Anomalous structural phase transition properties in ReSe 2 and Au-doped ReSe 2

Yu Cheng Kao, Tony Huang, Der Yuh Lin, Ying Sheng Huang, Kwong Kau Tiong, Hsin Yi Lee, Jhih Min Lin, Hwo Shuenn Sheu, Chih Ming Lin

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11 Citations (Scopus)


The high pressure induced phase transition in rhenium diselenides (ReSe 2) and gold-doped rhenium diselenides (Au-ReSe 2) at ambient temperature have been investigated using angular-dispersive x-ray diffraction (ADXRD) under high pressure up to around 10.50 and 9.98 GPa, respectively. In situ ADXRD measurements found that the phase transition pressures of ReSe 2 and Au-ReSe 2 began at 9.98 and 8.52 GPa, respectively. Compressibilities analysis shows the relationship of along c-axis > along a-axis > along b-axis. The linear compressibility of the pressure dependence of α, β, and γ of ReSe 2 shows that a phase transition can be related to a counterclockwise rotational trend of the selenium atoms around the chain of Re 4 atoms during the decrease of the c-axis distance by a combination of stresses due to the bending effect of α and stretching effect of β. The cause of the reduction of the phase transition pressure of Au-ReSe 2 is attributed mainly to a structural distortion as evidenced by the observation of a weak clockwise rotational trend of Se atoms around the chain of Re 4 atoms in the pressure range 3.99-4.99 GPa which subsequently reversed to counterclockwise rotation under higher pressure.

Original languageEnglish
Article number024509
JournalJournal of Chemical Physics
Issue number2
Publication statusPublished - 2012 Jul 14

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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