Pressure suppression of charge order without metallisation in Cs2Au2I6

Anna F. Kusmartseva; Minghui Yang; Angel M. Arevalo-Lopez; Konstantin V. Kamenev; J. Paul Attfield

doi:10.1039/C0CC01708F

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Pressure suppression of charge order without metallisation in Cs₂Au₂I₆†

Anna F. Kusmartseva,^a Minghui Yang,^a Angel M. Arevalo-Lopez,^a Konstantin V. Kamenev^b and J. Paul Attfield*^a

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* Corresponding authors

^a Centre for Science at Extreme Conditions (CSEC) and School of Chemistry, University of Edinburgh, Edinburgh, UK
E-mail: j.p.attfield@ed.ac.uk
Fax: +44 (0)131 651 7049
Tel: +44 (0)131 650 6753

^b CSEC and School of Engineering, University of Edinburgh, UK

Abstract

Resistivity and powder X-ray diffraction measurements on Cs₂Au₂I₆ up to 320 kbar pressure show that the suppression of Au⁺/Au³⁺ charge order above 55 kbar results in a non-metallic phase containing localised Au²⁺ states that is irreversibly amorphised above 120 kbar, and a gradual metallisation observed above 175 kbar may result from decomposition within the amorphous material.

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Supplementary files

Tables of crystal structure parameters and derived bond distances for Cs ₂Au ₂I ₆ at several pressures PDF (259K)

Article information

DOI: https://doi.org/10.1039/C0CC01708F
Article type: Communication
Submitted: 02 Jun 2010
Accepted: 30 Jul 2010
First published: 23 Aug 2010

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Chem. Commun., 2010,46, 6681-6683

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Pressure suppression of charge order without metallisation in Cs₂Au₂I₆

A. F. Kusmartseva, M. Yang, A. M. Arevalo-Lopez, K. V. Kamenev and J. P. Attfield, Chem. Commun., 2010, 46, 6681 DOI: 10.1039/C0CC01708F

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