Brazhkin, Vadim Veniaminovich

Vadim Veniaminovich Brazhkin was born on October 24, 1961 in the city of Zlatoust , in 1978 he entered the Faculty of Physics and Energy Problems of the Moscow Institute of Physics and Technology . After graduation, he entered the graduate school of the Moscow Institute of Physics and Technology. In 1987, he defended his thesis, after which he began work at the Institute of High Pressure Physics, USSR Academy of Sciences . In 1996 he defended his doctoral dissertation. Since 1993, he served as deputy director of the Institute of High Pressure Physics, Russian Academy of Sciences. Since 2016 - Director of the Institute of High Pressure Physics, Russian Academy of Sciences. In 2011, he was elected a corresponding member of the RAS. In 2016, he was elected an academician of the Russian Academy of Sciences; A. G. Stoletova ( 2017 ).

VV Brazhkin discovered and studied a new phenomenon - phase transformations in melts of elementary substances and simple compounds under pressure. It has been established that the transformations are accompanied by sharp changes in the structure and properties of the liquid, and insulator-metal transitions are realized in a number of substances. Under the guidance of V.V. Brazhkin, a series of fundamental works on the study of sharp and diffuse structural transformations in glasses and amorphous solids was also performed. The logarithmic kinetics of such transformations was first discovered. For a number of non-glass-forming molecular compounds (AsS, P4Se3, P4S3) glasses were first obtained from quenching from a melt at high pressures.

In studying the phenomenon of solid-phase amorphization of crystals under pressure, V.V. Brazhkin first obtained bulk phases of amorphous tetrahedral semiconductors. It has been experimentally established that the cause of solid-phase amorphization is a decrease in the shear moduli of the corresponding crystal lattices.

VV Brazhkin completed a large cycle of work on the effect of high pressure on the viscosity of liquids. It has been established that the viscosity of many liquid oxides and chalcogenides undergoing phase transformations sharply decreases upon compression by several orders of magnitude. V.V. Brazhkin showed that most molecular compounds based on light elements are thermodynamically metastable phases. At high pressures, these substances undergo irreversible transformations into polymerized states. Investigations of transformations in liquids and glasses by V.V. Beginning in 1986, Brazhkin actually led to the creation of a new direction in condensed matter physics. V.V. Brazhkin was the co-chair of the first major international meeting (2001) on phase transformations in disordered media. http://www.hppi.troitsk.ru/meetings/Nato/nato.htm In recent years, the field of research of V.V. Brazhkina shifted toward studying the structure and dynamics of supercritical fluids. V.V. Brazhkin and colleagues obtained vivid results on theoretical and experimental study of fluids. It has been established that an analogue of the liquid-gas line, from the point of view of the excitation spectrum in fluids, exists at arbitrarily high pressures. These results showed the need for a substantial revision of the “classical” view of the nature of the liquid state.

He is a member of the Club "July 1" .

• "New Kinds of Phase Transitions: Transformations in Disoredered Substances", Eds: VV Brazhkin, SV Buldyrev, VN Ryzhov, HE Stanley, NATO Science Series II: Mathematics, Physics and Chemistry - Vol. 81, Kluver Academic Publishers, Netherlands, 2002.
• VV Brazhkin, RN, Voloshin, SV Popova, AG Umnov, Nonmetal-metal transition in sulphur melt under high pressure, Phys. Let. A, 154, 413-415 (1991).
• VV Brazhkin, RN Voloshin, SV Popova, The kinetics of the transition of the metastable phases of SiO2, stishovite and coesite to the amorphous state, J. Non-Gryst. SoL, 136, 241-248, (1991).
• V. V. Brazhkin, R. N. Voloshin, S. V. Popova, “Semiconductor-metal transition in liquid Se”, Letters in JETP, 50, 392-395, 1989.
• Brazhkin, AG Lyapin, SV Popova, RN Voloshin, “Non-equilibrium phase transitions and amorphization in Si, Si / GaAs, Ge and Ge / GaAs”, Phys. Rev. B, No, N 12, 7549-7565, 1995.
• EL Gromnitskaya, OV Stal'gorova, VV Brazhkin, and AG Lyapin, “Ultrasonic study of the nonequilibrium pressure-temperature diagram of H ₂ O ice”, Phys. Rev. B 64, 94205-94220, 2001.
• VV Brazhkin, AG Lyapin, RJ Hemley, Harder than diamond: dreams and reality ”, Phil. Mag A 82 : (2) 231-253, 2002.
• VV Brazhkin and AG Lyapin, “Metastable High-Pressure Phases of Low- Z Compounds: Creation of a New Chemistry or a Prompt for Old Principles?”, Nature Materials, 3, 497-500, 2004.
• V.V. Brazhkin, “Metastable phases, phase transformations and phase diagrams in physics and chemistry”, UFN, 176, No. 7, 745-750, 2006.
• VV Brazhkin, “High pressure synthesized materials: treasure and hints”, High Pressure Research, 27, No. 3, 333-351, 2007.
• VV Brazhkin, Y. Katayama, MV Kondrin et al., AsS melt under pressure: one substance, three liquids, Phys. Rev. Lett 100 145701 (2008)
• VV Brazhkin, M. Kanzaki, Ken-ichi Funakoshi, and Y. Katayama, “Viscosity Behavior Spanning Four Orders of Magnitude in As-S Melts under High Pressure”, Phys. Rev. Lett , 102, 115901, 2009.
• Th. Loerting, VV Brazhkin, T. Morishita, “Multiple amorphous-amorphous transitions”, in “Advances in Chemical Physics”, vol. 143, pp. 29-82, ed. Stuart A. Rice, Wiley. (2009)
• V.V. Brazhkin, “Interparticle interaction in condensed matter: elements“ more equal than others ””, UFN, 179, No. 4, 393-401, 2009.
• VV Brazhkin, I. Farnan, K. Funakoshi, M. Kanzaki, Y. Katayama, AG Lyapin and H. Saitoh, “Structural transformations and anomalous viscosity in the B ₂ O ₃ melt under high pressure”, Phys. Rev. Lett 105, 115701, 2010.
• V.V. Brazhkin et al. “Where is the supercritical fluid region in the phase diagram?” Physics – Uspekhi 182 (11) 1137-1156 (2012)
• VV Brazhkin and Kostya Trachenko “What separates a liquid from a gas?”
• Phys. Today 65 (11), 68 (2012); doi: 10.1063 / PT.3.1796
• VV Brazhkin, E. Bychkov, OB Tsiok, “Direct volumetric study of high-pressure driven polymorphism and relaxation in glassy germanium chalcogenides”, J. Phys. Chem. B, 120, 358-363, 2016
• K. Trachenko, VV Brazhkin, “Collective mode and thermodynamics of liquid state”, Reports in progress in Physics ”, 79, No 1, 016502 (36 pp), 2016.
• MV Kondrin, NA Nikolaev, KN Boldyrev, YM Shulga, IP Zibrov and VV Brazhkin, “Bulk graphanes synthesized from benzene and pyridine” CrystEngComm, 19, 958 (2017)

• Profile of Vadim Veniaminovich Brazhkin on the official website of the RAS
• Page on the site of the IHPD named after L. F. Vereshchagin RAS
• MIPT Lecture Hall
• Publications by V.V. Brazhkin in Physics-Uspekhi
• Historical background on the website of the Archive of the Russian Academy of Sciences
• Metallic hydrogen between diamond anvils (interview with the newspaper Troitsky Variant - Science )
• Dancing under pressure. City rhythm No. 35 (599), September 7, 2016
• One that cannot be changed. New counties number 3 (219) February 10, 2017