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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Balashov Yu. Yu., Myagkov V. G., Bykova L. E., Volochaev M. N., Zhigalov V. S., Matsynin A. A., Galushka K. A., Bondarenko G. N., Komogortsev S. V.
Заглавие : Features of the course of the solid-state reactions in a Sn/Fe/Cu trilayer film system
Колич.характеристики :5 с
Коллективы : Nanophysics & Nanoelectronics, International Symposium
Место публикации : Tech. Phys. - 2023. - Vol. 68, Is. 7. - P.940-944. - ISSN 10637842 (ISSN), DOI 10.61011/TP.2023.07.56642.73-23. - ISSN 10906525 (eISSN)
Примечания : Cited References: 18
Аннотация: Study of the mechanisms of the solid-state reactions in Sn/Fe/Cu thin films is interesting both from a fundamental point of view and from a view of the importance of emerging intermetallics in the technology of solder joints and thin-film lithium-ion batteries. By the integrated approach, including both X-ray phase analysis and local elemental analysis of the cross-sections of the films, the phase composition and the mutual arrangement of phases were studied, at various stages of the solid-state reaction occurring at different temperatures. The observed sequence of the appearing phases differs significantly from the expected one if the mass transfer took place by a volume diffusion through the forming layers.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Skorobogatov S. A., Shaykhutdinov K. A., Balaev D. A., Pavlovskii M. S., Krasikov A. A., Terentjev K. Yu.
Заглавие : Spin dynamics and exchange interaction in orthoferrite TbFeO3 with non-Kramers rare-earth ion
Место публикации : Phys. Rev. B. - 2022. - Vol. 106, Is. 18. - Ст.184404. - ISSN 24699950 (ISSN), DOI 10.1103/PhysRevB.106.184404
Примечания : Cited References: 41. - We acknowledge A. Podlesnyak for help with INS experiments and S. E. Nikitin for stimulating discussion. The reported study was funded by RFBR, Project No. 20-32-90142. This research used resources at Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory
Аннотация: The low-temperature spin dynamics of the orthorhombic TbFeO3 perovskite has been studied. It has been found that the inelastic neutron scattering (INS) spectrum of the investigated compound contains two modes corresponding to different sublattices. It is shown that the iron subsystem orders antiferromagnetically at TN=632 K and exhibits the high-energy magnon dispersion. The magnetic dynamics of this subsystem has been described within the linear spin wave theory and the in-plane and out-of-plane exchange anisotropy has been demonstrated. The approach proposed previously to describe the magnon dispersion in the TmFeO3 compound has been used. Three levels of the nondispersive crystal electric field corresponding to Tb3+ ions have been found in the energy region below 40 meV at about 17, 26, and 35 meV. The behavior of the magnetic correlation length of the terbium subsystem has been determined by studying the diffuse scattering at different temperatures. The evolution of this subsystem has been numerically described within the point charge model. It is shown that the numerical data agree satisfactorily with the experiment and with the general concept of the single-ion approximation applied to the rare-earth subsystem of orthorhombic perovskites.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Cherkasskii, Mikhail, Farle M., Semisalova, Anna
Заглавие : Dispersion relation of nutation surface spin waves in ferromagnets
Коллективы : Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)German Research Foundation (DFG) [392402498 (SE 2853/1-1), 405553726 CRC/TRR 270]; government of the Russian Federation [075-15-2019-1886]
Место публикации : Phys. Rev. B. - 2021. - Vol. 103, Is. 17. - Ст.174435. - ISSN 2469-9950, DOI 10.1103/PhysRevB.103.174435. - ISSN 2469-9969(eISSN)
Примечания : Cited References: 45. - We acknowledge partial funding by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) Project No. 392402498 (SE 2853/1-1) and Project No. 405553726 CRC/TRR 270, and by the government of the Russian Federation (Agreement No. 075-15-2019-1886). We thank J.-E. Wegrowe, U. Nowak, and R. Mondal for valuable comments and helpful discussions
Предметные рубрики: FILMS
PROPAGATION
SOLITONS
Аннотация: Inertia effects inmagnetization dynamics are theoretically shown to result in a different type of spin waves, i.e., nutation surface spin waves, which propagate at terahertz frequencies in in-plane magnetized ferromagnetic thin films. Considering the magnetostatic limit, i.e., neglecting exchange coupling, we calculate dispersion relation and group velocity, which we find to be slower than the velocity of conventional (precession) spin waves. In addition, we find that the nutation surface spin waves are backward spin waves. Furthermore, we show that inertia causes a decrease of the frequency of the precession spin waves, namely magnetostatic surface spin waves and backward volume magnetostatic spin waves. The magnitude of the decrease depends on the magnetic properties of the film and its geometry.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Avdeeva A. Yu., Vetrov S. Ya., Timofeev I. V.
