High-pressure phase transition in gallium phosphide: An x-ray-absorption spectroscopy study

J.P. Itié , A. Polian (1, 2, 3) , C Jauberthie-Carillon , E Dartyge , A Fontaine , H Tolentino , G Tourillon

1 CNRS - Centre National de la Recherche Scientifique
2 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
3 SU - Sorbonne Université

High-pressure behavior of GaP has been studied by x-ray-absorption spectroscopy in a diamondanvil cell up to 36 GPa. The room-temperature equation of state of phase I has been determined. The transition from a fourfold (zinc-blende) to a sixfold (P-tin) coordination scheme is observed near 26 GPa. Analysis of the data obtained on a sample quickly depressurized from 36 GPa shows that the transition is not reversible and the recovered sample is mainly amorphous.

Domaines: Physique [physics]

J.P. Itié, A. Polian, C Jauberthie-Carillon, E Dartyge, A Fontaine, et al.. High-pressure phase transition in gallium phosphide: An x-ray-absorption spectroscopy study. Physical Review B: Condensed Matter (1978-1997), 1989. ⟨hal-03059442⟩