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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},
}