Experimental and modelling evidence for structural crossover in supercritical CO₂

Article


Cockrell, C. J., Dicks, O., Wang, L., Trachenko, K., Soper, A. K., Brazhkin, V. V. and Marinakis, S. 2020. Experimental and modelling evidence for structural crossover in supercritical CO₂. Physical Review E. 101 (Art. 052109). https://doi.org/10.1103/PhysRevE.101.052109
AuthorsCockrell, C. J., Dicks, O., Wang, L., Trachenko, K., Soper, A. K., Brazhkin, V. V. and Marinakis, S.
Abstract

Physics of supercritical state is understood to a much lesser degree compared to subcritical liquids. Carbon dioxide in particular has been intensely studied, yet little is known about the supercritical part of its phase diagram. Here, we combine neutron scattering experiments and molecular dynamics simulations and demonstrate the structural crossover at the Frenkel line. The crossover is seen at pressures as high as 14 times the critical pressure and is evidenced by changes of the main features of the structure factor and pair distribution functions.

JournalPhysical Review E
Journal citation101 (Art. 052109)
ISSN2470-0053
Year2020
PublisherAmerican Physical Society
Accepted author manuscript
License
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Anyone
Digital Object Identifier (DOI)https://doi.org/10.1103/PhysRevE.101.052109
Web address (URL)https://doi.org/10.1103/PhysRevE.101.052109
Publication dates
Online12 May 2020
Publication process dates
Accepted08 Apr 2020
Deposited16 Apr 2020
Copyright holder© 2020 American Physical Society. All rights reserved.
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