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@ARTICLE{Portnichenko:283357,
author = {Portnichenko, P. Y. and Romhányi, J. and Onykiienko, Y. A.
and Henschel, A. and Schmidt, M. and Cameron, A. S. and
Surmach, M. A. and Lim, J. A. and Park, J. T. and
Schneidewind, A. and Abernathy, D. L. and Rosner, H. and van
den Brink, Jeroen and Inosov, D. S.},
title = {{M}agnon spectrum of the helimagnetic insulator
{C}u$_{2}${OS}e{O}$_{3}$},
journal = {Nature Communications},
volume = {7},
issn = {2041-1723},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2016-01780},
pages = {10725},
year = {2016},
abstract = {Complex low-temperature-ordered states in chiral magnets
are typically governed by acompetition between multiple
magnetic interactions. The chiral-lattice multiferroic
Cu2OSeO3became the first insulating helimagnetic material in
which a long-range order of topologicallystable spin
vortices known as skyrmions was established. Here we employ
state-of-the-artinelastic neutron scattering to comprehend
the full three-dimensional spin-excitation spectrumof
Cu2OSeO3 over a broad range of energies. Distinct types of
high- and low-energydispersive magnon modes separated by an
extensive energy gap are observed in excellentagreement with
the previously suggested microscopic theory based on a model
of entangledCu4 tetrahedra. The comparison of our neutron
spectroscopy data with model spin-dynamicalcalculations
based on these theoretical proposals enables an accurate
quantitative verificationof the fundamental magnetic
interactions in Cu2OSeO3 that are essential for
understandingits abundant low-temperature magnetically
ordered phases.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
ddc = {500},
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 / EXP:(DE-MLZ)PUMA-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000371036100003},
pubmed = {pmid:26911567},
doi = {10.1038/ncomms10725},
url = {https://juser.fz-juelich.de/record/283357},
}