Заглавие : Splitting of a Tamm plasmon polariton at the interface between a metal and a resonant nanocomposite layer conjugated with a photonic crystal
Место публикации : J. Opt. Soc. Am. B. - 2021. - Vol. 38, Is. 6. - P.1792-1797. - ISSN 07403224 (ISSN), DOI 10.1364/JOSAB.420490
Примечания : Cited References: 36. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 19-42-240004 and by Russian Foundation for Basic Research, project No. 19-52-52006. The authors are thankful to Pavel S. Pankin for valuable discussions and comments
Аннотация: Splitting of a Tamm plasmon polariton at the interface between a metal and a nanocomposite layer conjugated with a photonic crystal (Bragg mirror) has been theoretically investigated. The splitting can be implemented when the Tamm plasmon polariton frequency approaches the resonance frequency of the nanocomposite, which consists of metallic nanoballs dispersed in a transparent matrix. The reflectance spectrum of the p-polarized waves at the normal incidence of light has been calculated. It has been established that the Tamm plasmon polariton splitting significantly depends on the concentration of nanoballs in the nanocomposite layer and its thickness. The solution of the dispersion equation derived for a sample with semi-infinite mirrors has been compared with the spectra obtained for a finite structure by the transfer matrix method.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Ovchinnikova T. M.
Заглавие : Electronic properties of NiO at ultrahigh pressure
Коллективы : Russian Science FoundationRussian Science Foundation (RSF) [18-12-00022]
Место публикации : J. Exp. Theor. Phys. - 2021. - Vol. 133, Is. 3. - P.374-381. - ISSN 1063-7761, DOI 10.1134/S106377612109003X. - ISSN 1090-6509(eISSN)
Примечания : Cited References: 90. - We are thankful to Dr. Alexander Gavriliuk and Dr. Leonid Dubrovinsky for stimulating discussions. We thank the Russian Science Foundation for the financial support under the project no. 18-12-00022
Предметные рубрики: QUASI-PARTICLE DISPERSION
TRANSITION-METAL OXIDES
X-RAY PHOTOEMISSION
Аннотация: The effect of the high pressure on the electronic properties of NiO is studied within the multielectron approach. The low energy physics is described by the effective Hubbard model based on Ni d-electrons and O p-electrons in three charge sectors of the Hilbert space: neutral states (configurations d8 + d9L + d10L2), electron removal states (configurations d7 + d8L + d9L2), and electron addition states (d9 + d10L) with L denotes a ligand hole. Due to a high spin (HS)-low spin (LS) crossover in the electron removal states at pressure PS determined by a competition of the intraatomic Hund exchange interaction and increasing with pressure crystal field 10Dq, the effective Hubbard parameter Ueff and the insulator gap Eg depend on pressure. We find weak increasing of Eg for P PS and weak decreasing Eg for P PS. The Mott-Hubbard transition pressure is estimated to be in the interval 450–650 GPa.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nemtsev I. V., Shabanova O. V., Tambasov I. A., Ivanenko A. A., Cherepakhin A. V., Shestakov N. P., Zyryanov V. Ya.
