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Oleg Igorevich Barkalov

Main publications

1. Barkalov O.I., Belash I.T. and Ponyatovsky E.G.
Amorphization of the quenched high pressure phases in Zn-Sb and Cd-Sb systems // High Pressure Research. 1990.-V.4.-P. 390-392.

2. Ponyatovsky E.G. and Barkalov O.I.
Pressure-induced amorphous phases // Materials Science Reports. 1992.-V. 8.-P. 147-191.

3. Barkalov O.I., Kolesnikov A.I., Ponyatovsky E.G., Dahlborg U., Delaplane R. and Wannberg A.
Neutron diffraction study of bulk amorphous Zn41Sb59 // J. Non-Crystalline Solids. 1994.-V. 176.-P. 263-270.

4. Barkalov O.I., Aronin A.S., Abrosimova G.E. and Ponyatovsky E.G.
Formation and structural evolution of the bulk amorphous Al32Ge68 alloy on heating // J. Non-Crystalline Solids. 1996.-V. 202.-P. 266-271.

5. Antonov V.E., Barkalov O.I., Ponyatovsky E.G. and Zavolovich S.A.
Phase transformations of amorphous GaSb-Ge alloy at high pressures // High Pressure Research. 1997.-V. 15.-P. 201-220.

6. Kolesnikov A.I., Dahlborg U., Calvo-Dahlborg M., Barkalov O.I., Ponyatovsky E.G., Howells W.S. and Harkunov A.I.
Neutron diffraction study of bulk amorphous Al32Ge68 alloy // Phys.Rev.B. 1999.-V. 60.-P. 12681-12686.

7. Antonov V. E., Barkalov O. I., Fedotov V. K., Harkunov A.I., Kolyubakin A. I., Ponyatovsky E. G., Winzenick M.
Reversible phase transition between amorphous phases in the bulk Zn-Sb alloy under high pressures // Phys.Rev.B. 2000.–V.62.-No.5.-P. 3130-3135.

8. Kolyubakin A.I., Antonov V.E., Barkalov O.I., Gurov A.F., Harkunov A.I.
Transport properties of bulk amorphous semiconductor Al32Ge68 // J.Non-Cryst.Solids. 2001.-V.289.-P. 30-36

9. Antonov V. E., Barkalov O. I., Fedotov V. K., Harkunov A. I., Ponyatovsky E.G.
Phase Transformations of Amorphous Semiconductor Alloys under High Pressures // J. Phys.: Condensed Matter. 2002.-V. 14.-P. 11213-11221.

10. Antonov V.E., Barkalov O.I., Gurov A.F., Harkunov A.I., Kolyubakin A.I.
Transport Properties of the Pressure-induced Amorphous Semiconductor State of Al32Ge68 // J. Phys.: Condensed Matter. 2002.-V. 14.-P. 11227-11232.

11. O.I. Barkalov
High pressure phase equilibria of the amorphous Zn-Sb alloy O.I. Barkalov // High Pressure Research. 2003.-V. 23.-Nr. 3.-P. 317-321

12. A.I. Kolyubakin, V.E. Antonov, O.I. Barkalov, A.I. Harkunov.
Electrical properties of bulk amorphous semiconductor (GaSb)38Ge24 // Journal of Non-Crystalline Solids. 351 (2005) 3547–3550

13. О.И. Баркалов, С.Н. Клямкин, В.С. Ефимченко, В.Е. Антонов
Образование и состав клатратной фазы в системе H2-H2O при давлении до 1.8 кбар // Письма в ЖЭТФ. (2005) т. 82, в.7, с. 464-466.

14. O.I. Barkalov, A.I. Kolesnikov
Atomic structure of pressure-induced amorphous semiconductors //Forschungszentrum Karlsruhe GmbH Editors: E. Dinjus, N. Dahmen ISBN 3-923704-49-6. 147-191.

15. V. S. Efimchenko, V. E. Antonov, O. I. Barkalov, A. I. Beskrovnyy, V. K. Fedotov and S. N. Klyamkin
Phase transitions and equilibrium hydrogen content of phases in the water–hydrogen system at pressures to 1.8 kbar // High Pressure Research. (2006) v. 26, No. 4, p.439–443.

