Structural, vibrational, and electronic properties of BaReH9 under pressure

Eugene A. Vinitsky; Takaki Muramatsu; Maddury Somayazulu; Wilson K. Wanene; Zhenxian Liu; Dhanesh Chandra; Russell J. Hemley

doi:10.1088/0953-8984/28/50/505701

Structural, vibrational, and electronic properties of BaReH₉ under pressure

Eugene A. Vinitsky, Takaki Muramatsu, Maddury Somayazulu, Wilson K. Wanene, Zhenxian Liu, Dhanesh Chandra, Russell J. Hemley

Civil and Urban Engineering

Research output: Contribution to journal › Article › 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 language	English (US)
Article number	505701
Journal	Journal of Physics Condensed Matter
Volume	28
Issue number	50
DOIs	https://doi.org/10.1088/0953-8984/28/50/505701
State	Published - Oct 28 2016

Keywords

hydride superconductors
hydrogen-rich compounds
pressure-induced disorder

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1088/0953-8984/28/50/505701

Cite this

@article{b17a038646aa46b7aa9efd57c824d837,

title = "Structural, vibrational, and electronic properties of BaReH9 under 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 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.",

keywords = "hydride superconductors, hydrogen-rich compounds, pressure-induced disorder",

author = "Vinitsky, {Eugene A.} and Takaki Muramatsu and Maddury Somayazulu and Wanene, {Wilson K.} and Zhenxian Liu and Dhanesh Chandra and Hemley, {Russell J.}",

note = "Funding Information: The Advanced Photon Source is a DOE, Office of Science User Facility operated by Argonne National Laboratory under Contract DE-AC02-06CH11357. Work at LLNL was performed under the auspices of the U.S. DOE under Contract No. DE-AC52-07NA27344. The U2A beamline was supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences, under NSF Cooperative Agreement Grant No. EAR01-35554 and the US. DOE/ NNSA (CDAC). Publisher Copyright: {\textcopyright} 2016 IOP Publishing Ltd.",

year = "2016",

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doi = "10.1088/0953-8984/28/50/505701",

language = "English (US)",

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T1 - Structural, vibrational, and electronic properties of BaReH9 under pressure

AU - Vinitsky, Eugene A.

AU - Muramatsu, Takaki

AU - Somayazulu, Maddury

AU - Wanene, Wilson K.

AU - Liu, Zhenxian

AU - Chandra, Dhanesh

AU - Hemley, Russell J.

N1 - Funding Information: The Advanced Photon Source is a DOE, Office of Science User Facility operated by Argonne National Laboratory under Contract DE-AC02-06CH11357. Work at LLNL was performed under the auspices of the U.S. DOE under Contract No. DE-AC52-07NA27344. The U2A beamline was supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences, under NSF Cooperative Agreement Grant No. EAR01-35554 and the US. DOE/ NNSA (CDAC). Publisher Copyright: © 2016 IOP Publishing Ltd.

PY - 2016/10/28

Y1 - 2016/10/28

N2 - 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.

AB - 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.

KW - hydride superconductors

KW - hydrogen-rich compounds

KW - pressure-induced disorder

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