Заглавие : Methods to determine crystal lattice parameters of opal-like structures
Место публикации : J. Struct. Chem. - 2021. - Vol. 62, Is. 4. - P.641-650. - ISSN 00224766 (ISSN), DOI 10.1134/S0022476621040168
Примечания : Cited References: 45. - The research was carried out within the state assignment of the Ministry of Science and Higher Education of the Russian Federation (theme No. AAAA-A18-118041990041-8)
Аннотация: Series of high-quality spherical poly(methyl methacrylate) particles with a polydispersity less than 5% are prepared by chain-growth emulsifier-free controlled radical emulsion polymerization of methyl methacrylate in water. The average diameters in the series varied from 237 nm to 447 nm. The physico-chemical properties of obtained submicrospheres can be varied to make them more stable and stronger by a modified classical synthesis technology whereby 4-10 vol.% of dispersion medium is replaced by acetone. 2D and 3D photonic crystal structures, opals, are prepared from poly(methyl methacrylate) submicrospheres. The crystal structure of the opals is studied by IR spectroscopy and scanning electron microscopy. According to the spectroscopic data, the poly(methyl methacrylate) particles contain significant amounts of water whose evaporation leads to the shrinkage of the spheres. The stereoregularity of the synthesized polymer is studied, the glass-transition temperatures of obtained samples are determined.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nemtsev I. V., Shabanova O. V.
Заглавие : Manufacturing of opals from polymethylmethacrylate particles in dispersion media with different viscosities
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2021. - Vol. 14, Is. 2. - P.176-183. - ISSN 19971397 (ISSN), DOI 10.17516/1997-1397-2021-14-2-176-183; Журн. СФУ. Матем. и физика. - ISSN 23136022 (eISSN)
Примечания : Cited References: 42. - The study was carried out with the support of the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS". The work was supported by the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (topic no. AAAA-A18-118041990041-8)
Аннотация: The article was prepared based on the materials of the report at the first All-Russian scientific conference with international participation "YENISEI PHOTONICS – 2020". Photonic crystals are structures that have a spatial architecture with a periodically changing complex dielectric function at scales comparable to the wavelengths of light in the visible frequency range. The purpose of this study is to obtain three-dimensional photonic crystals by self-assembly from submicron spherical monodisperse particles of polymethylmethacrylate in dispersion media with different viscosities.Фотонные кристаллы — это структуры, которые имеют пространственную архитектуру с периодически изменяющейся сложной диэлектрической функцией в масштабах, сопоставимых с длинами волн света в видимом диапазоне частот. Целью данной работы является получение трёхмерных фотонных кристаллов путём самосборки из субмикронных сферических монодисперсных частиц полиметилметакрилата в дисперсных средах с различной вязкостью.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuz'min V. I., Visotin M. A., Nikolaev S. V., Ovchinnikov S. G.
Заглавие : Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model
Коллективы : RFBRRussian Foundation for Basic Research (RFBR) [18-32-00256, 18-32-01062]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [19-42-240007, 18-42-240017]
Место публикации : Phys. Rev. B. - 2020. - Vol. 101, Is. 11. - Ст.115141. - ISSN 2469-9950, DOI 10.1103/PhysRevB.101.115141. - ISSN 2469-9969(eISSN)
Примечания : Cited References: 97. - The reported study was funded by RFBR according to Research Project No. 18-32-00256 (all the results concerning the influence of short-range correlations on the electronic spectral properties). The reported study was also funded by RFBR according to Research Project No. 18-32-01062; the Russian Foundation for Basic Research and Government of Krasnoyarsk Territory, the Krasnoyarsk Regional Fund of Science to the Research Projects "Electronic correlation effects and multiorbital physics in iron-based materials and cuprates" No. 19-42-240007 and "Features of electron-phonon coupling in high-temperature superconductors with strong electron correlations" No. 18-42-240017.
Предметные рубрики: QUASI-PARTICLE DISPERSION
FERMI-SURFACE
QUANTUM OSCILLATIONS
LANCZOS METHOD
Аннотация: Cluster perturbation theory is applied to the two-dimensional Hubbard t - t' - t '' - U model to obtain doping and temperature-dependent electronic spectral function with 4 x 4 and 12-site clusters. It is shown that evolution of the pseudogap and electronic dispersion with doping and temperature is similar and in both cases it is significantly influenced by spin-spin short-range correlations. When short-range magnetic order is weakened by doping or temperature and Hubbard-I-like electronic dispersion becomes more pronounced, the Fermi arc turns into a large Fermi surface and the pseudogap closes. It is demonstrated how static spin correlations impact the overall dispersion's shape and how accounting for dynamic contributions leads to momentum-dependent spectral weight at the Fermi surface and broadening effects.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shneyder E. I., Nikolaev S. V., Zotova M. V., Kaldin R. A., Ovchinnikov S. G.