16. V. S. Efimchenko, V. E. Antonov, O. I. Barkalov, S. N. Klyamkin.
T-P Phase Diagram of the D2O-D2 System at Pressures to 1.8 kbar. // The Journal of Chemical Physics B. 112 (2008) 7026-7031.
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17. V. K. Fedotov, O. I. Barkalov, E. G. Ponyatovsky, M. Calvo-Dahlborg, U. Dahlborg and T Hansen.
Solid-state amorphization of a quenched high-pressure GaSb phase studied by real-time neutron diffraction. Evolution of the crystalline phase. // Journal of Physics: Condensed Matter 21 (2009) 045402 (7pp).
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18. V. S. Efimchenko, V. E. Antonov, O. I. Barkalov, S. N. Klyamkin and M. Tkacz.
Two triple points in the H2O-H2 system. // High Pressure Research 29(2) (2009) 250-253
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19. R. Q. Cabrera, A. Salamat, O.I. Barkalov, O. Leynaud, P. Hutchins, D. Daisenberger, D. Machon, A. Sella, D. W. Lewis, P. F. McMillan.
Pressure-induced structural transformations of the Zintl phase sodium silicide. // Journal of Solid State Chemistry 182(9) (2009) 2535-2542.
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20. O.I. Barkalov, V.G. Tissen, P. F. McMillan, M. Wilson, A. Sella, M. V. Nefedova.
Pressure-induced transformations and superconductivity of amorphous germanium. // Physical Review B 82(2) (2010) 020507.
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21. Г. Абросимова, А. Аронин, О. Баркалов, Д. Матвеев, О. Рыбченко, В. Масалов, В. Ткач.
Структурные превращения в аморфном сплаве Al85Ni6.1Co2Gd6Si0.9 при многократной прокатке. // Физика твердого тела 53(2) (2011) 209-213.
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22. S. A. Medvedev, P. Naumov, O. Barkalov, C. Shekhar, T. Palasyuk, V. Ksenofontov, G. Wortmann and C. Felser.
Structure and electrical resistivity of mixed-valent EuNi2P2 at high pressure. // J. Phys.: Condens. Matter 26 (2014) 335701 (5pp).
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23. S. A. Medvedev, O. I. Barkalov, P. Naumov, T. Palasyuk, J. Evers, T. M. Klapotke, and C. Felser.
Phase transitions of cesium azide at pressures up to 30 GPa studied using in situ Raman spectroscopy. // J. Appl. Phys. 117 (2015) 165901 (5pp).
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24. P. G. Naumov, V. Ksenofontov, I. S. Lyubutin, S. A. Medvedev, O. I. Barkalov, T. Palasyuk, E. Magos-Palasyuk, C. Felser.
Structural transitions under high-pressure in a langasite-type multiferroic Ba3TaFe3Si2O14. // Solid State Sciences 49 (2015) 37–42.
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25. Y. Qi, P.G. Naumov, M.N. Ali, C.R. Rajamathi, W. Schnelle, O. Barkalov, M. Hanfland, S.-C. Wu, C. Shekhar, Y. Sun, V. Süß, M. Schmidt, U. Schwarz, E. Pippel, P. Werner, R. Hillebrand, T. Förster, E. Kampert, S. Parkin, R.J. Cava, C. Felser, B. Yan, S.A. Medvedev
Superconductivity in Weyl semimetal candidate MoTe2 // Nature Communications 7 (2016) 11038.
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26. P. Naumov, O. Barkalov, H. Mirhosseini, C. Felser, S.A. Medvedev
Atomic and electronic structures evolution of the narrow band gap semiconductor Ag2Se under high pressure // J. Phys.: Condens. Matter 28 (2016) 385801 (6pp).
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27. Y. Qi, W. Shi, P.G. Naumov, N. Kumar, W. Schnelle, O. Barkalov, C. Shekhar, H. Borrmann, C. Felser, B. Yan, S.A. Medvedev
Pressure-driven superconductivity in the transition-metal pentatelluride HfTe5 // Phys. Rev. B 94 (2016) 054517.
