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Formation of bimetallic Au-Pd and Au-Pt nanoparticles under hydrothermal conditions and microwave irradiation / O. V. Belousov [et al.] // Langmuir. - 2011. - Vol. 27, Is. 18. - P. 11697-11703, DOI 10.1021/la202686x. - Cited References: 28 . - ISSN 0743-7463

РУБ Chemistry, Multidisciplinary + Chemistry, Physical + Materials Science, Multidisciplinary
Рубрики:
PROFILE REFINEMENT
   PALLADIUM BLACK
   SIZE
   CATALYSIS
   METAL
Аннотация: The reduction of chlorocomplexes of gold(III) from muriatic solutions by nanocrystal powders of palladium and platinum at 110 and 130 degrees C under hydrothermal conditions and the action of microwave irradiation has been investigated. The structure and composition of the solid phase have been characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and chemical methods. Bimetallic particles with a core-shell structure have been revealed. The obtained particles are established to have a core of the metal reductant covered with a substitutional solid (Au, Pd) solution in case of palladium, and isolated by a gold layer in the case of platinum. The main reason for such a difference is the ratio between the rates of aggregation and reduction. It has been shown by the example of the Au-Pd system that the use of microwave irradiation allows us not only to accelerate the synthesis of particles but also to obtain more homogeneous materials in comparison with conventional heating.

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Доп.точки доступа:
Belousov, O. V.; Belousova, N. V.; Sirotina, A. V.; Solovyov, L. A.; Соловьев, Леонид Александрович; Zhyzhaev, A. M.; Жижаев, Анатолий Михайлович; Zharkov, S. M.; Жарков, Сергей Михайлович; Mikhlin, Y. L.
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P-T phase diagram of iron arsenide superconductor NdFeAsO0.88F0.12 / A. G. Gavriliuk [et al.] // Europhys. Lett. - 2012. - Vol. 100, Is. 4. - Ст. 46005, DOI 10.1209/0295-5075/100/46005. - Cited References: 26. - This work is supported by DOE (grant No. DE-FG02-02ER45955), by the Russian Foundation for Basic Research (grants 11-02-00291-a, 11-02-00636-a, 12-02-90410_Ukr-a, 12-02-31534-a), by the RAS Program "Strongly correlated electronic systems", by the Russian Ministry of Science (grants 01.164.12.HB11, 16.518.11.7021), Presidium of RAS programs "Quantum physics of condensed matter" project 20.7 and "Matter at high density of energy" project 2.16, FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK 2011-1.3.1-121-018 and GK 16.740.12.0731). Work at UT Austin is supported by Energy Frontier Research in Extreme Environments (EFree) and the Carnegie/DOE Alliance Center (CDAC). SGO and MMK were partially supported by the Leading scientific schools of Russia (NSh 1044-2012.2). MMK acknowledges support from the Dynasty Foundation and ICFPM. . - ISSN 0295-5075

РУБ Physics, Multidisciplinary
Рубрики:
TRANSITION
METAL
Аннотация: NdFeAsO0.88F0.12 belongs to the recently discovered family of high-T-C iron-based superconductors. We have studied the influence of high pressure on transport properties of this material at low temperatures using the four-probe electrical conductivity technique in a diamond cell. Contrary to La-based compounds, we did not observe a maximum in T-C under pressure. Under compression, T-C drops rapidly as a linear function of pressure with the slope k = -2.8 +/- 0.1 K/GPa. Under decompression, the behavior is completely reversible. The extrapolated value of T-C at zero pressure is about T-C(0) = 51.7 +/- 0.4 K. At pressures higher than similar to 18.4 GPa, the superconducting state disappears at all measured temperatures, although electrical resistance changes slope dramatically and shows a concave behavior. These observations may be related to the Kondo effect or to a weak localization of two-dimensional carriers at high pressures and low temperatures below similar to 45 K, indicating a competition mechanism with the superconducting phase. On the bases of our experimental data, we propose a tentative P-T phase diagram of NdFeAsO0.88F0.12. Copyright (C) EPLA, 2012