Заглавие : Polaron transformations in the realistic model of the strongly correlated electron system
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science [18-42-240017, 19-42240007]
Место публикации : Phys. Rev. B. - 2020. - Vol. 101, Is. 23. - Ст.235114. - ISSN 2469-9950, DOI 10.1103/PhysRevB.101.235114. - ISSN 2469-9969(eISSN)
Примечания : Cited References: 69. - We acknowledge the stimulating discussions with V. A. Gavrichkov, G. Seibold, and K. I. Kugel. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science according to the research project "Features of electron-phonon coupling in high-temperature superconductors with strong electronic correlations" No. 18-42-240017 and project "Electronic correlation effects and multiorbital physics in iron-based materials and cuprates" No. 19-42240007.
Предметные рубрики: ANOMALOUS-DISPERSION
PHONON INTERACTION
PHASE-TRANSITIONS
LO PHONONS
Аннотация: Electron-phonon coupling, diagonal in a real space formulation, leads to a polaron paradigm of smoothly varying properties. However, fundamental changes, namely the singular behavior of polarons, occur if off-diagonal pairing is involved into consideration. The study of polaron transformations and related properties of matter is of particular interest for realistic models, since competition between diagonal and off-diagonal electron-phonon contributions in the presence of other strong interactions can result in unconventional behavior of the system. Here we consider a two-dimensional multiband pd model of cuprate superconductors with electron-phonon interaction and analyze the features of the systems that are caused by the competition of diagonal and off-diagonal electron-phonon contributions in the limit of strong electron correlations. Using the polaronic version of the generalized tight-binding method, we describe the evolution of the band structure, Fermi surface, density of states at Fermi level, and phonon spectral function in the space of electron-phonon parameters ranging from weak to strong coupling strength of the adiabatic limit. On the phase diagram of polaron properties we reveal two quantum phase transitions and show how electron-phonon interaction gives rise to Fermi surface transformation (i) from hole pockets to true Fermi arcs and (ii) from hole to electron type of conductivity. We also demonstrate the emergence of new states in the phonon spectral function of the polaron and discuss their origin.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Avdeeva A. Yu., Vetrov S. Ya., Bikbaev R. G., Pyatnov M. V., Rudakova N. V., Timofeev I. V.
Заглавие : Chiral optical Tamm states at the interface between a Dye-doped cholesteric liquid crystal and an anisotropic mirror
Коллективы : Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [19-42-240004]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-52-52006]
Место публикации : Materials. - 2020. - Vol. 13, Is. 15. - Ст.3255. - ISSN 1996-1944(eISSN), DOI 10.3390/ma13153255
Примечания : Cited References: 44. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No. 19-42-240004 and by Russian Foundation for Basic Research, project No. 19-52-52006
Предметные рубрики: PHASE
POLARIZATION
MODES
Аннотация: The resonant splitting of optical Tamm state numerically is demonstrated. The Tamm state is localized at the interface between a resonant chiral medium and a polarization-preserving anisotropic mirror. The chiral medium is considered as a cholesteric liquid crystal doped with resonant dye molecules. The article shows that the splitting occurs when dye resonance frequency coincides with the frequency of the Tamm state. In this case the reflectance, transmittance, and absorptance spectra show two distinct Tamm modes. For both modes, the field localization is at the interface between the media. The external field control of configurable optical and structural parameters paves the way for use in tunable chiral microlaser.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vetrov S. Ya., Timofeev I. V., Shabanov V. F.
