Results 21 to 30 of about 7,192,600 (302)

The near-room-temperature upsurge of electrical resistivity in Lu-H-N is not superconductivity, but a metal-to-poor-conductor transition

Matter and Radiation at Extremes, 2023
The recent report of superconductivity in nitrogen-doped lutetium hydride (Lu-H-N) at 294 K and 1 GPa brought hope for long-sought-after ambient-condition superconductors.
Di Peng, Qiaoshi Zeng, Fujun Lan, Zhenfang Xing, Yang Ding, Ho-kwang Mao   +5 more
doaj   +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, Cong Gao, Xuefeng Zhou, Shang Peng, Mingxue Tang, Yonggang Wang, Lujun Huang, Wenge Yang, Xiang Gao   +8 more
doaj   +1 more source

Hexagonal B–C–N composite consisting of h-BN and graphite separated by B–C nanolayer [PDF]

Matter and Radiation at Extremes
Graphite and hexagonal boron nitride (h-BN), despite their structural similarity, exhibit opposing electronic properties, namely, metallic conductivity and wide-bandgap insulation, respectively.
Baoyin Xu, Xiaohong Yuan, Bingtao Feng, Yifeng Jiang, Yaqi She, Zhanhui Ding, Yue Pan, Shucheng Liu, Kuo Hu, Zhaodong Liu, Quanjun Li, Bingbing Liu, Hu Tang   +12 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, Vladimir Nikolaevich Krasnorussky, Mariya Viktorovna Magnitskaya, Alexei Valeryevich Semeno, Alexander Vladimirovich Bokov, Atanas Velichkov, Zbigniew Surowiec, Anatoly Vasilyevich Tsvyashchenko   +7 more
doaj   +1 more source

High frequency pressure oscillator for microcryocoolers [PDF]

, 2008
Microminiature pulse tube cryocoolers should operate at a frequency of an order higher than the conventional macro ones because the pulse tube cryocooler operating frequency scales inversely with the square of the pulse tube diameter.
H. J. Holland, H. J. M. ter Brake, H. V. Jansen, J. F. Burger, Jhabvala M., Lerou P. P. P. M., M. C. Elwenspoek, Marquardt E. D., Radebaugh R., S. Vanapalli, Timoshenko S. P., Y. Zhao   +11 more
core   +2 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, Kejun Bu, Yukai Zhuang, Mary-Ellen Donnelly, Dongzhou Zhang, Philip Dalladay-Simpson, Ross T. Howie, Jiandong Zhang, Xujie Lü, Qingyang Hu   +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, Donghan Jia, Guoliang Niu, Peiyang Mu, Huiyang Gou   +4 more
doaj   +1 more source

High-Pressure Amorphous Nitrogen

, 2001
The phase diagram and stability limits of diatomic solid nitrogen have been explored in a wide pressure--temperature range by several optical spectroscopic techniques.
A. F. Goncharov, A. Goncharov, A. K. McMahan, Alexander F. Goncharov, C. Mailhiot, D. A. Young, Eugene Gregoryanz, F. Urbach, H. Olijnyk, Ho-kwang Mao, J. Badro, J. Tauc, L. J. Pilione, M. H. Brodski, M. I. Eremets, N. F. Mott, P. M. Bell, P. Richet, R. Bini, R. Bini, R. J. Hemley, R. Jeanloz, R. M. Martin, R. Reichlin, Russell J. Hemley, S. Knief, S. M. Sharma, T. W. Barbee III, Y. Fei, Y. K. Vohra, Y. K. Vohra   +30 more
core   +1 more source

High-pressure melting curve of hydrogen [PDF]

, 2008
The melting curve of hydrogen was computed for pressures up to 200 GPa, using molecular dynamics. The inter- and intramolecular interactions were described by the reactive force field (ReaxFF) model.
Belonoshko, Anatoly B., Davis, Sergio M., Johansson, Börje, Skorodumova, Natalia V., van Duin, Adri C. T.   +4 more
core   +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, Cheng Ji, Philip Dalladay-Simpson, Bing Li, Ross T. Howie, Ho-Kwang Mao   +5 more
doaj   +1 more source