Neutron scattering study of the pressure-induced phase transformation in ReO3

J. D. Axe, Y. Fujii, B. Batlogg, Martha Greenblatt, S. Di Gregorio

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

We have studied the pressure-induced phase transformation in a large single crystal of ReO3 at 300 K and (06)-kbar hydrostatic pressure. Inelastic measurements at 1 bar show a pronounced minimum in the T1 mode near the Brillouin-zone boundary (M point). Above Pc=5.2 kbar superlattice reflections with intensities consistent with M3-like rotations of ReO6 octahedra appear. The transformation seems to be continuous (second order), but an anomaly in the superlattice intensity at P=5.4 kbar suggests a further transformation. The M3 phonon softens dramatically as PPc from below, but no substantial changes occur in the long-wavelength acoustic velocities between 0 and 6 kbar.

Original languageEnglish (US)
Pages (from-to)663-667
Number of pages5
JournalPhysical Review B
Volume31
Issue number2
DOIs
StatePublished - Jan 1 1985

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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