Fragile 3D Order in V\(_{1-x}\)Mo\(_x\)O\(_2\)

The metal-to-insulator transition (MIT) in rutile VO\(_2\) has proven uniquely difficult to characterize because of the complex interplay between electron correlations and atomic structure. Here we report the discovery of the sudden collapse of three-dimensional order in the low-temperature phase of...

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Bibliographic Details
Published in:arXiv.org 2024-06
Main Authors: Davenport, Matthew A, Krogstad, Matthew J, Whitt, Logan M, Hu, Chaowei, Douglas, Tyra C, Ni, Ni, Rosenkranz, Stephan, Osborn, Raymond, Allred, Jared M
Format: Article
Language:English
Subjects:
Atomic properties
Atomic structure
Collapse
Correlation
Electronic properties
Electronic structure
Equivalence
Fragility
Planes
Rutile
Single crystals
Structural stability
Symmetry
X-ray scattering
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Summary:The metal-to-insulator transition (MIT) in rutile VO\(_2\) has proven uniquely difficult to characterize because of the complex interplay between electron correlations and atomic structure. Here we report the discovery of the sudden collapse of three-dimensional order in the low-temperature phase of V\(_{1-x}\)Mo\(_x\)O\(_2\) at \(x=0.17\) and the emergence of a novel frustrated two-dimensional order at \(x=0.19\), with only a slight change in electronic properties. Single crystal diffuse x-ray scattering reveals that this transition from the 3D M1 phase to a 2D variant of the M2 phase results in long-range structural correlations along symmetry-equivalent (11L) planes of the tetragonal rutile structure, yet extremely short-range correlations transverse to these planes. These findings suggest that this two-dimensionality results from a novel form of geometric frustration that is essentially structural in origin.
ISSN:2331-8422
DOI:10.48550/arxiv.1909.12704