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

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

Raman scattering in *e-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 G...

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Bibliographic Details
Published in:Physica Status Solidi (b) Vol. 235; no. 2; pp. 517 - 520
Main Authors: Kulibekov, A M, Olijnyk, H P, Jephcoat, A P, Salaeva, Z Y, Onari, S, Allakhverdiev, K R
Format: Journal Article
Language:English
Published: 01-02-2003
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Summary:Raman scattering in *e-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 pressurized crystal was observed. The transition under pressure was found to be irreversible at room temperature. It was shown that the pressurized form of *e-GaSe at ambient conditions most probably belongs to the *g-type as characterized by an increased intensity of the Raman modes at 234 cm-1 and 250 cm-1.
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ISSN:0370-1972