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Держатели документа:
[Gavriliuk, Alexander G.
Struzhkin, Viktor V.
Yu, Yong] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA
[Gavriliuk, Alexander G.] Russian Acad Sci, Inst Crystallog, Moscow 119333, Russia
[Gavriliuk, Alexander G.
Mironovich, Anna A.] Russian Acad Sci, Inst Nucl Res, Moscow 142190, Russia
[Ovchinnikov, Sergey G.
Korshunov, Maxim M.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Ovchinnikov, Sergey G.
Korshunov, Maxim M.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Yu, Yong
Lin, Jung-Fu] Univ Texas Austin, Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA
[Jin, Changqing] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

Доп.точки доступа:
Gavriliuk, A. G.; Struzhkin, V. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Yu, Y.; Korshunov, M. M.; Коршунов, Максим Михайлович; Mironovich, A. A.; Lin, J. F.; Jin, C. Q.
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Pressure-induced spin transition and evolution of the electronic excitations of FeBO3: Resonant inelastic x-ray scattering results / J. Kim [et al.] // Europhys. Lett. - 2014. - Vol. 108, Is. 3. - Ст. 37001, DOI 10.1209/0295-5075/108/37001. - Cited References: 47. - High-pressure work was supported by DOE under Contract No. DE-FG02-02ER45955. The use of the Advanced Photon Source at the Argonne National Laboratory was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357. SGO and YuO acknowledge the President of Russia Grants NSh-1044.2012.2 and MK-1168.2012.2, the Presidium of the Russian Academy of Sciences Program 2, RFFI Grants 12-02-90410 and 12-02-31543, FCP GK-P891, and the Siberian Federal University Grant F11. AGG acknowledges support from the Russian Foundation for Basic Research grants 14-02-00483 and 15-02-03770 from RAS programs "Strongly correlated electron systems", "Elementary particle physics, fundamental nuclear physics and nuclear technologies". . - ISSN 0295-5075. - ISSN 1286-4854

РУБ Physics, Multidisciplinary
Рубрики:
LOWER-MANTLE
   SPECTRA
   STATE
   EMISSION
   COLLAPSE
   SYSTEMS
   OXIDES
   METAL
Аннотация: A high-pressure resonant inelastic x-ray scattering (RIXS) of FeBO3 at the Fe K pre-edge has been carried out to study the evolution of electronic excitations through the pressure-induced spin transition. Systematic peak shifts with insignificant peak width change are observed with increasing pressure in the high-spin state. An electronic transition occurs in tandem with the high-spin to low-spin transition, observed as the emergence of multiple new low-energy peaks in the spectra. The energy gap is reduced due to these low-energy peaks, not a peak width broadening. The observed electronic excitations are associated with dd excitations, which are calculated using a full-multiplet theory. We consider changes in crystal-field splitting and covalency to explain the observed peak shifts in the high-spin state. The new peaks that emerge upon the high- to low-spin transition are compared with dd excitations for the low-spin configuration. Copyright (C) EPLA, 2014

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Держатели документа:
Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci Troitsk, Inst Nucl Res, Moscow 142190, Russia
Russian Acad Sci, Inst Crystallog, Moscow 119333, Russia
Carnegie Inst Sci, HPCAT, Argonne, IL 60439 USA

Доп.точки доступа:
Kim, J.; Struzhkin, V. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Shvyd'ko, Y.; Upton, M. H.; Casa, D.; Gavriliuk, A. G.; Sinogeikin, S. V.; DOE [DE-FG02-02ER45955]; U.S. DOE [DE-AC02-06CH11357]; President of Russia Grants [NSh-1044.2012.2, MK-1168.2012.2]; Presidium of the Russian Academy of Sciences Program 2, RFFI [12-02-90410, 12-02-31543]; Siberian Federal University Grant [F11]; Russian Foundation for Basic Research grants from RAS programs [14-0200483, 15-02-03770]; FCP [GK-P891]
}
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Kuz'min, V. I.
Comparison of the electronic structure of the Hubbard and t - J models within the cluster perturbation theory / V. I. Kuz'min, S. V. Nikolaev, S. G. Ovchinnikov // Phys. Rev. B. - 2014. - Vol. 90, Is. 24. - Ст. 245104, DOI 10.1103/PhysRevB.90.245104. - Cited References: 37. - This work is supported by RFBR (Grants No. 13-02-01395-a, No. 14-02-31677-mol-a, and No. 14-02-00186-a), the Ministry of Education and Science of Russia (Government Contract No. 3085, SibFU 2014 GF-2), and a grant of the Russian President (Grant No. NSh-2886.2014.2). . - ISSN 1098-0121. - ISSN 1550-235X

