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    The manifestations of the two-dimensional magnetic correlations in the nanocrystalline ribbons Fe64CO21B15 / R. S. Iskhakov [et al.] // J. Magn. Magn. Mater. - 2015. - Vol. 374. - P. 423-426, DOI 10.1016/j.jmmm.2014.08.078. - Cited References: 42 . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Проявления двумерных магнитных корреляций в нанокристаллических лентах Fe64Co21B15

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
GRAIN-SIZE DEPENDENCE
   RANDOM ANISOTROPY
   AMORPHOUS-ALLOYS
   COERCIVE FORCE
   FERROMAGNETS
   FILMS
   SATURATION
   Fe
   MICROSTRUCTURE
   EVOLUTION
Кл.слова (ненормированные):
Magnetic correlations -- Nanoclystalline alloys -- Random magnetic anisotropy -- Coercivity
Аннотация: We report and discuss the grain size dependence of the coercivity and approach magnetization to saturation in the FeCoB ribbons. Instead of expected three-dimensional magnetic correlations for 20 mu m thick ribbon with grain size about 10 nm, the observed behavior could be attributed to the two-dimensional stochastic magnetic domains and two dimensional magnetization ripple. (C) 2014 Elsevier B.V. All rights reserved.

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Держатели документа:
RAS, Kirensky Inst Phys, SB, Krasnoyarsk, Russia
Irkutsk State Univ, Irkutsk 664003, Russia
Siberian State Technol Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Balaev, A. D.; Балаев, Александр Дмитриевич; Gavriliuk, A. A.; Гаврилюк, Алексей Александрович
}
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The Fermi surface and the role of electronic correlations in Sm2-xCexCuO4 / M. M. Korshunov [et al.] // J. Phys.: Condens. Matter. - 2010. - Vol. 22, Is. 1. - Ст. 15701, DOI 10.1088/0953-8984/22/1/015701. - Cited References: 35. - We would like to thank A A Kordyuk and I Eremin for useful discussions. The authors acknowledge support from RFBR (grants 08-02-00021, 10-02-00662, 08-02-91200 and 07-02-00226), the RAS programs on 'Low temperature quantum phenomena', 'Quantum physics of condensed matter' and 'Strongly correlated electrons solids', President of Russia (grants MK-614.2009.2 (IN) and MK-3227.2008.2 (ZP)), Scientific School (grant SS-1929.2008.2), Interdisciplinary UB-SB RAS project, Dynasty Foundation (ZP) and Russian Science Support Foundation (IN). . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
T-C SUPERCONDUCTOR
   IN-GAP STATES
   SPIN CORRELATIONS
   BAND
   LA2-XSRXCUO4
   EXCITATIONS
   TRANSITION
   EVOLUTION
   SM2CUO4
   OXIDES
Кл.слова (ненормированные):
Antiferromagnetics -- Doping evolution -- Electron-doped -- Electronic correlation -- Emery model -- Experimental data -- Generalized tight bindings -- High-T -- Hybrid scheme -- Magnetic orders -- Spin-liquid -- Tight binding model -- Two-regime -- Antiferromagnetism -- Cerium -- Cerium compounds -- Copper oxides -- Corundum -- Doping (additives) -- Fermi surface -- Fermions -- Tin -- Surfaces
Аннотация: Using a LDA + GTB (local density approximation + generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high-T-c material Sm2-xCexCuO4. Parameters of the minimal tight-binding model for this system (the so-called three-band Emery model) were obtained within the NMTO (Nth-order muffin-tin orbital) method. The doping evolution of the dispersion and the Fermi surface in the presence of electronic correlations was investigated in two regimes of magnetic order: short-range (spin-liquid) and long-range (antiferromagnetic metal). Each regime is characterized by the specific topologies of the Fermi surfaces and we discuss their relation to recent experimental data.

