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@ARTICLE{Zorn:9075,
      author       = {Zorn, R.},
      title        = {{T}he boson peak in confined disordered system},
      journal      = {Physical review / B},
      volume       = {81},
      number       = {5},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-9075},
      pages        = {054208},
      year         = {2010},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The vibrational density of states (VDOS) of disordered
                      systems shows a low-frequency excess, the so-called boson
                      peak. Experiments show a change in the shape of the boson
                      peak when the systems are spatially confined. Depending on
                      the type of confinement (hard or soft) the low-frequency
                      wing of the boson peak is either suppressed or enhanced.
                      Here, a simple model, a crystalline system with disordered
                      nearest-neighbor force constants, is studied with boundary
                      conditions mimicking the confinement. The VDOS calculated by
                      numerical diagonalization shows qualitatively the same
                      confinement effect as the experiment. In this model, the
                      effect is a consequence of modes of the bulk system being
                      shifted up or down for hard and soft confinement,
                      respectively. A simple rescaling procedure is suggested to
                      convert the VDOS of the bulk into that of the confined
                      system.},
      keywords     = {J (WoSType)},
      cin          = {IFF-5 / IFF-4 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB785 / I:(DE-Juel1)VDB784 /
                      I:(DE-Juel1)JCNS-20121112},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000274998000042},
      doi          = {10.1103/PhysRevB.81.054208},
      url          = {https://juser.fz-juelich.de/record/9075},
}