title: Structural, vibrational, and electronic properties of BaReH9under pressure.
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 BaReH9retains 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.
authors: Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA.
authors: Eugene A
authors: EA
authors: Vinitsky
authors: Takaki
authors: T
authors: Muramatsu
authors: Maddury
authors: M
authors: Somayazulu
authors: Wilson K
authors: WK
authors: Wanene
authors: Zhenxian
authors: Z
authors: Liu
authors: Dhanesh
authors: D
authors: Chandra
authors: Russell J
authors: RJ
authors: Hemley