Electronic origin of negative thermal expansion in V2OPO4

Elise Pachoud; James Cumby; Jon Wright; Branimir Raguž; Robert Glaum; J. Paul Attfield

doi:10.1039/D0CC01920H

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Electronic origin of negative thermal expansion in V₂OPO₄†

Elise Pachoud,^a James Cumby,^a Jon Wright,^b Branimir Raguž,^c Robert Glaum^c and J. Paul Attfield

*^a

Author affiliations

* Corresponding authors

^a Centre for Science at Extreme Conditions & School of Chemistry, University of Edinburgh, UK
E-mail: j.p.attfield@ed.ac.uk

^b European Synchrotron Radiation Facility, Grenoble, France

^c Institut für Anorganische Chemie, Universität Bonn, Germany

Abstract

Negative volume expansion between 620 and 800 K in V₂OPO₄ is discovered to be of electronic origin due to the charge ordering transition at 605 K. Domain reorientation and coexistence of the low and high temperature phases close to the transition are observed in X-ray diffraction data from single crystals grown by chemical vapour transport.

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Article information

DOI: https://doi.org/10.1039/D0CC01920H
Article type: Communication
Submitted: 13 Mar 2020
Accepted: 30 Apr 2020
First published: 30 Apr 2020
This article is Open Access

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Chem. Commun., 2020,56, 6523-6526

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Electronic origin of negative thermal expansion in V₂OPO₄

E. Pachoud, J. Cumby, J. Wright, B. Raguž, R. Glaum and J. P. Attfield, Chem. Commun., 2020, 56, 6523 DOI: 10.1039/D0CC01920H

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