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Size-dependent evolution of electronic structure in neutral Pb clusters-As seen by synchrotron-based X-ray photoelectron spectroscopy

Tchaplyguine, Maxim LU ; Öhrwall, Gunnar LU ; Andersson, T.; Svensson, S.; Bjorneholm, O.; Huttula, M.; Mikkela, M.; Urpelainen, Samuli LU ; Osmekhin, S. and Calo, A., et al. (2014) In Journal of Electron Spectroscopy and Related Phenomena 195. p.55-61
Abstract
Neutral Pb clusters in the size range from a few tens of atoms up to similar to 100 atoms are studied using synchrotron-based photoelectron spectroscopy. The electronic structure is seen to differ increasingly from that of the solid when the cluster size decreases. The valence band narrows gradually - down to about one fifth of the solid-state band width at the smallest size of few tens of atoms. Simultaneously the Fermi-edge energy shifts further away from the solid value by more than 2 eV. The Pb 5d core level binding energy also increases and the spectral features broaden and change in shape. The changes observed for the valence and for the 5d response energies and shapes are discussed in the context of the metal-to-insulator transition... (More)
Neutral Pb clusters in the size range from a few tens of atoms up to similar to 100 atoms are studied using synchrotron-based photoelectron spectroscopy. The electronic structure is seen to differ increasingly from that of the solid when the cluster size decreases. The valence band narrows gradually - down to about one fifth of the solid-state band width at the smallest size of few tens of atoms. Simultaneously the Fermi-edge energy shifts further away from the solid value by more than 2 eV. The Pb 5d core level binding energy also increases and the spectral features broaden and change in shape. The changes observed for the valence and for the 5d response energies and shapes are discussed in the context of the metal-to-insulator transition observed earlier in Pb clusters below the critical size of 20-30 atoms/cluster. (C) 2014 Elsevier B.V. All rights reserved. (Less)
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publication status
published
subject
keywords
Metal clusters, Photoelectron spectroscopy, Synchrotron radiation
in
Journal of Electron Spectroscopy and Related Phenomena
volume
195
pages
55 - 61
publisher
Elsevier
external identifiers
  • wos:000342872800008
  • scopus:84901878574
ISSN
0368-2048
DOI
10.1016/j.elspec.2014.05.011
language
English
LU publication?
yes
id
72e47cca-57c3-4ca0-8f61-50a4d11ea92f (old id 4800390)
date added to LUP
2014-12-01 09:32:54
date last changed
2017-10-01 04:24:14
@article{72e47cca-57c3-4ca0-8f61-50a4d11ea92f,
  abstract     = {Neutral Pb clusters in the size range from a few tens of atoms up to similar to 100 atoms are studied using synchrotron-based photoelectron spectroscopy. The electronic structure is seen to differ increasingly from that of the solid when the cluster size decreases. The valence band narrows gradually - down to about one fifth of the solid-state band width at the smallest size of few tens of atoms. Simultaneously the Fermi-edge energy shifts further away from the solid value by more than 2 eV. The Pb 5d core level binding energy also increases and the spectral features broaden and change in shape. The changes observed for the valence and for the 5d response energies and shapes are discussed in the context of the metal-to-insulator transition observed earlier in Pb clusters below the critical size of 20-30 atoms/cluster. (C) 2014 Elsevier B.V. All rights reserved.},
  author       = {Tchaplyguine, Maxim and Öhrwall, Gunnar and Andersson, T. and Svensson, S. and Bjorneholm, O. and Huttula, M. and Mikkela, M. and Urpelainen, Samuli and Osmekhin, S. and Calo, A. and Aksela, S. and Aksela, H.},
  issn         = {0368-2048},
  keyword      = {Metal clusters,Photoelectron spectroscopy,Synchrotron radiation},
  language     = {eng},
  pages        = {55--61},
  publisher    = {Elsevier},
  series       = {Journal of Electron Spectroscopy and Related Phenomena},
  title        = {Size-dependent evolution of electronic structure in neutral Pb clusters-As seen by synchrotron-based X-ray photoelectron spectroscopy},
  url          = {http://dx.doi.org/10.1016/j.elspec.2014.05.011},
  volume       = {195},
  year         = {2014},
}