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Держатели документа:
[Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.
Zakharova, E. V.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Nekrasov, I. A.] Russian Acad Sci, Inst Electrophys, Ekaterinburg 620016, Russia
[Pchelkina, Z. V.] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L v Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute for Electrophysics, Russian Academy of Sciences, Ekaterinburg 620016, Russian Federation
Institute for Metal Physics, Russian Academy of Sciences, Ekaterinburg 620219, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Zakharova, E. V.; Nekrasov, I. A.; Pchelkina, Z. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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Gavrichkov, V. A.
The band structure of n-type cuprate superconductors with the T '(T) structure taking into account strong electron correlation / V. A. Gavrichkov, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2004. - Vol. 98, Is. 3. - P. 556-564, DOI 10.1134/1.1705708. - Cited References: 18. - This work was financially supported by the Russian Foundation for Basic Research (project no. 03-02-16124), RFFI-KKFN “Eniseœ” (project no. 02-02-97705), INTAS (project no. 01-0654), integration program of URO and Siberian Division, Russian Academy of Sciences . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
QUASI-PARTICLES
   COPPER OXIDES
   TEMPERATURE
   LA2-XSRXCUO4
   ND2-XCEXCUO4
   EVOLUTION
   MOMENTS
Кл.слова (ненормированные):
Dielectric properties -- Electric conductance -- Electron transitions -- Electronic structure -- Fermi level -- Phase diagrams -- Semiconductor doping -- Conduction bands -- Electron correlation -- Spectral density -- Superconducting materials
Аннотация: The spectral density, dispersion relations, and the position of the Fermi level for n-doped compositions based on NCO and LCO were calculated within the framework of the generalized tight binding method. As distinguished from LCO, the dielectric gap in NCO is nonlinear in character. We observe a virtual level both at the bottom of the conduction band and at the top of the valence band in both compounds. However, its position corresponds to the extreme bottom of the conduction band in LCO and is 0.1 - 0.2 eV above the bottom in NCO. This explains why we observe Fermi level pinning in n-LCO as the concentration of the doping component grows and reproduce its absence in NCCO at low doping values. We also found both compositions to be unstable in a narrow concentration range with respect to a nonuniform charge density distribution. The relation between the phase diagram for NCCO and the calculated electronic structure is discussed. (C) 2004 MAIK "Nauka/Interperiodica".

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Публикация на русском языке Гавричков, Владимир Александрович. Зонная структура купратных сверхпроводников n-типа с T'(T)-структурой при учете сильных электронных корреляций [Текст] / В. А. Гавричков, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2004. - Т. 125 Вып. 3. - С. 630-639

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

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Гавричков, Владимир Александрович
}
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Borisov, A. A.
Temperature and concentration dependences of the electronic structure of copper oxides in the generalized tight binding method / A. A. Borisov, V. A. Gavrichkov, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2003. - Vol. 97, Is. 4. - P. 773-780, DOI 10.1134/1.1625067. - Cited References: 25 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SUPERCONDUCTING-GAP ANISOTROPY
   BAND-STRUCTURE
   FERMI-SURFACE
   NORMAL-STATE
   BI2SR2CACU2O8+DELTA
   EVOLUTION
Кл.слова (ненормированные):
Doping (additives) -- Electron transitions -- Electronic structure -- Fermi level -- Fermi surface -- Electron correlations -- Pseudogap -- Tight binding method -- Valence band -- Copper oxides
Аннотация: The electronic structure of p-type doped HTSC cuprates is calculated by explicitly taking into account strong electron correlations. The smooth evolution of the electronic structure from undoped antiferromagnetic to optimally and heavily doped paramagnetic compositions is traced. For a low doping level, in-gap impurity-type states are obtained, at which the Fermi level is pinned in the low-doping region. These states are separated by a pseudogap from the valence band. The Fermi surfaces calculated for the paramagnetic phase for various concentrations of holes are in good agreement with the results of ARPES experiments and indicate a gradual change in the Fermi surface from the hole type to the electron type. (C) 2003 MAIK "Nauka/Interperiodica".

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Публикация на русском языке Борисов, Алексей Александрович. Температурная и концентрационная зависимости электронной структуры оксидов меди в обобщенном методе сильной связи [Текст] / А. А. Борисов, В. А. Гавричков, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2003. - Т. 124 Вып. 4. - С. 862-870

