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

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    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
    Volume235
    Issue number2
    DOIs
    Publication statusPublished - Feb 1 2003

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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