TY  - JOUR
AU  - Soh, Jian Rui
AU  - Merkel, Maximilian E.
AU  - Pourovskii, Leonid V.
AU  - Zivkovic, Ivica
AU  - Malanyuk, Oleg
AU  - Pasztorova, Jana
AU  - Francoual, Sonia
AU  - Hirai, Daigorou
AU  - Urru, Andrea
AU  - Tolj, Davor
AU  - Fiore Mosca, Dario
AU  - Yazyev, Oleg V.
AU  - Spaldin, Nicola
AU  - Ederer, Claude
AU  - Rønnow, Henrik M.
TI  - Spectroscopic signatures and origin of hidden order in Ba<sub>2</sub>MgReO<sub>6</sub>
JO  - Nature Communications
VL  - 15
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Nature Publishing Group UK
M1  - PUBDB-2024-07497
SP  - 10383
PY  - 2024
AB  - Clarifying the underlying mechanisms that govern ordering transitions in condensed matter systems is crucial for comprehending emergent properties and phenomena. While transitions are often classified as electronically driven or lattice-driven, we present a departure from this conventional picture in the case of the double perovskite Ba<sub>2</sub>MgReO<sub>6</sub>. Leveraging resonant and non-resonant elastic x-ray scattering techniques, we unveil the simultaneous ordering of structural distortions and charge quadrupoles at a critical temperature of T<sub>q</sub>   33 K. Using a variety of complementary first-principles-based computational techniques, we demonstrate that, while electronic interactions drive the ordering at T<sub>q</sub>, it is ultimately the lattice distortions that dictate the specific ground state that emerges. Our findings highlight the crucial interplay between electronic and lattice degrees of freedom, providing a unified framework to understand and predict unconventional emergent phenomena in quantum materials. 
LB  - PUB:(DE-HGF)16
C6  - 39613737
UR  - <Go to ISI:>//WOS:001367893700015
DO  - DOI:10.1038/s41467-024-53893-z
UR  - https://bib-pubdb1.desy.de/record/619239
ER  -