Raman scattering under pressure and the phase transition in ε-GaSe

A. M. Kulibekov, H. P. Olijnyk, A. P. Jephcoat, Z. Y. Salaeva, S. Onari, K. R. Allakhverdiev

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14 Citations (Scopus)


Raman scattering in ε-GaSe has been investigated at room temperature in a diamond anvil cell by using helium gas as a pressure transmitting medium. The first observation of the solid-solid phase transition under pressure from a hexagonal structure at ambient pressure to a NaCl-type at around 29.2 GPa is reported. A photoinduced change in the pressurised crystal was observed. The transition under pressure was found to be irreversible at room temperature. It was shown that the pressurised form of ε-GaSe at ambient conditions most probably belongs to the γ-type as characterised by an increased intensity of the Raman modes at 234 cm-1 and 250 cm-1.

Original languageEnglish
Pages (from-to)517-520
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Issue number2
Publication statusPublished - Feb 1 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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