2023
DOI: 10.26434/chemrxiv-2023-nr314
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Computational High-Pressure Chemistry: Ab Initio Simulations of Atoms, Molecules and Extended Materials in the Gigapascal Regime

Felix Zeller,
Chieh-Min Hsieh,
Wilke Dononelli
et al.

Abstract: The field of liquid-phase and solid-state high-pressure chemistry has exploded since the advent of the diamond anvil cell, an experimental technique that allows the application of pressures up to several hundred gigapascal. To complement high-pressure experiments, a large number of computational tools have been developed. These techniques enable the simulation of chemical systems, their sizes ranging from single atoms to infinitely large crystals, under high pressure and the calculation of the resulting struct… Show more

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“…The JEDI analysis requires electronic structure calculations of 1) the relaxed geometry of a chemical system, which is typically obtained by a standard geometry optimization, 2) the Hessian matrix in Cartesian coordinates, H x , at the relaxed reference geometry, and 3) a strained geometry. The latter can be obtained by quantum chemical methods that yield stretched 32 or compressed 70,71 geometries. The underlying electronic structure calculations are typically carried out using Density Functional Theory (DFT) 72,73 or wavefunction-based methods like Møller-Plesset Perturbation Theory 74 or the Coupled-Cluster approach.…”
Section: Theorymentioning
confidence: 99%
“…The JEDI analysis requires electronic structure calculations of 1) the relaxed geometry of a chemical system, which is typically obtained by a standard geometry optimization, 2) the Hessian matrix in Cartesian coordinates, H x , at the relaxed reference geometry, and 3) a strained geometry. The latter can be obtained by quantum chemical methods that yield stretched 32 or compressed 70,71 geometries. The underlying electronic structure calculations are typically carried out using Density Functional Theory (DFT) 72,73 or wavefunction-based methods like Møller-Plesset Perturbation Theory 74 or the Coupled-Cluster approach.…”
Section: Theorymentioning
confidence: 99%