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Synthesis, structure and electric conductivity of higher hydrides of ytterbium at high pressure
Tomasz Jaronn, Jianjun Ying, Marek Tkacz +4
While most of the rare earth metals readily form trihydrides, due to increased stability of the filled 4f electronic shell for Yb(II), only YbH, formally corresponding to…
Phase transitions and amorphization of M2AgF4 (M = Na, K, Rb) compounds at high pressure
Jakub Gawraczynski, Łukasz Wolanski, Adam Grzelak +3
We report the results of Raman spectroscopy high-pressure studies of alkali metal fluoroargentates (M2AgF4, where M=Na, K, Rb) associated with theoretical and x-ray diffraction stu…
Evidence for superconductivity above 260 K in lanthanum superhydride at megabar pressures
Maddury Somayazulu, Muhtar Ahart, Ajay K Mishra +5
Recent predictions and experimental observations of high Tc superconductivity in hydrogen-rich materials at very high pressures are driving the search for superconductivity in the…
Unusual pressure-induced periodic lattice distortion in SnSe
Jianjun Ying, Hari Paudyal, Christoph Heil +3
We performed high pressure x-ray diffraction (XRD), Raman, and transport measurements combined with first-principles calculations to investigate the behavior of tin diselenide (SnS…
Comment on Observation of the Wigner-Huntington transition to metallic hydrogen
Alexander F. Goncharov, Viktor V. Struzhkin
A recent paper of Dias and Silvera (DS) reports on production of metallic hydrogen in a diamond anvil cell at 495 GPa at 5.5 and 83 K. The results are implied to have a great impac…
Modulation calorimetry in diamond anvil cells II: Joule-heating design and prototypes
Zachary M. Geballe, Viktor V. Struzhkin, Andrew Townley +1
Part I shows that quantitative measurements of heat capacity are theoretically possible inside diamond anvil cells via high-frequency Joule heating (100 kHz to 10 MHz), opening up…