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@ARTICLE{Filimonov:58706,
      author       = {Filimonov, S. and Cherepanov, V. and Hervieu, Y. and
                      Voigtländer, B.},
      title        = {{M}ultistage nucleation of two-dimensional {S}i islands on
                      {S}i(111)-7x7 during {MBE} growth: {STM} experiments and
                      extended rate-equation model},
      journal      = {Physical review / B},
      volume       = {76},
      number       = {3},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-58706},
      pages        = {035428},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The submonolayer density of two-dimensional (2D) islands in
                      Si/Si(111)-7x7 molecular beam epitaxy is measured using
                      scanning tunneling microscopy. At a relatively low
                      deposition temperature of 673 K, the density of 2D islands
                      is a power function of the deposition flux N-2D proportional
                      to F-chi with the exponent chi=0.24 being smaller than that
                      predicted by the standard nucleation theory. The nonstandard
                      scaling of the 2D island density is explained by the
                      multistage character of the nucleation process on the
                      Si(111)-7x7 surface which involves consecutive stages of
                      formation of stable Si clusters, formation of pairs of
                      clusters, and transformation of the cluster pairs to 2D
                      islands. Using an extended rate-equation model, we analyze
                      the temperature and growth rate dependencies of the density
                      of single clusters, cluster pairs, and 2D islands and show
                      that an activation barrier of similar to 1.26 eV delays the
                      transformation of cluster pairs to 2D islands. The delayed
                      transformation of cluster pairs to 2D islands is the reason
                      for the nonstandard scaling of the 2D island density
                      observed at low deposition temperatures.},
      keywords     = {J (WoSType)},
      cin          = {IBN-3 / CNI / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB801 / I:(DE-Juel1)VDB381 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000248500800148},
      doi          = {10.1103/PhysRevB.76.035428},
      url          = {https://juser.fz-juelich.de/record/58706},
}