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Uranium polyhydrides at moderate pressures: prediction, synthesis, and expected superconductivity
Ivan A. Kruglov, Alexander G. Kvashnin, Alexander F. Goncharov +7
Hydrogen-rich hydrides attract great attention due to recent theoretical (1) and then experimental discovery of record high-temperature superconductivity in H3S (Tc = 203 K at 155…
Superconductivity in SrB3C3 clathrate
Li Zhu, Hanyu Liu, Maddury Somayazulu +12
We predict superconductivity for the carbon-boron clathrate SrB3C3 at 27-43 K for Coulomb pseudopotential (mu*) values between 0.17 and 0.10 using first-principles calculations wit…
Synthesis of Xenon and Iron/Nickel intermetallic compounds at Earth's core thermodynamic conditions
Elissaios Stavrou, Yansun Yao, Alexander F. Goncharov +5
Although Xe is known to form stable compounds with strong electronegative elements, evidence on the formation of stable compounds with electropositive elements, such as Fe and Ni,…
Raman spectroscopy and X-ray diffraction of sp3-CaCO3 at lower mantle pressures
Sergey S. Lobanov, Xiao Dong, Naira S. Martirosyan +8
The exceptional ability of carbon to form sp2 and sp3 bonding states leads to a great structural and chemical diversity of carbon-bearing phases at non-ambient conditions. Here we…
First non-icosahedral boron allotrope synthesized at high pressure and high temperature
Irina Chuvashova, Elena Bykova, Maxim Bykov +5
Theoretical predictions of pressure-induced phase transformations often become long-standing enigmas because of limitations of contemporary available experimental possibilities. Hi…
Stable high-pressure phases in the H-S system determined by chemically reacting hydrogen and sulfur
Alexander F. Goncharov, Sergey S. Lobanov, Vitali B. Prakapenka +1
Synchrotron X-ray diffraction and Raman spectroscopy have been used to study chemical reactions of molecular hydrogen (H2) with sulfur (S) at high pressures. We find theoretically…
Experimental evidence for pressure-induced first order transition in cerium nitride from B1 to B10 structure type
Morten B. Nielsen, Davide Ceresoli, Jens-Erik Jørgensen +3
The crystal structure of CeN was investigated up to pressures of 82 GPa, using diamond anvil cell powder X-ray diffraction in two experiments with He and Si-oil as the pressure tra…