Заглавие : Localized modes in chiral photonic structures
Место публикации : Phys. Usp. - 2020. - Vol. 63, Is. 1. - P.33-56. - ISSN 1063-7869, DOI 10.3367/UFNe.2018.11.038490. - ISSN 1468-4780(eISSN)
Примечания : Cited References: 251
Предметные рубрики: CHOLESTERIC LIQUID-CRYSTAL
CONTROLLED LIGHT-SCATTERING
SCULPTURED THIN-FILMS
Аннотация: We discuss chiral structures in self-organizing, artificial, and biological materials. A review of experimental studies and recent advances in the localization of light in chiral structures is given. The behavior of polarized resonant modes in such structures is examined using the example of a one-dimensional photonic crystal containing liquid crystal materials. The anomalous spectral shifts of transmission peaks are interpreted as the contribution of the geometric phase caused by the twisting of the layers of the liquid crystal. The optical Tamm state localized at the boundary between chiral and nonchiral mirrors in the form of a cholesteric layer and a polarization-preserving anisotropic mirror is analytically and numerically described. Considerable attention is paid to the presentation of the properties of localized optical modes in the cholesteric with a resonant metal-dielectric nanocomposite. New possibilities for controlling the properties of the photonic structure are noted, due to the combination of the dispersion of the resonant medium and the intrinsic dispersion of the cholesteric. Attention is focused on controlled hybrid modes in the cholesteric structure formed by the coupling of localized modes. Possible applications and further ways of developing the concept of chiral photonic structures are deliberated.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Nemtsev I. V., Shabanova, Olga V., Shestakov N. P., Cherepakhin A. V., Zyryanov V. Ya.
Заглавие : Morphology stability of polymethylmethacrylate nanospheres formed in water-acetone dispersion medium
Место публикации : Appl. Phys. A. - 2019. - Vol. 125, Is. 10. - Ст.738. - ISSN 0947-8396, DOI 10.1007/s00339-019-3036-4. - ISSN 1432-0630(eISSN)
Примечания : Cited References: 93
Предметные рубрики: OPAL PHOTONIC CRYSTALS
POLY(METHYL METHACRYLATE)
UP-CONVERSION
Аннотация: The aim of this study is to develop a manufacturing technique of polymethylmethacrylate (PMMA) nanospheres to produce a more stable opal template. Water-acetone mixture was used as a dispersion medium to synthesize a PMMA opal structure. Morphology features, IR vibrational spectra and glass transition temperatures of the PMMA nanospheres formed in the water-acetone dispersion medium (nanospheres A) have been studied comparing with the same prepared in distilled water solution without acetone (nanospheres B). A dependence of a shrinkage degree of the nanoparticles on the acetone volume has been investigated. It has been revealed that under an electron beam action the shrinkage degree of the nanospheres A is in the range of 7-16% while the shrinkage of the nanospheres B is 18-25% at the same conditions. The nanospheres A are less flexible and soft as compared to the nanospheres B. Additionally, an ability of the PMMA nanoparticles fabricated in the water-acetone dispersion medium to form the ordered opal structures is demonstrated to be the similar to the nanospheres B.
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13.

Вид документа : Статья из сборника (выпуск монографической серии)
Шифр издания :
Автор(ы) : Kashkina L. V., Petrakovskaya E. A., Yemelyanova T. Y., Stebeleva O. P.
Заглавие : The impact of microwaves of different timing on the structural and chemical characteristics of a carbonaceous natural material
Коллективы : International Science and Engineering Conference on High Technology: Research and Applications
Место публикации : Key Eng. Mater. - 2017. - Vol. 743 KEM. - P.437-442. - , DOI 10.4028/www.scientific.net/KEM.743.437
Примечания : Cited References: 11
Ключевые слова (''Своб.индексиров.''): coal--electromagnetic energy--dispersion organic structure--organic structure--electronic structure
Аннотация: Changes in the properties of brown Kansk-Achinsk coal after exposure to microwaves have been studied using scanning electron microscopy (SEM) and electron magnetic resonance (EMR). The size composition of the samples has been investigated. The structure of coal has been found to be similar to the structure of multicomponent organic glass. The analysis of the changes in the EMR spectra of the coal samples (300 K, 83 K) exposed to microwaves has been found to gather information about the structural transformation taking place in the coal matter.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kolovsky A. R.
