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@ARTICLE{Tam:864386,
author = {Tam, David W. and Lai, Hsin-Hua and Hu, Jin and Lu, Xingye
and Walker, H. C. and Abernathy, D. L. and Niedziela, J. L.
and Weber, Tobias and Enderle, M. and Su, Yixi and Mao, Z.
Q. and Si, Qimiao and Dai, Pengcheng},
title = {{P}laquette instability competing with bicollinear ground
state in detwinned {F}e{T}e},
journal = {Physical review / B},
volume = {100},
number = {5},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2019-04178},
pages = {054405},
year = {2019},
abstract = {We use inelastic neutron scattering to show that long-range
spin waves arising from the static bicollinear
antiferromagnetic (AF) order in FeTe, which have twofold
rotational symmetry in a fully detwinned crystal, rapidly
dissolve above E≈26meV into ridges of scattering with
fourfold rotational symmetry and a nearly isotropic magnetic
fluctuation spectrum. With increasing temperature above
TN≈68K, the twofold spin waves change into broad regions
of scattering with fourfold symmetry. Since the scattering
patterns from plaquette magnetic order generated within a
bilinear biquadratic Hamiltonian have fourfold rotational
symmetry consistent with the high-energy, spin-isotropic
spin waves of FeTe, we conclude that the bicollinear AF
state in FeTe is quasidegenerate with plaquette magnetic
order, providing evidence of the strongly frustrated nature
of the local moments in the iron chalcogenide family of
iron-based superconductors.},
cin = {JCNS-FRM-II},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {524 - Controlling Collective States (POF3-524) / 6212 -
Quantum Condensed Matter: Magnetism, Superconductivity
(POF3-621) / 6G4 - Jülich Centre for Neutron Research
(JCNS) (POF3-623) / 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000478991000002},
doi = {10.1103/PhysRevB.100.054405},
url = {https://juser.fz-juelich.de/record/864386},
}