is due to the rest atoms. The higher binding energy emission is caused by the adatoms and the third-layer atoms that are below the adatoms. Finally, the two other... (More)
Combining high-resolution photoelectron spectroscopy and density functional theory (DFT) calculations, 3d photoemission line shape and surface core-level shifts have been reinvestigated on the Ge(111)c(2 x 8) surface. It is found that 3d spectra include, in addition to the bulk and three surface-shifted components reported in literature, a component that was not identified in earlier measurements with a lower resolution. The detailed interpretation of these spectra and their line shape is made on the basis of DFT calculations. It is shown that the lowest binding energy component is due to the rest atoms. The higher binding energy emission is caused by the adatoms and the third-layer atoms that are below the adatoms. Finally, the two other surface components originate from the first- and second-layer atoms. The screening effects in the Ge(111)c(2 x 8) are discussed. (Less)
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Physical Review B (Condensed Matter and Materials Physics)
volume
83
issue
24
publisher
American Physical Society
external identifiers
  • wos:000292183300006
  • scopus:79961221520
ISSN
1098-0121
DOI
10.1103/PhysRevB.83.245319
language
English
LU publication?
yes
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105137a2-162d-4eb4-9ed9-a011b7c30251 (old id 2036061)
date added to LUP
2011-07-26 14:14:29
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2017-07-23 04:14:34
@article{105137a2-162d-4eb4-9ed9-a011b7c30251,
  abstract     = {Combining high-resolution photoelectron spectroscopy and density functional theory (DFT) calculations, 3d photoemission line shape and surface core-level shifts have been reinvestigated on the Ge(111)c(2 x 8) surface. It is found that 3d spectra include, in addition to the bulk and three surface-shifted components reported in literature, a component that was not identified in earlier measurements with a lower resolution. The detailed interpretation of these spectra and their line shape is made on the basis of DFT calculations. It is shown that the lowest binding energy component is due to the rest atoms. The higher binding energy emission is caused by the adatoms and the third-layer atoms that are below the adatoms. Finally, the two other surface components originate from the first- and second-layer atoms. The screening effects in the Ge(111)c(2 x 8) are discussed.},
  articleno    = {245319},
  author       = {Kuzmin, M. and Punkkinen, M. J. P. and Laukkanen, P. and Lang, J. J. K. and Dahl, J. and Tuominen, V. and Tuominen, M. and Perala, R. E. and Thiagarajan, Balasubramanian and Adell, Johan and Johansson, B. and Vitos, L. and Kokko, K. and Vayrynen, I. J.},
  issn         = {1098-0121},
  language     = {eng},
  number       = {24},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Surface core-level shifts on Ge(111)c(2 x 8): Experiment and theory},
  url          = {http://dx.doi.org/10.1103/PhysRevB.83.245319},
  volume       = {83},
  year         = {2011},
}