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Tunable Narrow-band Filtering, Parametric Amplification and Mirrorless Oscillations in Doped Negative - index Materials / Popov A.K., Myslivets S.A., Shalaev V.M. // Proceedings of NATO Advance Research Workshop & META'08 : Marrakesh - Morocco, 7-10 May 2008. - Paris : LGEP-SUPELE C. - p. 580-585

Доп.точки доступа:
Popov, A. K.; Попов, Александр Кузьмич; Myslivets, S. A.; Мысливец, Сергей Александрович; Shalaev, V. M.; Шалаев, Владимир Михайлович
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Backward-wave optical parametric amplification and mirrorless oscillations in negative-index materials / Popov A.K., Myslivets S.A., Shalaev V.M. // APS March Meeting, March 10-14, 2008; New Orleans, Louisiana; Bulletin of the American Physical Society Series II, 2008. - V. 53, № 2, Abstract V28.00002, p.476

Доп.точки доступа:
Popov, A. K.; Попов, Александр Кузьмич; Myslivets, S. A.; Мысливец, Сергей Александрович; Shalaev, V. M.; Шалаев, Владимир Михайлович
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Muzalevsky, K. V.
Synthesis of an ultra-wideband pulse by a log-periodic antenna with continuous excitation by harmonic oscillations / K. V. Muzalevsky // Radiophys. Quantum Electron. - 2023. - Vol. 65, Is. 8. - P. 615-623, DOI 10.1007/s11141-023-10242-2. - Cited References: 38. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation (project No. 22–17–20042) . - ISSN 0033-8443. - ISSN 1573-9120
Аннотация: We propose a method for synthesizing ultra-wideband pulses using a vector network analyzer and a wideband transceiving log-periodic antenna. The transfer characteristic of the antenna-feeder transmission line of the system is described by the model of a two-port network whose S-matrix elements are calibrated for at least two heights of the antenna above the reflecting surface (metal plate). The proposed method of calibrating the transfer characteristic of a log-periodic antenna allows one to minimize the amplitude- and phase-frequency distortions, which are introduced to the sensing pulse by the antenna. Employing the developed method, we experimentally demonstrate a possibility of synthesizing an ultra-wideband pulse with a duration of 0.46 ns at the level of half amplitude of the envelope (when the pulse contains several field oscillations) using a log-periodic antenna with a passband of 1.36 to 4.88 GHz (at the level −10 dB). This method is specially developed for creating miniature radar systems using portable vector network analyzers and log-periodic antennas for applications to remote sensing of an underlying surface by ultra-wideband pulses from small-size unmanned aerial vehicles.

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Публикация на русском языке Музалевский, Константин Викторович. Синтезирование сверхширокополосного импульса логопериодической антенной с непрерывным возбуждением гармоническими колебаниями [Текст] / К. В. Музалевский // Изв. вузов. Радиофиз. - 2022. - Т. 65 № 8. - С. 677-686

Держатели документа:
L. V. Kirenskii Institute of Physics of Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Музалевский, Константин Викторович
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Parshin, A. M.
Interference oscillations in the optical response of a hybrid-aligned nematic with a surface disclination line to a pulsed magnetic field / A. M. Parshin, V. Y. Zyryanov, V. F. Shabanov // J. Opt. Soc. Am. B. - 2021. - Vol. 38, Is. 10. - P. 2993-2999, DOI 10.1364/JOSAB.435189. - Cited References: 29 . - ISSN 0740-3224
Кл.слова (ненормированные):
Disclination lines -- Hybrid aligned nematic -- Interference oscillations -- Light intensity -- Magnetic-field pulse -- Nematic layers -- Optical response -- Propagation of lights -- Pulsed magnetic fields -- Shift-and -- Magnetic fields
Аннотация: The propagation of light through a hybrid-aligned nematic layer with a surface disclination line is investigated in a pulsed magnetic field. The experimental dependences of light intensity I on time t accompanied by interference oscillations are presented. The shift and expansion of the interference extrema as functions of the magnetic field pulse length during the reaction are shown. The I (t) dependence for the relaxation process is calculated with allowance for scattering. The calculated I (t) dependence agrees well with the experimental dependence over the entire hybrid-aligned nematic layer, except for the surface layer.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; Паршин, Александр Михайлович
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Theoretical study of the frequency multiplier based on irregular quarter-wavelength microstrip resonator with thin magnetic film / B. A. Belyaev, A. V. Izotov, A. A. Leksikov [et al.] // Russ. Phys. J. - 2021. - Vol. 63, Is. 9. - P. 1447-1460, DOI 10.1007/s11182-021-02191-y. - Cited References: 21 . - ISSN 1064-8887
Кл.слова (ненормированные):
microstrip resonator -- thin magnetic film -- frequency multiplication -- nonlinear magnetization oscillations
Аннотация: The characteristics of a frequency doubler on a resonant microstrip structure with a thin magnetic film were studied theoretically. The electrodynamic calculation of the structure was performed within the quasi-static approximation. Nonlinear response of film magnetization was calculated taking into account the second-order terms in the Landau-Lifshitz equation. The frequency response of the microstrip resonator was calculated. It was shown that due to the use of the resonant circuit, high efficiency of the input signal energy conversion into the output signal at a doubled frequency was achieved. The optimal values of the magnitude and direction of an external static magnetic field, which ensure the maximum output power at a doubled frequency, were determined.

