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@ARTICLE{Buchenau:33392,
      author       = {Buchenau, U.},
      title        = {{M}echanical relaxation in glasses and the glass
                      transition},
      journal      = {Physical review / B},
      volume       = {63},
      number       = {10},
      issn         = {0163-1829},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PreJuSER-33392},
      pages        = {104203},
      year         = {2001},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The Gilroy-Phillips model of relaxational jumps in
                      asymmetric double-well potentials, developed for the
                      Arrhenius-type secondary relaxations of the glass phase, is
                      extended to a formal description of the breakdown of the
                      shear modulus at the glass transition, the alpha process.
                      The extension requires the introduction of two separate
                      parts of the barrier distribution function f(V), with a
                      different temperature behavior of primary and secondary
                      parts, respectively. The time-temperature scaling of the cu
                      process, together with a sum rule for the whole barrier
                      distribution function, implies a strong rise of the
                      integrated secondary relaxation with increasing temperature
                      above the glass transition. Thus one gets a quantitative
                      relation between the fragility of the glass former and the
                      fast rise of the picosecond process observed in neutron and
                      Raman scattering. The formalism is applied to literature
                      data of polystyrene, vitreous silica and a sodium silicate
                      glass. In the glass phase of polystyrene, one finds a
                      temperature-independent secondary barrier distribution
                      function, in agreement with an earlier Raman result from the
                      literature. Above the glass transition, the secondary
                      barrier distribution function increases with temperature as
                      predicted. The findings allow for an interpretation of the
                      fragility and the entropy crisis at the glass transition.},
      keywords     = {J (WoSType)},
      cin          = {IFF-NST},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB34},
      pnm          = {Kooperative Phänomene in kondensierter Materie},
      pid          = {G:(DE-Juel1)FUEK51},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000167402100034},
      doi          = {10.1103/PhysRevB.63.104203},
      url          = {https://juser.fz-juelich.de/record/33392},
}