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Electronic origin of negative thermal expansion in V2OPO4

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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.

Graphical abstract: Electronic origin of negative thermal expansion in V2OPO4

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Article information


Submitted
13 Mar 2020
Accepted
30 Apr 2020
First published
30 Apr 2020

This article is Open Access

Chem. Commun., 2020, Advance Article
Article type
Communication

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, Advance Article , DOI: 10.1039/D0CC01920H

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