Dima Bolmatov

Dr. Dima Bolmatov

Physics & Astronomy, Texas Tech University, Lubbock, Texas, USA
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orcid

Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 May 2012 in Scientific Reports
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Journal Article
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Dima BolmatovDima Bolmatov
Dima Bolmatov
VBV. V. Brazhkin
V. V. Brazhkin
KTK. Trachenko
K. Trachenko
Heat capacity of matter is considered to be its most important property because it holds information about system's degrees of freedom as well as the regime in which the system operates, classical or quantum. Heat capacity is well understood in gases and solids but not in the third main state of matter, liquids, and is not discussed in physics textbooks as a result. The perceived difficulty is that interactions in a liquid are both strong and system-specific, implying that the energy strongly depends on the liquid type and that, therefore, liquid energy can not be calculated in general form. Here, we develop a phonon theory of liquids where this problem is avoided. The theory covers both classical and quantum regimes. We demonstrate good agreement of calculated and experimental heat capacity of 21 liquids, including noble, metallic, molecular and hydrogen-bonded network liquids in a wide range of temperature and pressure.

16 August 2013 in Nature Communications
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Dima BolmatovDima Bolmatov
Dima Bolmatov
VBV. V. Brazhkin
V. V. Brazhkin
KTK. Trachenko
K. Trachenko

5 November 2015 in Scientific Reports
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Journal Article
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Dima BolmatovDima Bolmatov
Dima Bolmatov
MZMikhail Zhernenkov
Mikhail Zhernenkov
DZDmitry Zav’yAlov
Dmitry Zav’yAlov
STSergey N. Tkachev
Sergey N. Tkachev
ACAlessandro Cunsolo
Alessandro Cunsolo
YCYong Cai
Yong Cai
Supercritical fluids play a significant role in elucidating fundamental aspects of liquid matter under extreme conditions. They have been extensively studied at pressures and temperatures relevant to various industrial applications. However, much less is known about the structural behaviour of supercritical fluids and no structural crossovers have been observed in static compression experiments in any temperature and pressure ranges beyond the critical point. The structure of supercritical state is currently perceived to be uniform everywhere on the pressure-temperature phase diagram and to change only in a monotonic way even moving around the critical point, not only along isotherms or isobars. Conversely, we observe structural crossovers for the first time in a deeply supercritical sample through diffraction measurements in a diamond anvil cell and discover a new thermodynamic boundary on the pressure-temperature diagram. We explain the existence of these crossovers in the framework of the phonon theory of liquids using molecular dynamics simulations. The obtained results are of prime importance since they imply a global reconsideration of the mere essence of the supercritical phase. Furthermore, this discovery may pave the way to new unexpected applications and to the exploration of exotic behaviour of confined fluids relevant to geo- and planetary sciences.

1 December 2015 in Annals of Physics
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Dima BolmatovDima Bolmatov
Dima Bolmatov
DZDmitry Zav’yAlov
Dmitry Zav’yAlov
MZMikhail Zhernenkov
Mikhail Zhernenkov
EMEdvard Musaev
Edvard Musaev
YCYong Cai
Yong Cai

12 May 2016 in Nature Communications
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MZMikhail Zhernenkov
Mikhail Zhernenkov
Dima BolmatovDima Bolmatov
Dima Bolmatov
DSDmytro Soloviov
Dmytro Soloviov
KZKirill Zhernenkov
Kirill Zhernenkov
BTBoris Toperverg
Boris Toperverg
YCYong Cai
Yong Cai
The passive transport of molecules through a cell membrane relies on thermal motions of the lipids. However, the nature of transmembrane transport and the precise mechanism remain elusive and call for a comprehensive study of phonon excitations. Here we report a high resolution inelastic X-ray scattering study of the in-plane phonon excitations in 1,2-dipalmitoyl-sn-glycero-3-phosphocholine above and below the main transition temperature. In the gel phase, for the first time, we observe low-frequency transverse modes, which exhibit a phonon gap when the lipid transitions into the fluid phase. We argue that the phonon gap signifies the formation of short-lived nanometre-scale lipid clusters and transient pores, which facilitate the passive molecular transport across the bilayer plane. Our findings suggest that the phononic motion of the hydrocarbon tails provides an effective mechanism of passive transport, and illustrate the importance of the collective dynamics of biomembranes.

22 July 2015 in The Journal of Physical Chemistry Letters
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Journal Article
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Dima BolmatovDima Bolmatov
Dima Bolmatov
MZMikhail Zhernenkov
Mikhail Zhernenkov
DZDmitry Zav’yAlov
Dmitry Zav’yAlov
SSStanislav Stoupin
Stanislav Stoupin
YCYong Cai
Yong Cai
Alessandro CunsoloAlessandro Cunsolo
Alessandro Cunsolo