4.7 Article

Pressure suppression of charge order without metallisation in Cs2Au2I6

Journal

CHEMICAL COMMUNICATIONS
Volume 46, Issue 36, Pages 6681-6683

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c0cc01708f

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Funding

  1. EPSRC
  2. STFC
  3. EastCHEM
  4. Leverhulme Trust
  5. EPSRC [EP/E06471X/1] Funding Source: UKRI
  6. Engineering and Physical Sciences Research Council [EP/E06471X/1] Funding Source: researchfish

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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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