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@ARTICLE{Mittal:15735,
      author       = {Mittal, R. and Zbiri, M. and Rols, S. and Su, Y. and Xiao,
                      Y. and Chaplot, S.L. and Schober, H. and Johnson, M. and
                      Chatterji, T. and Matsuishi, S. and Hosono, H. and Brückel,
                      T.},
      title        = {{P}honon {D}ynamics in {P}arent and {S}uperconducting
                      {F}e{A}s {C}ompounds},
      journal      = {Chinese journal of physics},
      volume       = {49},
      issn         = {0577-9073},
      address      = {Taipei},
      publisher    = {Physical Society of the Republic of China},
      reportid     = {PreJuSER-15735},
      pages        = {403 - 413},
      year         = {2011},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The comparison of the phonon spectra of the parent MFe2As2
                      (M = Ba, Ca, Sr) and MFeAsF (M = Ca, Sr) compounds show a
                      very strong renormalization in the lower and intermediate
                      frequency part of the vibrations. Mass effects and lattice
                      contraction cannot solely explain these changes. Further,
                      the measurement of temperature dependence of phonon density
                      of states across the magnetic/structural phase transition
                      temperature indicates that softening of low energy modes in
                      the paramagnetic state of these compounds may be due to the
                      interaction of phonons with electron or short-range spin
                      fluctuations in the normal state of the superconducting
                      compound as well as in the parent compound. Detailed lattice
                      dynamical calculations are carried out to analyze the
                      experimental data.},
      keywords     = {J (WoSType)},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / PGI-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien /
                      Großgeräte für die Forschung mit Photonen, Neutronen und
                      Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK412 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      shelfmark    = {Physics, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000286490100049},
      url          = {https://juser.fz-juelich.de/record/15735},
}