Thermally triggered phononic gaps in liquids at THz scale

Scientific Reports
Dima BolmatovYong Q Cai

Abstract

In this paper we present inelastic X-ray scattering experiments in a diamond anvil cell and molecular dynamic simulations to investigate the behavior of phononic excitations in liquid Ar. The spectra calculated using molecular dynamics were found to be in a good agreement with the experimental data. Furthermore, we observe that, upon temperature increases, a low-frequency transverse phononic gap emerges while high-frequency propagating modes become evanescent at the THz scale. The effect of strong localization of a longitudinal phononic mode in the supercritical phase is observed for the first time. The evidence for the high-frequency transverse phononic gap due to the transition from an oscillatory to a ballistic dynamic regimes of motion is presented and supported by molecular dynamics simulations. This transition takes place across the Frenkel line thermodynamic limit which demarcates compressed liquid and non-compressed fluid domains on the phase diagram and is supported by calculations within the Green-Kubo phenomenological formalism. These results are crucial to advance the development of novel terahertz thermal devices, phononic lenses, mirrors, and other THz metamaterials.

References

Jun 4, 2011·Physical Review Letters·T StillN Stefanou
May 29, 2012·Scientific Reports·D BolmatovK Trachenko
Jan 3, 2013·The Review of Scientific Instruments·I KantorL Dubrovinsky
Aug 21, 2013·Nature Communications·Dima BolmatovK Trachenko
Oct 1, 2013·Scientific Reports·Dima BolmatovK Trachenko
Nov 2, 2013·Nature Communications·William E UspalPatrick S Doyle
Nov 5, 2013·Physical Review Letters·Dirk SchneiderGeorge Fytas
Nov 15, 2013·Nature·Martin Maldovan
Dec 24, 2013·The Journal of Chemical Physics·Dima BolmatovK Trachenko
Apr 4, 2015·Physical Review Letters·Zhaoju YangBaile Zhang
Apr 24, 2015·Nature Communications·Fang LuOleg Gang
Aug 13, 2015·The Journal of Physical Chemistry Letters·Dima BolmatovAlessandro Cunsolo
Aug 19, 2015·The Journal of Physical Chemistry Letters·Dima BolmatovMikhail Zhernenkov
Sep 24, 2015·Nature Communications·E Alonso-RedondoG Fytas
Nov 6, 2015·Scientific Reports·Dima BolmatovYong Q Cai

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Citations

May 27, 2017·Nano Letters·Dima BolmatovAlessandro Cunsolo
Jun 10, 2017·Physical Review Letters·C YangK Trachenko
Feb 20, 2020·Proceedings of the National Academy of Sciences of the United States of America·Dmytro SoloviovMikhail Zhernenkov
Sep 28, 2020·Chemistry and Physics of Lipids·Dima BolmatovMaxim O Lavrentovich
Jul 23, 2018·Biochimica Et Biophysica Acta. Biomembranes·Dima BolmatovMikhail Zhernenkov
Jul 8, 2021·The Journal of Physical Chemistry Letters·Ian H BellGuillaume Galliero
Jul 20, 2018·The Journal of Physical Chemistry Letters·Giovanna D'AngeloAlessandro Paciaroni
Jul 10, 2019·The Journal of Physical Chemistry. B·Elizabeth A Ploetz, Paul E Smith
May 1, 2018·The Journal of Physical Chemistry Letters·Dima BolmatovJohn Katsaras
Apr 8, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Dima BolmatovJohn Katsaras

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Methods Mentioned

BETA
X-ray
x-ray scattering

Software Mentioned

LAMMPS

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