Structural studies of bulk amorphous GaSb under high pressures

A. V. Sapelkin*, S. C. Bayliss, A. G. Lyapin, V. V. Brazhkin, J. P. Itié, A. Polian, S. M. Clark, A. J. Dent

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

In-situ high pressure (up to 20 GPa) energy-dispersive EXAFS as well as energy-and angle-dispersive powder diffraction have been used to study phase transformations in bulk amorphous GaSb and (GaSb)1-x(Ge2)x. Complex transitional behavior was observed. The amorphous-to-high pressure crystalline GaSb II phase transition starts at a pressure of ≈4 GPa, whereas the analogous transition in crystalline GaSb takes place at around 7 GPa. The abnormally large Debye-Waller factor for Ga nearest neighbors in the high pressure phase is interpreted in terms of the existence of an orthorhombic structure. In the solid solutions of GaSb with Ge the transition pressure shifts to higher values with increasing Ge concentration x.

Original languageEnglish
Pages (from-to)503-508
Number of pages6
JournalPhysica Status Solidi B: Basic Solid State Physics
Volume198
Issue number1
Publication statusPublished - Nov 1996
Externally publishedYes

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