РУБ Physics, Condensed Matter
Рубрики:
FERMION SYSTEMS
SUPERCONDUCTIVITY
METAL
Аннотация: Electronic dispersion and density of states (DOS) have been calculated for the Hubbard model and the t−J and t−J∗ models with three-site correlated hopping by the cluster perturbation theory. We have found a rather strong quantitative difference both in dispersion and DOS at all doping for the Hubbard and t−J models at the energy scale ω≳t. The three-site correlated hopping addition results in an almost negligible difference for the Hubbard and t−J∗ models. Close to the Fermi energy, at the scale ω≲J, the electronic structure of all three models is similar. We have found the line of zeros of the Green function for the t−J model that has been previously obtained for the Hubbard model by cellular dynamical mean-field theory calculations.

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Держатели документа:
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Кузьмин, Валерий Ипполитович; RFBR [13-02-01395-a, 14-02-31677-mol-a, 14-02-00186-a]; Ministry of Education and Science of Russia [3085, SibFU 2014 GF-2]; [NSh-2886.2014.2]
}
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Conditions for diamond and graphite formation from iron carbide at the P-T parameters of lithospheric mantle / Y. V. Bataleva [et al.] // Russ. Geol. Geophys. - 2016. - Vol. 57, Is. 1 : Tectonics, geodynamics, and petrology of earth’s lithosphere and mantle (to the 80th birthday of Academician Nikolai Leontievich Dobretsov). - P. 176-189, DOI 10.1016/j.rgg.2016.01.012. - Cited References:55. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054. . - ISSN 1068-7971. - ISSN 1878-030X

РУБ Geosciences, Multidisciplinary
Рубрики:
DEEP CARBON-CYCLE
   EARTHS MANTLE
   MINERAL INCLUSIONS
   HIGH-PRESSURE
   KOKCHETAV MASSI
   SUBDUCTION ZONES
   REDOX BUDGET
   FERRIC IRON
   MOSSBAUER
   METAL
Кл.слова (ненормированные):
iron carbide -- wusite -- graphite -- diamond -- oxides -- olivine -- subduction -- redox interaction -- lithospheric mantle -- high-pressure experiment
Аннотация: To estimate conditions for the stability of iron carbide under oxidation conditions and to assess the possibility of formation of elemental carbon by interaction between iron carbide and oxides, experimental modeling of redox interaction in the systems Fe3C-Fe2O3 and Fe3C-Fe2O3-MgO-SiO2 was carried out on a split-sphere high-pressure multianvil apparatus at 6.3 GPa and 900-1600 degrees C for 18-20 h. During carbide-oxide interaction in the system Fe3C-Fe2O3, graphite crystallizes in assemblage with Fe3+-containing wusite. Graphite forms from carbide carbon mainly by cohenite oxidation: Fe3C + 3Fe(2)O(3) -> 9FeO + C-0 and FeO + Fe3C -> (Fe2+, Fe3+)O + C-0. At above-solidus temperatures (>= 1400 degrees C), when metal-carbon melt is oxidized by wusite, graphite and diamond crystallize by the redox mechanism and form the Fe3+-containing wstite + graphite/diamond assemblage. Interaction in the system Fe3C-Fe2O3-MgO-SiO2 results in the formation of Fe3+-containing mannesiowusite-olivine-graphite assemblage. At >= 1500 degrees C, two melts with contrasting f(O2) values are generated: metal-carbon and silicate-oxide; their redox interaction leads to graphite crystallization and diamond growth. Under oxidation conditions, iron carbide is unstable in the presence of iron, silicon, and magnesium oxides, even at low temperatures. Iron carbide-oxide interaction at the mantle temperatures and pressures leads to the formation of elemental carbon; graphite is produced from carbide carbon mainly by redox reactions of cohenite (or metal-carbon melt) with Fe2O3 and FeO as well as by interaction between metal-carbon and silicate-oxide melts. The results obtained suggest that cohenite can be a potential source of carbon during graphite (diamond) formation in the lithospheric mantle and the interaction of iron carbide with iron, silicon, and magnesium oxides, during which carbon is extracted can be regarded as a process of the global carbon cycle. (C) 2016, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved.

