Journal articles
Experimental Evidence for a High-Pressure Isostructural Phase Transition in Osmium
Abstract : We have measured the isothermal equation of state (EOS) of osmium to 75 GPa under hydrostatic conditions at room temperature using angle-dispersive x-ray diffraction. A least-squares fit of this data using a third-order Birch-Murnaghan EOS yields an isothermal bulk modulus K 0 411 6 GPa, showing osmium is more compressible than diamond. Most importantly, we have documented an anomaly in the compressibility around 25 GPa associated with a discontinuity in the first pressure derivative of the c=a ratio. This discontinuity plausibly arises from the collapse of the small hole-ellipsoid in the Fermi surface near the L point.
Cited literature [14 references]
https://hal-insu.archives-ouvertes.fr/insu-01387809
Contributor : Eva Fareau <>
Submitted on : Wednesday, October 26, 2016 - 10:46:15 AM
Last modification on : Friday, March 27, 2020 - 2:59:31 AM
Contributor : Eva Fareau <>
Submitted on : Wednesday, October 26, 2016 - 10:46:15 AM
Last modification on : Friday, March 27, 2020 - 2:59:31 AM
File
PhysRevLett.93.095502.pdf
Publisher files allowed on an open archive