Results 11 to 20 of about 3,084,963 (320)
Proceedings of the National Academy of Sciences, 2011 H 2 O will be more resistant to metallization than previously thought. From computational evolutionary structure searches, we find a sequence of new stable and meta-stable structures for the ground state of ice in the 1–5 TPa (10 to 50 Mbar) regime, in the static approximation.
Andreas Hermann +2 more
openaire +3 more sources
Phase transition mechanism and bandgap engineering of Sb2S3 at gigapascal pressures
Communications Chemistry, 2021 Antimonite (Sb2S3) has potential applications for solar energy, but how its layered structure changes under pressure is incompletely understood. Here diamond anvil cell experiments supported by first principles calculations offer a structural explanation
Zhongxun Cui +9 more
doaj +1 more source
Room-Temperature Synthesis of Tubular Hexagonal Boron Nitride under Pressure
Crystals, 2023 Hexagonal boron nitride (h-BN) exhibits interesting optical and mechanical properties, including chemical and thermal stability. Extensive techniques have been applied for the realization of h-BN at high temperatures.
Junkai Li +4 more
doaj +1 more source
Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor [PDF]
, 2023 We investigate the thermal expansion and superconducting properties of a CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform high-pressure synchrotron X-ray diffraction in a pressure range of 2.9 GPa < P < 10.4 GPa and discover that CoZr2 exhibits volumetric negative thermal expansion under high pressures.
arxiv +1 more source
High-pressure polymorphism in pyridine [PDF]
IUCrJ, 2020 Single crystals of the high-pressure phases II and III of pyridine have been obtained by in situ crystallization at 1.09 and 1.69 GPa, revealing the crystal structure of phase III for the first time using X-ray diffraction. Phase II crystallizes in P212121 with Z′ = 1 and phase III in P41212 with Z′ = ½.
Simon J. Teat +13 more
openaire +8 more sources
Crown rupture during droplet impact on a dry smooth surface at increased pressure [PDF]
Physics of Fluids 33, 122105 (2021), 2021 The impact of droplets at increased environmental pressure is important in many industrial applications. Previous studies mainly considered the impact process at standard or reduced environmental pressure, and the effect of high environmental pressure is unclear.
arxiv +1 more source
Enhancing reversibility of LiNi0.5Mn1.5O4 by regulating surface oxygen deficiency
Carbon Energy, 2023 Oxygen deficiency has crucial effects on the crystal structure and electrochemical performance of spinel oxide lithium electrode materials such as LiNi0.5Mn1.5O4 (LNMO) cathode.
Dandan Wang +8 more
doaj +1 more source
Some Magnetic Properties and Magnetocaloric Effects in the High-Temperature Antiferromagnet YbCoC2
Magnetochemistry, 2023 The YbCoC2 compound, which crystallizes in a base-centered orthorhombic unit cell in the Amm2 space group CeNiC2 structure, is unique among Yb-based compounds due to the highest magnetic ordering temperature of TN=27 K.
Denis Alexandrovich Salamatin +7 more
doaj +1 more source
Successive phase transitions under high pressure in FeTe0.92 [PDF]
J. Phys. Soc. Jpn. 78 (2009) 083709., 2009 We performed magnetization and electrical resistivity measurements under high pressures of up to 19 GPa for FeTe0.92. The compound shows an anomaly in magnetization and resistivity at atmospheric pressure due to a structural distortion accompanied by a magnetic transition.
arxiv +1 more source
Everything you always wanted to know about metallic hydrogen but were afraid to ask
Matter and Radiation at Extremes, 2020 The hydrogen molecule is made from the first and lightest element in the periodic table. When hydrogen gas is either compressed or cooled, it forms the simplest molecular solid. This solid exhibits many interesting and fundamental physical phenomena.
Eugene Gregoryanz +5 more
doaj +1 more source