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Публикация на русском языке Условия образования графита и алмаза из карбида железа при Р, Т-параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Геол. и геофиз. - 2016. - Т. 57 № 1. - С. 225-240

Держатели документа:
Russian Acad Sci, Siberian Branch, VS Sobolev Inst Geol & Mineral, Pr Akad Koptyuga 3, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Ul Pirogova 2, Novosibirsk 630090, Russia.
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; Russian Science Foundation [14-27-00054]
}
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Korshunov, M. M.
Doping-dependent evolution of low-energy excitations and quantum phase transitions within an effective model for high-T-c copper oxides / M. M. Korshunov, S. G. Ovchinnikov // Eur. Phys. J. B. - 2007. - Vol. 57, Is. 3. - P. 271-278, DOI 10.1140/epjb/e2007-00179-2. - Cited References: 49 . - ISSN 1434-6028

РУБ Physics, Condensed Matter
Рубрики:
ELECTRON CORRELATIONS
   HUBBARD-MODEL
   RANGE-ORDER
   DIMENSIONS
   WAVE
   FERMIONS
   SYSTEMS
   BANDS
   METAL
Кл.слова (ненормированные):
Doping dependent evolution -- Kinematic correlation functions -- Low energy excitations -- Quantum phase transitions -- Doping (additives) -- Electric excitation -- Mean field theory -- Parameter estimation -- Phase transitions -- Quantum theory -- Copper oxides
Аннотация: In this paper a mean-field theory for the spin-liquid paramagnetic non-superconducting phase of the p- and n-type high-T-c cuprates is developed. This theory applied to the effective t-t'-t ''-J* model with the ab initio calculated parameters and with the three-site correlated hoppings. The static spin-spin and kinematic correlation functions beyond Hubbard-I approximation are calculated self-consistently. The evolution of the Fermi surface and band dispersion is obtained for the wide range of doping concentrations x. For p-type systems the three different types of behavior are found and the transitions between these types are accompanied by the changes in the Fermi surface topology. Thus a quantum phase transitions take place at x = 0.15 and at x = 0.23.Due to the different Fermi surface topology we found for n-type cuprates only one quantum critical concentration, x = 0.2. The calculated doping dependence of the nodal Fermi velocity and the effective mass are in good agreement with the experimental data.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
ИФ СО РАН
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Max-Planck-Institut fur Physik Komplexer Systeme, 01187 Dresden, Germany

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Коршунов, Максим Михайлович
}
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Investigation of the Josephson coupling through a magnetoactive barrier (ferrimagnet, paramagnet) in Y3/4Lu1/4Ba2Cu3O7+Y-3(Al1-xFex)(5)O-12 composites / D. A. Balaev [et al.] // Phys. Solid State. - 2006. - Vol. 48, Is. 11. - P. 2046-2055, DOI 10.1134/S1063783406110023. - Cited References: 41 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
S-F-S
   MAGNETIC-PROPERTIES
   RESISTIVE PROPERTIES
   JUNCTION NETWORK
   SUPERCONDUCTOR
   Y3FE5-XALXO12
   TRANSITION
   TRANSPORT
   METAL
   FIELD
Аннотация: The transport properties of two-phase composites consisting of a high-temperature superconductor and a nonsuperconducting component with magnetic ordering are analyzed. These composites are considered as a network of "superconductor-magnetoactive insulator-superconductor" weak links of the Josephson type. Substituted garnets Y-3(Al1 - x Fe (x) )(5)O-12 (x = 0, ..., 1.0) are used as a magnetoactive component. The composites under investigation contain 92.5 vol % Y3/4Lu1/4Ba2Cu3O7 (the high-temperature superconductor) and 7.5 vol % Y-3(Al1 - x Fe (x) )(5)O-12 (x = 0, ..., 1.0). It is shown that an increase in the iron content in the Y-3(Al1 - x Fe (x) )(5)O-12 garnet leads to a reduction of the Josephson coupling strength: the temperature range in which the electrical resistance of the composites is equal to zero is reduced, and the critical current density at a temperature of 4.2 K decreases exponentially. For composites in which the iron content in the Y-3(Al1 - x Fe (x) )(5)O-12 garnet is higher than 0.1, the temperature dependence of the electrical resistance R(T) at temperatures below the transition point T-C of high-temperature superconductor crystallites has a portion in the range T-m -T-C where the resistance R(T) is independent of the transport current and the magnetic field strength. Below the temperature T-m , the dependences of the electrical resistance R(T) of the composites are nonlinear functions of the current and involve a considerable contribution from magnetoresistance. This behavior is characteristic of a network of Josephson junctions. The temperature T-m decreases with an increase in the iron content in the Y-3(Al1 - x Fe (x) )(5)O-12 garnet. The appearance of the above feature in the temperature dependences of the electrical resistance R(T) is interpreted as complete suppression of the Josephson coupling in the temperature range above T (m) due to the interaction of supercurrent carrier pairs with magnetic moments of iron atoms in the dielectric barriers separating high-temperature superconductor grains.