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Публикация на русском языке Теоретическое исследование умножителя частоты на основе нерегулярного четвертьволнового микрополоскового резонатора с тонкой магнитной пленкой [Текст] / Б. А. Беляев, А. В. Изотов, А. А. Лексиков [и др.] // Изв. вузов. Физика. - 2020. - Т. 63 № 9. - С. 3-14

Держатели документа:
Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences – Division of Federal Research Center “Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Izotov, A. V.; Изотов, Андрей Викторович; Leksikov, An. A.; Лексиков, Андрей Александрович; Solovev, P. N.; Соловьев, Платон Николаевич; Tyurnev, V. V.; Тюрнев, Владимир Вениаминович
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Charge transfer plasmons in the arrays of nanoparticles connected by conductive linkers / A. S. Fedorov, M. A. Visotin, V. S. Gerasimov [et al.] // J. Chem. Phys. - 2021. - Vol. 154, Is. 8. - Ст. 012009, DOI 10.1063/5.0040128. - Cited References: 41. - This study was supported by the Russian Science Foundation, Project No. 18-13-00363 . - ISSN 0021-9606
Кл.слова (ненормированные):
Analytical expressions -- Carrier scattering -- Charge displacement -- External electromagnetic field -- Finite difference time domain simulations -- Metallic nanoparticles -- Numerical solution -- Plasmon oscillations
Аннотация: Charge transfer plasmons (CTPs) that occur in different topology and dimensionality arrays of metallic nanoparticles (NPs) linked by narrow molecular bridges are studied. The occurrence of CTPs in such arrays is related to the ballistic motion of electrons in thin linkers with the conductivity that is purely imaginary, in contrast to the case of conventional CTPs, where metallic NPs are linked by thick bridges with the real optical conductivity caused by carrier scattering. An original hybrid model for describing the CTPs with such linkers has been further developed. For different NP arrays, either a general analytical expression or a numerical solution has been obtained for the CTP frequencies. It has been shown that the CTP frequencies lie in the IR spectral range and depend on both the linker conductivity and the system geometry. It is found that the electron currents of plasmon oscillations correspond to minor charge displacements of only few electrons. It has been established that the interaction of the CTPs with an external electromagnetic field strongly depends on the symmetry of the electron currents in the linkers, which, in turn, are fully governed by the symmetry of the investigated system. The extended model and the analytical expressions for the CTPs frequencies have been compared with the conventional finite difference time domain simulations. It is argued that applications of this novel type of plasmon may have wide ramifications in the area of chemical sensing.

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Держатели документа:
International Research Center of Spectroscopy and Quantum Chemistry - IRC SQC, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
National Research Tomsk State University, Tomsk, 634050, Russian Federation
Institute of Computational Modelling, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Federal Siberian Research Clinical Centre, FMBA of Russia, Krasnoyarsk, 660037, Russian Federation
Kyungpook National University, Daegu, 41566, South Korea

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Visotin, M. A.; Высотин, Максим Александрович; Gerasimov, V. S.; Polyutov, S. P.; Avramov, P. A.
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Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model / V. I. Kuz'min, M. A. Visotin, S. V. Nikolaev, S. G. Ovchinnikov // Phys. Rev. B. - 2020. - Vol. 101, Is. 11. - Ст. 115141, DOI 10.1103/PhysRevB.101.115141. - 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. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
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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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Kuz'min, V. I.; Кузьмин, Валерий Ипполитович; Visotin, M. A.; Высотин, Максим Александрович; Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; 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]
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    Micromagnetic analysis of edge effects in a thin magnetic film during local excitation of magnetization oscillations / B. A. Belyaev, A. V. Izotov, G. V. Skomorokhov, P. N. Solovev // Russ. Phys. J. - 2020. - Vol. 63, Is. 5. - P. 837-843, DOI 10.1007/s11182-020-02106-3. - Cited References: 19. - This research was performed with financial support of the Russian Foundation for Basic Research within the research project No. 18-32-00086 . - ISSN 1064-8887. - ISSN 1573-9228
Рубрики:
ANISOTROPIES
   SIMULATIONS
   FIELDS
Кл.слова (ненормированные):
micromagnetic simulation -- thin magnetic film -- edge effects -- ferromagnetic resonance -- magnetic anisotropy
Аннотация: The method of numerical micromagnetic simulation was used to study the magnetization dynamics of a thin film with uniaxial magnetic anisotropy during ferromagnetic resonance (FMR) excitation in it on the local sites by a linearly polarized high-frequency magnetic field emitted from the 1 mm opening in the metallic screen of the transmission line. It was established that non-uniformities of demagnetizing fields emerging near the film edges lead not only to the change in the FMR field, but also to the change in the value and direction of the uniaxial anisotropy field. The distribution of non-uniformities of the magnetic anisotropy characteristics over the area of 60 nm thick permalloy film that was measured on the scanning FMR spectrometer agrees well with the micromagnetic simulation results. Demagnetizing fields were proved to be the main cause for the edge effects in magnetic films.

