Maqola

Comparative structural evolution under pressure of powder and single crystals of the layered antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>FePS</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:math>

David M. JarvisCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United KingdomMatthew CoakCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United KingdomH. HamidovCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United KingdomCharles R. S. HainesCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United KingdomGiulio LamprontiDepartment of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, United KingdomCheng LiuCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United KingdomShiyu DengCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United KingdomDominik DaisenbergerDiamond Light Source, Chilton, Didcot OX11 0DE, United KingdomDavid R. AllanDiamond Light Source, Chilton, Didcot OX11 0DE, United KingdomMark R. WarrenDiamond Light Source, Chilton, Didcot OX11 0DE, United KingdomAndrew WildesInstitut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble, FranceSiddharth SaxenaCavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom

Physical review. B./Physical review. Bjournal2023lv

ABI

Annotatsiya

${\mathrm{FePS}}_{3}$ is a layered magnetic van der Waals compound that undergoes a Mott insulator-metal transition under applied pressure. The transition has an associated change in the crystal symmetry and magnetic structure. Understanding the underlying physics of these transitions requires a detailed understanding of the crystal structure as a function of pressure. Two conflicting models have previously been proposed for the evolution of the structure with pressure. To settle the disagreement, we present a study of the pressure-dependent crystal structures using both single-crystal and powder x-ray diffraction measurements. We show unambiguously that the highest-pressure transition involves a collapse of the interplanar spacing, along with an increase in symmetry from a monoclinic to a trigonal space group, to the exclusion of other models. Our collected results are crucial for understanding high-pressure behavior in these materials and demonstrate a clear and complete methodology for exploring complex two-dimensional material structures under pressure.

Mavzular

High-pressure geophysics and materials Inorganic Fluorides and Related Compounds Advanced Condensed Matter Physics

Identifikatorlar

DOI: 10.1103/physrevb.107.054106

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