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@ARTICLE{Bera:204893,
      author       = {Bera, A. K. and Lake, B. and Islam, A. T. M. N. and
                      Schneidewind, A.},
      title        = {{C}ritical properties of coupled anisotropic {H}aldane spin
                      chains in a magnetic field},
      journal      = {Physical review / B},
      volume       = {92},
      number       = {6},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2015-05485},
      pages        = {060412},
      year         = {2015},
      abstract     = {We use inelastic neutron scattering to measure magnetic
                      fluctuations as a function of transverse magneticfield and
                      temperature in a single crystal of the coupled Haldane chain
                      compound SrNi2V2O8 with uniaxialanisotropy. At the base
                      temperature (2 K), spin excitations confirm a field-induced
                      quantum phase transitionfrom the disordered Haldane (gapped
                      singlet) state to a gapped long-range ordered state through
                      a quantumcritical point (QCP) (μ0Hc ≈ 11.5 T). At
                      elevated temperatures in the vicinity of the QCP, both the
                      energy andlinewidth of the lowest triplet mode scale
                      linearly with temperature, in accordance with quantum
                      criticality. Wealso demonstrate that the experimental field
                      dependence of the triplet excitation modes at the base
                      temperatureis in agreement with the bosonic and macroscopic
                      models, but is in contrast to the fermionic and
                      perturbativemodels.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)PANDA-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000362207500002},
      doi          = {10.1103/PhysRevB.92.060412},
      url          = {https://juser.fz-juelich.de/record/204893},
}