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On the transition from gas-like to liquid-like behaviour in supercritical N2

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https://arxiv.org/abs/1909.12745
Original languageEnglish
Pages (from-to)6584-6589
Number of pages6
JournalThe Journal of Physical Chemistry Letters
Volume10
Issue number21
Early online date11 Oct 2019
DOIs
Publication statusPublished - 7 Nov 2019

Abstract

We have studied in detail the transition from gas-like to rigid liquid-like behavior in supercritical N2 at 300 K (2.4 TC). Our study combines neutron diffraction and Raman spectroscopy with ab initio molecular dynamics simulations. We observe a narrow transition from gas-like to rigid liquid-like behavior at ca. 150 MPa, which we associate with the Frenkel line. Our findings allow us to reliably characterize the Frenkel line using both diffraction and spectroscopy methods, backed up by simulation, for the same substance. We clearly lay out what parameters change, and what parameters do not change, when the Frenkel line is crossed.

    Research areas

  • cond-mat.mtrl-sci, cond-mat.other

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