Erosion of Refractory Carbides in High‐Temperature Hydrogen from Ab Initio Computations

2021 ◽  
Author(s):  
William C. Tucker ◽  
Charles W. Bauschlicher ◽  
Lauren J. Abbott ◽  
Dean Cheikh ◽  
Michael Preudhomme ◽  
...  
Keyword(s):  
High Temperature ◽  
Ab Initio ◽  
Ab Initio Computations

The conformation of ethyleneurea from microwave spectroscopy and ab initio computations

1988 ◽  
Vol 189 (1-2) ◽  
pp. 81-88 ◽  
Author(s):  
R. Cervellati ◽  
A. Degli Esposti ◽  
D.G. Lister ◽  
P. Palmieri
Keyword(s):  
Ab Initio ◽  
Microwave Spectroscopy ◽  
Ab Initio Computations

Magnetic anisotropy on demand exploiting high-pressure as remote control: an ab initio proof-of-concept

2021 ◽  
Author(s):  
Matteo Briganti ◽  
Federico Totti
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Remote Control ◽  
Magnetic Anisotropy ◽  
Ab Initio ◽  
Single Molecule ◽  
Boiling Temperature ◽  
Proof Of Concept ◽  
Single Molecule Magnets ◽  
On Demand

Lanthanide based single molecule magnets have recently become very promising systems for creating single molecule device working at high temperature (nitrogen boiling temperature). However, the variation of direction of the...

scholarly journals Study of High-Temperature Behaviour of ZnO by Ab Initio Molecular Dynamics Simulations and X-ray Absorption Spectroscopy

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5206
Author(s):  
Dmitry Bocharov ◽  
Inga Pudza ◽  
Konstantin Klementiev ◽  
Matthias Krack ◽  
Alexei Kuzmin
Keyword(s):  
Molecular Dynamics ◽  
High Temperature ◽  
Ab Initio ◽  
Ab Initio Molecular Dynamics ◽  
Mean Square ◽  
Structural Anisotropy ◽  
X Ray ◽  
Temperature Dependences ◽  
Dynamics Simulations ◽  
X Ray Absorption

Wurtzite-type zinc oxide (w-ZnO) is a widely used material with a pronounced structural anisotropy along the c axis, which affects its lattice dynamics and represents a difficulty for its accurate description using classical models of interatomic interactions. In this study, ab initio molecular dynamics (AIMD) was employed to simulate a bulk w-ZnO phase in the NpT ensemble in the high-temperature range from 300 K to 1200 K. The results of the simulations were validated by comparison with the experimental Zn K-edge extended X-ray absorption fine structure (EXAFS) spectra and known diffraction data. AIMD NpT simulations reproduced well the thermal expansion of the lattice, and the pronounced anharmonicity of Zn–O bonding was observed above 600 K. The values of mean-square relative displacements and mean-square displacements for Zn–O and Zn–Zn atom pairs were obtained as a function of interatomic distance and temperature. They were used to calculate the characteristic Einstein temperatures. The temperature dependences of the O–Zn–O and Zn–O–Zn bond angle distributions were also determined.

scholarly journals Microwave Spectrum, Dipole Moment, Planarity and Stability of syn-Oxalyl Fluoride. Ab Initio Computations of the anti--syn Equilibrium of Oxalyl Fluoride.

1995 ◽  
Vol 49 ◽  
pp. 172-181 ◽  
Author(s):  
K.-M. Marstokk ◽  
Harald Møllendal ◽  
Sture Nordholm ◽  
Per Halfdan Nielsen ◽  
Alf Claesson ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Ab Initio ◽  
Microwave Spectrum ◽  
Ab Initio Computations

Phase relations in the Fe-P system at high pressures and temperatures from ab initio computations

2020 ◽  
Vol 40 (2) ◽  
pp. 235-244 ◽  
Author(s):  
Nursultan E. Sagatov ◽  
Pavel N. Gavryushkin ◽  
Maksim V. Banayev ◽  
Talgat M. Inerbaev ◽  
Konstantin D. Litasov
Keyword(s):  
Ab Initio ◽  
High Pressures ◽  
Phase Relations ◽  
P System ◽  
High Pressures And Temperatures ◽  
Ab Initio Computations
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