title: Symmetry breaking of ionic semiconductors under pressure: the case of InAs.
abstract: The NaCl-to-Cmcm phase transition and the Cmcm structure of InAs under high pressure are studied by x-ray diffraction. The lattice parameters and fractional coordinates are given as a function of pressure. We propose a mechanism responsible for this type of symmetry breaking under pressure. We show that the ppσ interactions do not play a major role in the stabilization of the NaCl structure. Consequently the NaCl-to-Cmcm transition occurs only in compounds with a large charge transfer. General conclusions on the behavior of III-V semiconductors under pressure are drawn.
authors.affiliation: Condensed Matter Physics Laboratory, University of Liège, B5, B-4000 Sart-Tilman, Belgium.
authors.forename: H
authors.initials: H
authors.lastname: Libotte
authors.forename: G
authors.initials: G
authors.lastname: Aquilanti
authors.forename: S
authors.initials: S
authors.lastname: Pascarelli
authors.forename: W A
authors.initials: WA
authors.lastname: Crichton
authors.forename: T
authors.initials: T
authors.lastname: Le Bihan
authors.forename: J P
authors.initials: JP
authors.lastname: Gaspard