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Petrov, M. I.; Петров, Михаил Иванович
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Ovchinnikov, S. G.
Lifshits Quantum Phase Transitions and Rearrangement of the Fermi Surface upon a Change in the Hole Concentration in High-Temperature Superconductors / S. G. Ovchinnikov, M. M. Korshunov, E. I. Shneyder // J. Exp. Theor. Phys. - 2009. - Vol. 109, Is. 5. - Pю. 775-785, DOI 10.1134/S1063776109110077. - Cited References: 71. - The authors thank A. A. Kordyuk for discussion of the results and T. M. Ovchinnikova for technical assistance in data processing.This study was supported by the program "Quantum Physics of Condensed Media" of the Presidium of the Russian Academy of Sciences (project no. 5.7), integrated project no. 40 of the Siberian Branch-Ural Division of the Russian academy of Sciences, and the Russian Foundation for Basic Research (project no. 09-02-00127). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   CORRELATED ELECTRONS
   COPPER OXIDES
   SPECTRUM
   PSEUDOGAP
   METAL
   FLUCTUATIONS
   EXCITATIONS
   INSULATOR
   SYSTEMS
Кл.слова (ненормированные):
Critical points -- Cuprates -- Electron heat -- Electron structures -- Experimental data -- High-T -- Layered cuprates -- Low temperatures -- Normal phase -- Quantum oscillations -- Quantum phase transitions -- Sign reversal -- Strong correlation -- Copper compounds -- Electronic structure -- Equations of state -- Fermi surface -- Fermions -- High temperature superconductors -- Hole concentration -- Superconductivity -- Surface structure -- Phase transitions
Аннотация: Changes in the electronic structure in the normal phase of high-T-c superconductors (HTSCs), viz., layered cuprates, are considered. The results of LDA + GTB calculations of the electron structure and the Fermi surface of La2-xSrxCuO4 one-layer cuprates with allowance for strong correlations are compared with ARPES and quantum oscillations data. Two critical points x(c1) and x(c2) are discovered at which the rearrangement of the Fermi surface takes place. In the vicinity of these points, changes in the thermodynamic properties at low temperatures are determined using the Lifshits ideology concerning 2.5-order quantum phase transitions. A singularity delta(C/T) proportional to (x-x(e))(1/2) in the electron heat capacity agrees well with the available experimental data in the vicinity of x(c1)approximate to 0.15. Sign reversal of the Hall constant upon doping is also considered qualitatively.

