Structural, vibrational, and electronic properties of BaReH9 under pressure

Eugene Vinitsky, Takaki Muramatsu, Maddury Somayazulu, Wilson  Wanene, Zhenxian Liu, Dhanesh Chandra, Russell Hemley

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

We present a study of the high-pressure behavior of BaReH9, a novel hydrogen-rich compound, using optical, Raman, and infrared spectroscopy as well as synchrotron x-ray diffraction. The x-ray diffraction measurements demonstrate that BaReH9 retains its hexagonal structure on room temperature compression up to 40 GPa. Optical absorption shows the absence of a gap closure to 80 GPa. Raman and IR spectra reveal the pressure evolution of a newly observed phonon peak, and large peak broadening with increasing pressure. These data constrain the disorder present in the material following the P-T paths explored.
Original languageEnglish
Article number505701
Number of pages7
JournalJournal of Physics Condensed Matter
Volume28
Issue number50
Early online date28 Oct 2016
DOIs
Publication statusPublished - 21 Dec 2016

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