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28. O.I. Barkalov, P.G. Naumov, C. Felser, S.A. Medvedev
Pressure-induced transition to Ni2In-type phase in lithium sulfide (Li2S) // Solid State Sciences 61 (2016) 220-224.
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29. P.G. Naumov, K. Filsinger, O.I. Barkalov, G.H. Fecher, S.A. Medvedev, C. Felser
Pressure-induced transition to the collapsed tetragonal phase in BaCr2As2 // Phys. Rev. B 95 (2017) 144106.
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30. J. Evers, L. Möckl, G. Oehlinger, R. Köppe, H. Schnöckel, O. Barkalov, S. Medvedev, P. Naumov
More than 50 years after its discovery in SiO2 octahedral coordination has also been established in SiS2 at high pressure // Inorg. Chem. 56(1) (2017) 372-377.
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31. S. Mangelsen, G. Naumov, O.I. Barkalov, S.A. Medvedev, W. Schnelle, M. Bobnar, S. Mankovsky, S. Polesya, C. Näther,1 H. Ebert, W. Bensch
Large nonsaturating magnetoresistance and pressure-induced phase transition in the layered semimetal HfTe2 // Phys. Rev. B 96 (2017) 205148.
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32. V.S. Efimchenko, O.I. Barkalov, V.I. Kulakov, V.B. Son, K.P. Meletov, B.M. Bulychev, I.A. Sholin, D.I. Kapustin, D. V. Matveev
Hydrogenation and dehydrogenation of the clathrate NaxSi136 // Rus. J. Inorg. Chem. 63(3) (2018) 364–368.
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33. P.G. Naumov, A.O. Baskakov, S.S. Starchikov, I.S. Lyubutin, Yu.L. Ogarkova, M.V. Lyubutina, O.I. Barkalov, S.A. Medvedev
Tuning of the electronic and vibrational properties of transition metal selenides TSe2 (T = Os, Ru) and their metallization at high pressures // JETP Letters 111(8) (2020) 456–462.
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34. O.I. Barkalov, M.A. Kuzovnikov, I.A. Sholin, N.S. Orlov
Transformations of silicon clathrate Si136 under high hydrogen pressure up to 11 GPa // Solid State Commun. 340 (2021) 114492.
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35. O.I. Barkalov, S.V. Zaitsev, V.D. Sedykh
Strontium ferrite SrFeO3-δ (2.50 ≤ 3-δ ≤ 2.87) studied by Raman and Mössbauer spectroscopy// Solid State Commun. 354 (2022) 114912.
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36. V. Sedykh, O. Rybchenko, V. Rusakov, S. Zaitsev, O. Barkalov, E. Postnova, T. Gubaidulina, D. Pchelina, V. Kulakov
Role of Fe atom valence states and oxygen vacancies in substituted lanthanum ferrite La0.67Sr0.33FeO3-γ // J. Phys. Chem. Solids 171 (2022) 111001.
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37. V. Sedykh, V. Rusakov, O. Rybchenko, A. Gapochka, K. Gavrilicheva, O. Barkalov, S. Zaitsev, V. Kulakov
Fe ion valence states and oxygen vacancies in the La0.5Sr0.5FeO3-γ ferrite under vacuum annealing // Ceramics International 49 (2023) 25640–25648.
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38. K.A. Gavrilicheva, O.I. Barkalov, V.D. Sedykh
La0.5Sr0.5FeO3-γ ferrite studied by Raman spectroscopy // Bull. Rusian Ac. Sci.: Physics 87, Suppl. S (2023) S36–S40.
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39. A.M. Ionov, O.I. Barkalov, D.A. Shulyatev, K.A. Gavrilicheva
Experimental studies of charoite mineral transformations under thermal treatment // Phys. Chem. Minerals 51, (2024) 18 (1–7).
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40. A.M. Ionov, O.I. Barkalov, D.A. Shulyatev, K.A. Gavrilicheva, O.F. Shahlevich
Charoite transformations under thermal treatment // Experiment in Geosciences 30, No. 1 (2024) 118–123.
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