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Публикация на русском языке Овчинников, Сергей Геннадьевич. Квантовые фазовые переходы Лифшица и перестройка ферми-поверхности с изменением концентрации дырок в высокотемпературных сверхпроводниках [Текст] / С. Г. Овчинников, М. М. Коршунов, Е. И. Шнейдер // Журнал экспериментальной и теоретической физики. - 2009. - Т. 136 Вып. 5. - С. 898-909

Держатели документа:
[Ovchinnikov, S. G.
Korshunov, M. M.
Shneyder, E. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Shneyder, E. I.] Reshetnikov Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
Department of Physics, University of Florida, Gainesville, FL 32611, United States
Reshetnikov Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Shneyder, E. I.; Шнейдер, Елена Игоревна; Овчинников, Сергей Геннадьевич; Presidium of the Russian Academy of Sciences [5.7]; Russian academy of Sciences; Russian Foundation for Basic Research [09-02-00127]
}
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Pyatnov, M. V.
Tunable hybrid optical modes in a bounded cholesteric liquid crystal with a twist defect / M. V. Pyatnov, S. Y. Vetrov, I. V. Timofeev // Phys. Rev. E. - 2018. - Vol. 97, Is. 3. - Ст. 032703, DOI 10.1103/PhysRevE.97.032703. - Cited References:47. - The reported study was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund for the research Projects No. 17-42-240464 and No. 18-42-243025. . - ISSN 2470-0045. - ISSN 2470-0053

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
SCULPTURED THIN-FILMS
   STRUCTURE ADJACENT
   TAMM PLASMONS
   STATES
   METAL
Аннотация: Coupling between the defect mode of a cholesteric liquid crystal and the localized mode of a cholesteric liquid crystal-phase plate-metal structure is theoretically demonstrated. It is shown that the transmittance spectrum can be tuned by changing the twist-defect angle and helix pitch, which are governed by external factors. The spectra for different circular polarizations of the incident light are different; specifically, at the nondiffracting polarization, there is no defect-mode transmittance peak.

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Держатели документа:
Siberian Fed Univ, Inst Nanotechnol Spect & Quantum Chem, Krasnoyarsk 660041, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
SB RAS, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [17-42-240464, 18-42-243025]
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10.

Thermal oxidation of a carbon condensate formed in high-frequency carbon and carbon-nickel plasma flow / G. N. Churilov [et al.] // Tech. Phys. - 2018. - Vol. 63, Is. 2. - P. 216-219, DOI 10.1134/S1063784218020093. - Cited References:12. - Transmission electron microscopy investigations were carried out on equipment of the Omsk Regional Center of Collective Use of the Siberian Branch of the Russian Academy of Sciences. This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for the Support of Scientific and R&D Activities, project no. 16-43-242148. . - ISSN 1063-7842. - ISSN 1090-6525

РУБ Physics, Applied
Рубрики:
FULLERENES
OXIDE
METAL
Аннотация: We have reported on the comparative characteristics of thermal oxidation of a carbon condensate prepared by high-frequency arc evaporation of graphite rods and a rod with a hollow center filled with nickel powder. In the latter case, along with different forms of nanodisperse carbon, nickel particles with nickel core-carbon shell structures are formed. It has been found that the processes of the thermal oxidation of carbon condensates with and without nickel differ significantly. Nickel particles with the carbon shell exhibit catalytic properties with respect to the oxidation of nanosized carbon structures. A noticeable difference between the temperatures of the end of the oxidation process for various carbon nanoparticles and nickel particles with the carbon shell has been established. The study is aimed at investigations of the effect of nickel nanoparticles on the dynamics of carbon condensate oxidation upon heating in the argon-oxygen flow.

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Публикация на русском языке Термоокисление углеродного конденсата, полученного в потоке ВЧ углеродной и углеродно-никелевой плазмы [Текст] / Г. Н. Чурилов [и др.] // Журн. техн. физ. - 2018. - Т. 88 Вып. 2. - С. 224–227

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Inst Problems Hydrocarbon Proc, Siberian Branch, Omsk 644040, Russia.
Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, Novosibirsk 630128, Russia.

Доп.точки доступа:
Churilov, G. N.; Чурилов, Григорий Николаевич; Nikolaev, N. S.; Николаев, Никита Сергеевич; Cherepakhin, A. V.; Dudnik, A. I.; Дудник, Александр Иванович; Tomashevich, E. V.; Trenikhin, M. V.; Bulina, N. G.; Russian Foundation for Basic Research; Government of Krasnoyarsk Territory; Krasnoyarsk Territorial Foundation for the Support of Scientific and RD Activities [16-43-242148]
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