Structure and electronic properties of BaH2 at high pressure

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DOIResolve DOI: http://doi.org/10.1016/j.ssc.2009.07.044
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TypeArticle
Journal titleSolid State Communications
Volume149
Issue43-44
Pages19441946; # of pages: 3
SubjectA. Superconductors; C. x-ray scattering; D. Electron–phonon interaction; E. High pressure
AbstractThe structure of BaH2 at high pressure up to 58 GPa has been investigated with synchrotron powder x-ray diffraction. A structural phase transition from the low pressure Ni2In structure to a simple hexagonal structure, which started at 40 GPa and was completed at approximately 45 GPa, was confirmed. A loss of Raman signal in this pressure range suggests that an insulator to metal transition has occurred. This observation is corroborated with first-principles calculations. The investigation of the electron–phonon coupling shows that the metallic phase is a very weak superconductor with an estimated superconducting critical temperature Tc in the range of mK.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NPARC number16709332
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Record identifierf1e1c680-67dc-4021-af2f-51707b12de30
Record created2011-02-15
Record modified2016-05-09
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