GaS and InSe equations of state from single crystal diffraction

J. Pellicer-Porres (1) , E. Machado-Charry (2) , A. Segura (1) , S. Gilliland (1) , E. Canadell (2) , P. Ordejón (2) , A. Polian (3) , P. Munsch (3) , A. Chevy (3) , N. Guignot (4)

1 ICMUV - Institut Universitari de Ciencia dels Materials
2 ICMAB - Institut de Ciència de Materials de Barcelona
3 IMPMC - Institut de minéralogie et de physique des milieux condensés
4 ESRF - European Synchrotron Radiation Facility

We have performed single crystal angle dispersive X-ray diffraction at high pressure in order to investigate the GaS and InSe equations of state. We situate the transition from β-GaS to GaS-II at 27 03. ± . GPa. In the InSe experiment we locate the beginning of the phase transition at 7.6 ± 0.6 GPa. The equations of state of β-GaS ( 0 4327 006V= . ± . Å 3 , 37 2GPaB= ± , 52B= .¢ ), GaS-II ( 0 424 02V= . ± . Å 3 , 50 3GPaB= ± and 43 03B= . ± .¢ ) and γ-InSe ( 0 584 02V= . ± . Å 3 , 24 3GPaB= ± and 86 08B= . ± .¢ ) are discussed and compared with the results of an ab-initio calculation.

Domaines: Autre [cond-mat.other]

J. Pellicer-Porres, E. Machado-Charry, A. Segura, S. Gilliland, E. Canadell, et al.. GaS and InSe equations of state from single crystal diffraction. phys. stat. sol, 2007, 244, pp.169-173. ⟨10.1002/pssb.200672561⟩. ⟨hal-00173199⟩