220 citations · 1.2k across the 24 of their papers we have counts for
14 papers · 1 filter
The raman signal of a hindered rotor
Peter I. C. Cooke, Ioan B. Magdǎu, Miriam Peña-Alvarez +6
We present a method for calculation of Raman modes of the quantum solid phase I solid hydrogen and deuterium. We use the mean-field assumption that the quantised excitations are lo…
On the Reactivity of Hydrogen-Helium and Hydrogen-Nitrogen at High Pressures
Robin Turnbull, Mary-Ellen Donnelly, Mengnan Wang +6
Through a series of Raman spectroscopy studies, we investigate the behaviour of hydrogen-helium and hydrogen-nitrogen mixtures at high pressure across wide ranging concentrations.…
Structure and metallicity of phase V of hydrogen
Bartomeu Monserrat, Neil D. Drummond, Philip Dalladay-Simpson +5
A new phase V of hydrogen was recently claimed in experiments above 325 GPa and 300 K. Due to the extremely small sample size at such record pressures the measurements were limited…
Comment on "Observation of the Wigner-Huntington transition to metallic hydrogen"
Xiao-Di Liu, Philip Dalladay-Simpson, Ross T. Howie +2
Dias and Silvera (Letters, p. 715, 2017) claim the observation of the Wigner-Huntington transition to metallic hydrogen at 495 GPa. We show that neither the claims of the record pr…
Hexagonal structure of phase III of solid hydrogen
Bartomeu Monserrat, Richard J. Needs, Eugene Gregoryanz +1
A hexagonal structure of solid molecular hydrogen with symmetry is calculated to be more stable below about 200 GPa than the monoclinic structure identified previou…
Poisson's ratio in cryocrystals under pressure
Yu. A. Freiman, Alexei Grechnev, S. M. Tretyak +2
We present results of lattice dynamics calculations of Poisson's ratio (PR) for solid hydrogen and rare gas solids (He, Ne, Ar, Kr and Xe) under pressure. Using two complementary a…