Journal Article

PUBDB-2024-07497

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spectroscopic signatures and origin of hidden order in Ba$_2$MgReO$_6$

Soh, J. R. (Corresponding author)Extern* ; Merkel, M. E. ; Pourovskii, L. V. ; Zivkovic, I. ; Malanyuk, O. ; Pasztorova, J. ; Francoual, S.DESY* ; Hirai, D. ; Urru, A. ; Tolj, D. ; Fiore Mosca, D. ; Yazyev, O. V. ; Spaldin, N. ; Ederer, C. ; Rønnow, H. M.

2024
Nature Publishing Group UK [London]

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Please use a persistent id in citations: doi:10.1038/s41467-024-53893-z  doi:10.3204/PUBDB-2024-07497

Abstract: 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$_2$MgReO$_6$. 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$_q$ ~ 33 K. Using a variety of complementary first-principles-based computational techniques, we demonstrate that, while electronic interactions drive the ordering at T$_q$, 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.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)
2. PETRA-S (FS-PETRA-S)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20211583 EC (I-20211583-EC) (I-20211583-EC)
4. HERO - Hidden, entangled and resonating orders (810451) (810451)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)

Appears in the scientific report 2024

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