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@ARTICLE{Lee:172057,
author = {Lee, Shu-Han and Lai, Yen-Chung and Du, Chao-Hung and Kao,
Ying-Jer and Siegenfeld, Alexander F. and Hatton, Peter D.
and Prabhakaran, D. and Su, Yixi and Huang, Di-Jing},
title = {{I}nverse {M}elting of an {E}lectronic {L}iquid {C}rystal},
reportid = {FZJ-2014-05606},
year = {2014},
note = {7 pages, 7 figures},
abstract = {Inverse melting refers to the rare thermodynamic phenomenon
in which a solid melts into a liquid upon cooling, a
transition that can occur only when the ordered (solid)
phase has more entropy than the disordered (liquid) phase,
and that has so far only been observed in a handful of
systems. Here we report the first experimental observation
for the inverse melting of an electronic liquid crystalline
order in strontium-doped lanthanum nickelate, a compound
isostructural with the superconducting cuprates, with a hole
doping concentration of 1/3. Using x-ray scattering, we
demonstrate that the isotropic charge modulation is driven
to nematic order by fluctuating spins and shows an inverse
melting transition. Using a phenomenological Landau theory,
we show that this inverse melting transition is due to the
interlayer coupling between the charge and spin orders. This
discovery points to the importance of the interlayer
correlations in the system, and provides a new perspective
to study the intricate nature of the electronic liquid
crystal phases in strongly correlated electronic systems,
including possibly the Cu- and Fe-based high-Tc
superconductors.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106},
pnm = {54G - JCNS (POF2-54G24) / 544 - In-house Research with PNI
(POF2-544) / 424 - Exploratory materials and phenomena
(POF2-424)},
pid = {G:(DE-HGF)POF2-54G24 / G:(DE-HGF)POF2-544 /
G:(DE-HGF)POF2-424},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)25},
eprint = {1410.6886},
howpublished = {arXiv:1410.6886},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1410.6886;\%\%$},
url = {https://juser.fz-juelich.de/record/172057},
}