Zobrazeno 1 - 10
of 511
pro vyhledávání: '"Dove M"'
Publikováno v:
J. Phys.: Condens. Matter 31, 225401 (2019)
A hallmark of a thermodynamic phase transition is the qualitative change of system thermodynamic properties such as energy and heat capacity. On the other hand, no phase transition is thought to operate in the supercritical state of matter and, for t
Externí odkaz:
http://arxiv.org/abs/1902.07710
Publikováno v:
Scientific Reports 9, 755 (2019)
Physical properties of an interacting system are governed by collective excitations, but their nature at extreme supercritical conditions is unknown. Here, we present direct evidence for propagating solid-like longitudinal phonon-like excitations wit
Externí odkaz:
http://arxiv.org/abs/1901.10052
Publikováno v:
Physical Review E 96, 012107 (2017)
We study thermo-mechanical properties of matter at extreme conditions deep in the supercritical state, at temperatures exceeding the critical one up to four orders of magnitude. We calculate the Gr\"{u}neisen parameter {\gamma} and find that it decre
Externí odkaz:
http://arxiv.org/abs/1707.02143
The existence of the phonon-roton minimum has been widely observed for both the solid and liquid phases but so far there is no sufficient theoretical explanation of its origin. In this paper we use a range of techniques to study the dynamics and shor
Externí odkaz:
http://arxiv.org/abs/1706.06553
Publikováno v:
Physical Review Letters 118, 215502 (2017)
Fundamental understanding of strongly-interacting systems necessarily involves collective modes, but their nature and evolution is not generally understood in dynamically disordered and strongly-interacting systems such as liquids and supercritical f
Externí odkaz:
http://arxiv.org/abs/1706.00836
Publikováno v:
Phys. Rev. E 95, 032116 (2017)
We develop an approach to liquid thermodynamics based on collective modes. We perform extensive molecular dynamics simulations of noble, molecular and metallic liquids and provide the direct evidence that liquid energy and specific heat are well-desc
Externí odkaz:
http://arxiv.org/abs/1702.07221
Autor:
Yang, C., Zarkadoula, E., Dove, M. T., Todorov, I. T., Geisler, T., Brazhkin, V. V., Trachenko, K.
Publikováno v:
J. Appl. Phys. 116, 184901 (2014)
We discuss how structural disorder and amorphization affects solid-state diffusion, and consider zirconolite as a currently important case study. By performing extensive molecular dynamics simulations, we disentangle the effects of amorphization and
Externí odkaz:
http://arxiv.org/abs/1502.07912
Publikováno v:
Phys. Rev. E 91 (2015), 012112
A new dynamic line, the Frenkel line, has recently been proposed to separate the supercritical state into rigid-liquid and non-rigid gas-like uid. The location of Frenkel line on the phase diagram is unknown for real uids. Here, we map the Frenkel li
Externí odkaz:
http://arxiv.org/abs/1502.07910
Autor:
Widdicombe, A. T., Ravindrarajah, P., Sapelkin, A., Phillips, A. E., Dunstan, D., Dove, M. T., Brazhkin, V. V., Trachenko, K.
Publikováno v:
Physics Education 49(4), 406 (2014)
Slow flow of the viscous liquid is a thought-provoking experiment that challenges students, academics and public to think about some fundamental questions in modern science. In the Queensland demonstration, the world-longest running experiment earnin
Externí odkaz:
http://arxiv.org/abs/1403.5442
Autor:
Andritsos, E. I., Zarkadoula, E., Phillips, A. E., Dove, M. T., Walker, C. J., Brazhkin, V. V., Trachenko, K.
Publikováno v:
J. Phys.: Cond. Matt 25, 235401 (2013)
We propose a new simple way to evaluate the effect of anharmonicity on a system's thermodynamic functions such as heat capacity. In this approach, the contribution of all potentially complicated anharmonic effects to constant-volume heat capacity is
Externí odkaz:
http://arxiv.org/abs/1302.3477