High pressure and high temperature X-ray diffraction study of InAs

Abstract The bulk of high pressure experimental data available on A ( n ) B (8− n ) compounds refers to room temperature (RT) measurements. The P – T phase diagram remains therefore largely unexplored, whereas the few pioneering combined high pressure and temperature investigations are opening a new insight in the structural systematics of this class of compounds. The goal of this work was to investigate the role of temperature in the ZB→NaCl phase transition in the InAs compound, using energy dispersive X-ray diffraction measurements, and to explore its high pressure behaviour at high temperatures. Our data show that the RT structural sequence is preserved up to T =470 K but not at T ∼600 K.