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Публикация на русском языке Микромагнитный анализ краевых эффектов в тонкой магнитной пленке при локальном возбуждении колебаний намагниченности [Текст] / Б. А. Беляев, А. В. Изотов, Г. В. Скоморохов, П. Н. Соловьев // Изв. вузов. Физика. - 2020. - Т. 63 № 5. - С. 116-121

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Inst Phys, Krasnoyarsk Sci Ctr, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Izotov, A. V.; Изотов, Андрей Викторович; Skomorokhov, G. V.; Скоморохов, Георгий Витальевич; Solovev, P. N.; Соловьев, Платон Николаевич
}
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Ignatchenko, V. A.
Spin-wave oscillations in gradient ferromagnets: Exactly solvable models / V. A. Ignatchenko, D. S. Tsikalov // J. Magn. Magn. Mater. - 2020. - Vol. 510. - Ст. 166643, DOI 10.1016/j.jmmm.2020.166643. - Cited References: 36. - This work was partially supported by Russian Foundation for Basic Research , Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project No 18-42-243005 “Synthesis and investigation of magnetic properties of gradient materials that are characterized by predetermine type of the magnetic parameter change” and Krasnoyarsk Regional Fund of Science in the framework of participation in the conference “VII Euro-Asian Symposium ”Trends in MAGnetism” (EASTMAG 2019)” . - ISSN 0304-8853
Кл.слова (ненормированные):
Gradient ferromagnets -- Spin waves -- Exact solutions -- Variable anisotropy -- Variable exchange -- Spin-wave resonance
Аннотация: The method of searching for the profiles of the gradient dependence of the material parameters of matter on the coordinates that allow the exact solution of wave equations, developed previously for electromagnetic and elastic waves, was generalized to spin waves in gradient ferromagnets. Such profiles were found and exact solutions of the wave equations for a ferromagnet with uniaxial magnetic anisotropy β(z) or exchange α(z) varying in space were obtained. The obtained solutions were used to develop the theory of spin-wave resonance in gradient thin magnetic films. The dependences of the eigenfunctions mn(z), the frequencies of the discrete spectrum ωn, and the high-frequency susceptibility χn on the number of spectral levels n were found. The cardinal differences between the spin-wave spectra of films with gradients β(z) and α(z) are shown. The variable anisotropy β(z) changes the shape of the energy potential of the magnetic film and leads to a change in the discrete spectrum for frequencies ωn(n) lower than the frequency of the gradient potential well or potential barrier ωc. The variable exchange α(z) does not change the shape of the energy potential. Spin-wave oscillations occur in a rectangular potential well created by the surfaces of the film, regardless of profile α(z). The discrete frequency spectrum ωn(n) is quadratic on n, or has negligible deviations from the quadratic, for all n. An analytical expression for the effective exchange parameter is obtained. Exact solutions of the Schrodinger equation with spatially dependent effective mass m(z) were found for the profile of m(z) inverse to the function of α(z).

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
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10.

Dzebisashvili, D. M.
Quantum oscillations of magnetization in the antiferromagnetic semimetals on triangular lattice / D. M. Dzebisashvili, A. A. Khudaiberdyev // Euro-asian symposium "Trends in magnetism" (EASTMAG-2019) : Book of abstracts / чл. конс. ком.: S. G. Ovchinnikov, N. V. Volkov [et al.] ; чл. прогр. ком. D. M. Dzebisashvili [et al.]. - 2019. - Vol. 1. - Ст. C.O4. - P. 254. - Cited References: 4. - This work was financially supported by the Russian Foundation for Basic Research (RFBR) (project No. 18-02-00837) . - ISBN 978-5-9500855-7-4

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian State University of Science and Technology. MF Reshetneva, Krasnoyarsk, Russia

Доп.точки доступа:
Ovchinnikov, S. G. \чл. конс. ком.\; Овчинников, Сергей Геннадьевич; Volkov, N. V. \чл. конс. ком.\; Волков, Никита Валентинович; Dzebisashvili, D. M. \чл. прогр. ком.\; Дзебисашвили, Дмитрий Михайлович; Khudaiberdyev, A. A.; Российская академия наук; Уральское отделение РАН; Институт физики металлов им. М. Н. Михеева Уральского отделения РАН; Уральский федеральный университет им. первого Президента России Б.Н. Ельцина; Российский фонд фундаментальных исследований; Euro-Asian Symposium "Trends in MAGnetism"(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(7 ; 2019 ; Sept. ; 8-13 ; Ekaterinburg)
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