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@ARTICLE{Lizzit:9505,
      author       = {Lizzit, S. and Zampieri, G. and Petaccia, L. and
                      Larciprete, R. and Lacovig, P. and Rienks, E. D. L. and
                      Bihlmayer, G. and Baraldi, A. and Hofmann, Ph.},
      title        = {{B}and dispersion in the deep 1s core level of graphene},
      journal      = {Nature physics},
      volume       = {6},
      issn         = {1745-2473},
      address      = {Basingstoke},
      publisher    = {Nature Publishing Group},
      reportid     = {PreJuSER-9505},
      pages        = {345 . 349},
      year         = {2010},
      note         = {We gratefully acknowledge stimulating discussions with D.
                      L. Mills, J. G. de Abajo and K. C. Prince. The research
                      leading to these results has received financial support from
                      the Danish National Research Council, the Lundbeck
                      Foundation and the European Community's Seventh Framework
                      Programme (FP7/2007-2013) under grant agreement no. 226716.
                      G.Z. thanks ANPCyT of Argentina and the ICTP Trieste for
                      financial support under the TRIL Programme.},
      abstract     = {It is generally assumed that electrons in deep atomic core
                      states are highly localized and do not participate in the
                      bonding of molecules and solids. This implies well-defined
                      core-level binding energies and the absence of any splitting
                      and band-like dispersion, a fact that is exploited in
                      several powerful experimental techniques, such as X-ray
                      photoemission spectroscopy. Violations of this assumption
                      have been found for only a few small molecules in the gas
                      phase such as C2H2 or N-2 with much stronger bonding and
                      shorter bonding distances than present in solids(1,2). Here
                      we report the observation of a sizeable band-like dispersion
                      of the C 1s core level in graphene, a single-layer honeycomb
                      net of carbon atoms that is attracting considerable
                      attention at present in the scientific community(3). The
                      dispersion is observed as an emission-angle-dependent
                      binding-energy modulation and it is shown that under
                      appropriate conditions only the bonding or antibonding
                      states can be observed. A very similar dispersion is also
                      found by ab initio calculations.},
      keywords     = {J (WoSType)},
      cin          = {IFF-1 / IAS-1 / JARA-FIT / JARA-SIM},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB781 / I:(DE-Juel1)IAS-1-20090406 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)VDB1045},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000278335500013},
      doi          = {10.1038/nphys1615},
      url          = {https://juser.fz-juelich.de/record/9505},
}