High-pressure Brillouin scattering of amorphous BeH 2

Muhtar Ahart, Jeffery Yarger, Kristina M. Lantzky, Satoshi Nakano, Ho Kwang Mao, Russell J. Hemley

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24 Scopus citations

Abstract

High-pressure micro-Brillouin scattering is employed to investigate the pressure dependence of the sound velocity, refractive index, equation of state, and mechanical properties of amorphous BeH 2. The refractive index n has been determined by using two scattering geometries (70° and 180°). The equation of state is deduced from the pressure dependences of the sound velocity. The bulk modulus is 14.2 (±3.0) GPa and its pressure derivative is 5.3 (±0.5). The polarizability is calculated from the refractive index and the density of the material. It increases with pressure while Poisson's ratio decreases with pressure.

Original languageEnglish (US)
Article number014502
JournalJournal of Chemical Physics
Volume124
Issue number1
DOIs
StatePublished - Apr 10 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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    Ahart, M., Yarger, J., Lantzky, K. M., Nakano, S., Mao, H. K., & Hemley, R. J. (2006). High-pressure Brillouin scattering of amorphous BeH 2 Journal of Chemical Physics, 124(1), [014502]. https://doi.org/10.1063/1.2138692