Browsing by Author "Salamat, Ashkan"
Now showing items 1-4 of 4
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Evidence of a first-order phase transition to metallic hydrogen
Zaghoo, Mohamed; Salamat, Ashkan; Silvera, Isaac F. (American Physical Society (APS), 2016)The insulator-metal transition in hydrogen is one of the most outstanding problems in condensed matter physics. The high-pressure metallic phase is now predicted to be liquid atomic from T=0 K to very high temperatures. ... -
Identification of new pillared-layered carbon nitride materials at high pressure
Salamat, Ashkan; Deifallah, Malek; Cabrera, Raul Quesada; Corà, Furio; McMillan, Paul F. (Nature Publishing Group, 2013)The compression of the layered carbon nitride C6N9H3·HCl was studied experimentally and with density functional theory (DFT) methods. This material has a polytriazine imide structure with Cl− ions contained within C12N12 ... -
Strategies for in situ laser heating in the diamond anvil cell at an X-ray diffraction beamline
Petitgirard, Sylvain; Salamat, Ashkan; Beck, Pierre; Weck, Gunnar; Bouvier, Pierre (International Union of Crystallography, 2014)An overview of several innovations regarding in situ laser-heating techniques in the diamond anvil cell at the high-pressure beamline ID27 of the European Synchrotron Radiation Facility is presented. Pyrometry measurements ... -
Synthesis of Tetragonal and Orthorhombic Polymorphs of Hf3N4 by High-Pressure Annealing of a Prestructured Nanocrystalline Precursor
Salamat, Ashkan; Hector, Andrew L.; Gray, Benjamin M.; Kimber, Simon A. J.; Bouvier, Pierre; McMillan, Paul F. (American Chemical Society, 2013)Hf3N4 in nanocrystalline form is produced by solution phase reaction of Hf(NEtMe)4 with ammonia followed by low-temperature pyrolysis in ammonia. Understanding of phase behavior in these systems is important because early ...