High-pressure Raman-scattering study of germanium diselenide

 
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1998 (EN)

High-pressure Raman-scattering study of germanium diselenide (EN)

Popovic, ZV (EN)
Jaksic, Z (EN)
Raptis, YS (EN)
Anastassakis, E (EN)

We have measured the Raman-scattering spectra of the β modification of GeSe2 at low temperatures and under hydrostatic pressures up to 8 GPa at room temperature. A total of 28 modes of symmetry Ag and 29 of symmetry Bg were resolved by polarized light-scattering measurements at 10 K. The mode frequencies harden with pressure up to 2.5 GPa. At 6.2 GPa the changes of the spectra reveal a transition to an amorphous phase. Further increase of the pressure up to 7 GPa yields strong indication of a phase transition from the disordered phase to the low-temperature modification of GeSe2. At 8 GPa, this modification transforms back to the disordered phase. All these phase transformations are reversible. (EN)

journalArticle (EN)

High Pressure (EN)
Raman Scattering (EN)


Physical Review B - Condensed Matter and Materials Physics (EN)

1998 (EN)

57 (EN)
10.1103/PhysRevB.57.3418 (EN)
6 (EN)
3422 (EN)
01631829 (EN)
3418 (EN)




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