Заглавие : Bogoliubov depletion of the fragmented condensate in the bosonic flux ladder
Место публикации : Phys. Rev. A: American Physical Society, 2017. - Vol. 95, Is. 3. - Ст.033622. - ISSN 10502947 (ISSN), DOI 10.1103/PhysRevA.95.033622
Примечания : Cited References: 31. - The author acknowledges discussions with A. Eckardt, the hospitality of MPIPKS in Dresden, and financial support from Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, and Krasnoyarsk Region Science and Technology Support Fund through Grant No. 16-42-240746.
Ключевые слова (''Своб.индексиров.''): bosons--crystal lattices--ladders--optical lattices--bogoliubov--dispersion relations--interacting bosons--ultracold atoms--ground state
Аннотация: We theoretically analyze the ground state of weakly interacting bosons in the flux ladder - the system that has been recently realized by means of ultracold atoms in the specially designed optical lattice [M. Atala, M. Aidelsburger, M. Lohse, J. T. Barreiro, B. Paredes, and I. Bloch, Nat. Phys. 10, 588 (2014)1745-247310.1038/nphys2998]. It is argued that, for the system parameters corresponding to two degenerate minima in the Bloch dispersion relation, the ground state is a fragmented condensate. We study the Bogoliubov depletion of this condensate and discuss the role of boundary conditions. © 2017 American Physical Society.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Svetlichnyi V. A., Shabalina A. V., Lapin I. N., Goncharova D. A., Velikanov D. A., Sokolov A. Е.
Заглавие : Characterization and magnetic properties study for magnetite nanoparticles obtained by pulsed laser ablation in water
Место публикации : Appl. Phys. A. - 2017. - Vol. 123, Is. 12. - Ст.763. - ISSN 09478396 (ISSN), DOI 10.1007/s00339-017-1390-7
Примечания : Cited References: 40. - This work was conducted as a government task of the Ministry of Education and Science of the Russian Federation, Project Number 3.9604.2017/8.9.
Ключевые слова (''Своб.индексиров.''): magnetite--pulsed laser ablation--nanoparticles--dispersion
Аннотация: Magnetite (Fe3O4) nanoparticles of 1–10 nm (with the maximum at 2 nm) were obtained via pulsed laser ablation of iron target in water in form of a stable dispersion without addition of surfactants and stabilizers. The structure of the material obtained was investigated using transmission electron microscopy, scanning electron microscopy, and Brunauer–Emmett–Teller methods. To investigate the composition of the particles in the sample, such methods as Fourier transform infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry, and X-ray diffraction, were applied. Magnetite phase was found to be sufficiently pure, it was not contaminated by other iron oxide phases and contained not more than 0.5% of metallic iron in form of large particles. The study of the magnetic properties of the magnetite nanoparticles obtained has shown that they exhibit ferrimagnetic behavior at room temperature with the paramagnetic contribution explained by the presence of fine superparamagnetic particles.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kim P. D., Orlov V. A., Rudenko R. Y., Prokopenko V. S., Orlova I. N., Kobyakov A. V.
Заглавие : On the resonant state of magnetization in array of interacting nanodots
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН , Russian Science Foundation [14-15-00805]; Russian Foundation for Basic Research (RFBR) [16-32-00103]
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440. - P.171-174. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.125. - ISSN 1873-4766(eISSN)
Примечания : Cited References:35. - Authors are grateful to V. Ya. Prints for help in preparing dot arrays. Sections 3 and 4 of the work was supported by the Russian Science Foundation, project no. 14-15-00805. Section 2 of the work was supported by Russian Foundation for Basic Research (RFBR) project no. 16-32-00103.
Предметные рубрики: VORTEX
DYNAMICS
VORTICES
Ключевые слова (''Своб.индексиров.''): nanodots--magnetization--dispersion law--tiel's equation
Аннотация: Development of the interpretation of the phenomenon of the lift of the magnetic resonance frequencies degeneracy caused by the magnetostatic interaction in assemblies of nanodisks has been done. The difference of the resonance behavior of magnetic vortexes in a round and rectangular nanodots has been studied experimentally and explained.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Trabs P., Noack F., Aleksandrovsky A. S., Zaitsev A. I., Radionov N. V., Petrov V.
