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@ARTICLE{Guo:865387,
author = {Guo, H. and Li, Z. W. and Sakong, S. and Ryu, G. and Zhao,
L. and Piovano, A. and Schmidt, W. and Sprung, M. and
Strempfer, J. and Francoual, S. and Dzhigaev, D. and
Subakti, S. and Hu, Z. and Lin, H. J. and Chen, C. T. and
Luetkens, H. and Stockert, O. and Komarek, A. C.},
title = {{S}uppression of the outwards-dispersing branches in
hour-glass magnetic spectra induced by nanoscale phase
separation in {L}a 2 − x {S}r x {C}o{O} 4},
journal = {Physical review / B},
volume = {100},
number = {1},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2019-04872},
pages = {014411},
year = {2019},
abstract = {Here, we reinvestigate the underlying charge and magnetic
correlations in La2−xSrxCoO4 within a combined study of
muon spin relaxation (μSR), x-ray photon correlation
spectroscopy, synchrotron radiation single-crystal x-ray
diffraction, and neutron-scattering measurements. For
La2−xSrxCoO4 around 1/3 hole-doping, the significant
charge correlations that are responsible for the emergence
of hour-glass magnetic spectra are found to be slowly
fluctuating checkerboard charge ordering (CBCO) correlations
with an onset temperature being independent of hole-doping.
This reveals a local origin of the CBCO correlations in the
rather ionic cobaltates, thus being distinct from the more
covalent nickelates. Moreover, we report the observation of
a very similar temperature dependence of the intensities of
in-plane high- and low-energy excitations within the
La2−xSrxCoO4 hour-glass spectrum. This observation shows
that nano phase separation is distinct from conventional
phase separation and that there is a coupling between
nanometer-sized undoped and hole-doped islands. Based on
this, it is possible to propose a microscopic scenario for
the suppression of the outwards-dispersing branches in
hour-glass magnetic spectra.},
cin = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6212 - Quantum
Condensed Matter: Magnetism, Superconductivity (POF3-621) /
6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-Juel1)ILL-IN12-20150421},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000474877800002},
doi = {10.1103/PhysRevB.100.014411},
url = {https://juser.fz-juelich.de/record/865387},
}