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Frustrated charge order and cooperative distortions in ScV6 Sn6

Cornell Affiliated Author(s)

Author

G. Pokharel
B.R. Ortiz
L. Kautzsch
S.J. Gomez
K. Mallayya
G. Wu
E.-A. Kim
J.P.C. Ruff
S. Sarker
S.D. Wilson

Abstract

Here we study the stability of charge order in the kagome metal ScV6Sn6. Synchrotron x-ray diffraction measurements reveal high-temperature, short-range charge correlations at the wave vectors along q=(13,13,12) whose interlayer correlation lengths diverge upon cooling. At the charge order transition, this divergence is interrupted, and long-range order freezes in along q=(13,13,13), as previously reported, while disorder enables the charge correlations to persist at the q=(13,13,12) wave vector down to the lowest temperatures measured. Both short-range and long-range charge correlations seemingly arise from the same instability and both are rapidly quenched upon the introduction of larger Y ions onto the Sc sites. Our results validate the theoretical prediction of the primary lattice instability at q=(13,13,12), and we present a heuristic picture for viewing the frustration of charge order in this compound. © 2023 American Physical Society.

Date Published

Journal

Physical Review Materials

Volume

7

Issue

10

ISBN Number

24759953 (ISSN)

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174205260&doi=10.1103%2fPhysRevMaterials.7.104201&partnerID=40&md5=b2260d0820bc386968d01240e570a3e6

DOI

10.1103/PhysRevMaterials.7.104201

Alternate Journal

Physic. Rev. Mat.

Group (Lab)

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