This article is cited in 7 papers

Lattice dynamics

Effect of pressure on phonon spectra and elastic properties of orthorhombic GeSe

F. M. Gashumzade^a, D. A. Guseinova^a, Z. A. Jahangirli^ab, B. G. Mehdiyev^a, G. S. Orudzhev<sup>ab

a</sup> Institute of Physics Azerbaijan Academy of Sciences
^b Azerbaijan Technical University, Baku

Abstract: The pressure dependences of the phonon frequencies of the Brillouin zone center and also the elastic constants of the GeSe compound have been calculated by the density functional theory method using the ABINIT program package. The results have been compared with the available data of theoretical calculations and measurements of the pressure dependences of the Raman frequency. The calculations have demonstrated that the compound undergoes a continuous phase transition from the simple orthorhombic to body-centered orthorhombic lattice at a pressure about 29 GPa.

Received: 02.08.2013
Accepted: 03.10.2013

 English version: Physics of the Solid State, 2014, 56:4, 761–764

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