Заглавие : Refinement of dispersion relations in the VUV from spectral fringes in non-phase-matched second harmonic generation
Коллективы : Conference on Lasers and Electro-Optics Pacific Rim
Место публикации : 11th Conf. on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2015): IEEE-Institute Electrical and Electronics Engineers, 2016. - Vol. 2. - Ст.7376115. - ISBN 9781467371094, DOI 10.1109/CLEOPR.2015.7376115
Примечания : Cited References: 8
Аннотация: Spectral fringes in the second harmonic of fs pulses under strong phase- and group-velocity mismatch are used to evaluate the refractive index of SrB4O7 down to 160 nm, essential for random quasi-phase-matching in the VUV. © 2015 IEEE.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Rasskazov I. L., Karpov S. V., Panasyuk G. Y., Markel V. A.
Заглавие : Overcoming the adverse effects of substrate on the waveguiding properties of plasmonic nanoparticle chains
Место публикации : J. Appl. Phys.: American Institute of Physics, 2016. - Vol. 119, Is. 4. - Ст.043101. - ISSN 00218979 (ISSN), DOI 10.1063/1.4940415
Примечания : Cited References: 43. - This work has been carried out thanks to the support of the A*MIDEX project (No. ANR-11-IDEX-0001-02) funded by the “Investissements d'Avenir” French Government program, managed by the French National Research Agency (ANR) and was also supported in part by the U.S. National Science Foundation under Grant No. DMS1216970 and by the Ministry of Education and Science of the Russian Federation under Contract No. 1792.
Предметные рубрики: LINEAR-CHAINS
DISPERSION-RELATIONS
ARRAYS
RESONANCES
GUIDES
NANOSPHERES
MODES
FIELD
POLARITONS
PARTICLES
Аннотация: We have studied numerically the propagation of surface plasmon polaritons (SPPs) in linear periodic chains of plasmonic nanoparticles of different shapes. The chains are deposited on top of a thick dielectric substrate. While in many commonly considered cases the substrate tends to suppress the SPP propagation, we have found that this adverse effect is practically absent in the case when the nanoparticles have the shape of oblate spheroids with sufficiently small aspect ratio (e.g., nanodisks) whose axes of symmetry coincide with the axis of the chain. © 2016 AIP Publishing LLC.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Roginskii E. M., Krylov A. S., Markov Y. F., Smirnov M. B.
Заглавие : Lattice dynamics and baric behavior of phonons in Hg2Cl2 crystals at high hydrostatic pressures
Место публикации : Bull. Russ. Acad. Sci. Phys.: Allerton Press, 2016. - Vol. 80, Is. 9. - P.1033-1037. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873816090409
Примечания : Cited References: 12
Ключевые слова (''Своб.индексиров.''): chlorine compounds--crystal lattices--density functional theory--hydraulics--hydrostatic pressure--inorganic compounds--density functionals--high hydrostatic pressure--intermolecular interactions--orthorhombic phase--phonon spectrum--range dispersion--structural phase transition--theoretical modeling--phonons
Аннотация: A theoretical model based on long-range dispersion corrections of the charge density functional is proposed for model Hg2Cl2 calomel crystals, typical representatives of molecular inorganic compounds where the intermolecular interaction is found to play an important role. This model successfully describes the electronic state and the phonon spectrum of the above crystal, predicts the earlier unstudied phase transition at high hydrostatic pressure. Study of the baric behavior of the phonon spectrum with Raman spectroscopy observes the soft mode in the low-symmetry orthorhombic phase with the frequency softening as the pressure rises. Pressures above 9 GPa considerably transform the Raman spectra, indicating a structural phase transition. © 2016, Allerton Press, Inc.
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20.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Svetlichnyi V., Lapin I. N., Shabalina A., Velikanov D. A., Sokolov A. E.
Заглавие : Magnetite nanoparticles obtained by pulsed laser ablation in liquid
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.P9.21. - P.410. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : The work was funded by the Ministry of Education and Science of Russia (No.2014/223, code 1347)
Ключевые слова (''Своб.индексиров.''): magnetite--laser ablation--nanoparticles--dispersion
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