86 citations · 240 across the 13 of their papers we have counts for
13 papers
Quantum Reorientational Excitations in the Raman Spectrum of Hydrogen
Philip Dalladay-Simpson, Eric Edmund, Huixin Hu +2
Low-frequency Raman peaks, below 250 cm-1, are observed in hydrogen between 2-174 GPa and 13-300 K. The origin of these features is attributed to reorientational transitions (Delta…
Raman fingerprint of high-temperature superconductivity in compressed hydrides
Philip Dalladay-Simpson, Guglielmo Marchese, Zi-Yu Cao +5
The discovery of high-temperature superconductivity in hydrogen-rich compounds under extreme pressures has prompted great excitement, intense research, but also debate over the pas…
Narrowing band gap chemically and physically: Conductive dense hydrocarbon
Takeshi Nakagawa, Caoshun Zhang, Kejun Bu +14
Band gap energy of an organic molecule can be reduced by intermolecular interaction enhancement, and thus, certain polycyclic aromatic hydrocarbons (PAHs), which are insulators wit…
Unveiling a Novel Metal-to-Metal Transition in LuH2: Critically Challenging Superconductivity Claims in Lutetium Hydrides
Dong Wang, Ningning Wang, Caoshun Zhang +15
Following the recent report by Dasenbrock-Gammon et al. (2023) of near-ambient superconductivity in nitrogen-doped lutetium trihydride (LuH3-δNε), significant debate has emerged su…
Probing superconducting gap in CeH under pressure
Zi-Yu Cao, Seokmin Choi, Liu-Cheng Chen +11
The recent discovery of superconductivity in hydrogen-rich compounds has garnered significant experimental and theoretical interest because of the record-setting critical temperatu…
Synthesis of Superconducting Phase of LaCeH at High Pressures
Ge Huang, Tao Luo, Philip Dalladay-Simpson +7
Clathrate hydride \emph{Fm}\={3}\emph{m}-LaH has been proven as the most extraordinary superconductor with the critical temperature above 250 K upon compression of hun…
Synthesis and Superconductivity in Yttrium-Cerium Hydrides at Moderate Pressures
Liu-Cheng Chen, Tao Luo, Philip Dalladay-Simpson +7
Inspired by the high critical temperature in yttrium superhydride and the low stabilized pressure in superconducting cerium superhydride, we carry out four independent runs to synt…
High-Pressure Structural Evolution of Disordered Polymeric CS
Jinwey Yan, Ondrej Tóth, Wan Xu +8
Carbon disulfide, CS, is an archetypal double-bonded molecular system belonging to the rich class of group IV-group VI, AB compounds. It is widely and since long time belie…
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…
Molecular and polymeric amorphous forms in dense SO
Huichao Zhang, Ondrej Tóth, Xiao-Di Liu +7
We report here a study of reversible pressure-induced structural transformation between two amorphous forms of SO: molecular at pressures below 26 GPa and polymeric above this…
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…