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

Доп.точки доступа:
Gavrichkov, V. A.; Гавричков, Владимир Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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    Structure and luminescence properties of Eu2+ doped LuxSr2-xSiNxO4-x phosphors evolved from chemical unit cosubstitution / Z. Xia [et al.] // J. Mater. Chem. C. - 2016. - Vol. 4, Is. 6. - P. 1336-1344, DOI 10.1039/c5tc04222d. - Cited References: 32. - This work was supported by the National Natural Science Foundation of China (Grant No. 51572023 and 51272242), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), the Funds of the State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS (RERU2015022), and Fundamental Research Funds for the Central Universities (FRF-TP-15-003A2). . - ISSN 2050-7534
   Перевод заглавия: Структура и люминесцентные свойства люминофора LuxSr2-xSiNxO4-x полученного в результате со-замещения химических блоков и допированного Eu2+

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
SOLID-SOLUTION PHOSPHORS
   WHITE-LIGHT
   PHOTOLUMINESCENCE
   SUBSTITUTION
   DISCOVERY
   TRANSITIONLEDS
   EVOLUTION
   HOST
   LEDS
Аннотация: The design scheme of the chemical unit cosubstitution of [Lu3+-N3-] for [Sr2+-O2-] in Sr2SiO4:Eu2+ has been put into practice to discover the new phosphor systems with tunable luminescence properties, and the structures and photoluminescence tuning of yellow-emitting LuxSr2-xSiNxO4-x:Eu2+ phosphors have been investigated. Crystal structures of LuxSr2-x-ySiNxO4-x:yEu2+ samples were resolved using the Rietveld method, suggesting that the as-prepared Sr2SiO4 belonged to monoclinic symmetry (P21/n) of β-phase Sr2SiO4, while Sr1.97Eu0.03SiO4 and Sr1.965Eu0.03Lu0.005SiO3.995N0.005 belonged to orthorhombic symmetry (Pnma) of α-Sr2SiO4. The emission peaks of LuxSr1.97-xSiNxO4-x:0.03Eu2+ phosphors were red-shifted from 563 to 583 nm upon increasing the [Lu3+-N3-] substitution content from x = 0 to x = 0.005, furthermore, the PL emission peaks of Lu0.005Sr1.965-ySiN0.005O3.995:yEu2+ also showed a red-shift from 583 nm to 595 nm with increasing Eu2+ concentration (y = 0.03, 0.07, 0.10 and 0.15), and their corresponding red-shift mechanism has been discussed. The temperature dependent luminescence results further verified that the introduction of [Lu3+-N3-] for [Sr2+-O2-] in Sr2SiO4:Eu2+ can improve the thermal stability of the photoluminescence, which indicated that the LuxSr2-x-ySiNxO4-x:yEu2+ phosphors have potential applications in white light-emitting diodes (wLEDs). © 2016 The Royal Society of Chemistry.

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Держатели документа:
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China
School of Materials Sciences and Technology, China University of Geosciences, Beijing, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Xia, Z.; Miao, S.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chen, M.; Liu, Q.
}
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Gavrichkov, V. A.
Polarized ARPES spectra of undoped cuprates / V. A. Gavrichkov, A. A. Borisov, S. G. Ovchinnikov // Phys. Solid State. - 2001. - Vol. 43, Is. 10. - P. 1876-1884, DOI 10.1134/1.1410625. - Cited References: 15 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC-STRUCTURE
   COPPER OXIDES
   PHOTOEMISSION
   EVOLUTION
   MODEL
   HOLE
Аннотация: The spectral density (SD) in the ARPES spectra of anti ferromagnetic (AFM) dielectrics Sr2CuO2Cl2 and Ca2CuO2Cl2 along the principal symmetry directions of the Brillouin zone was studied by the generalized tight binding method. At the valence band top of these undoped cuprates in the AFM state, there is a pseudogap of magnetic nature with E-s(k) similar to 0-0.4 eV between a virtual level and the valence band proper. The observed similarity of dispersion along the Gamma -M and X-Y directions can be explained by the proximity of the B-3(1g) triplet and the Zhang-Rice singlet levels. The value of parity of the polarized ARPES spectra at the Gamma, M, and X points calculated for the AFM phase of undoped cuprates with an allowance for the partial contributions is even. The conditions favoring observation of the partial contributions in polarized ARPES spectra are indicated. Due to the spin fluctuations, the virtual level acquires dispersion and possesses a small spectral weight. Probably, this level cannot be resolved on the background of the main quasi-particle peak as a result of the damping effects. (C) 2001 MAIK "Nauka/Interperiodica".

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

Доп.точки доступа:
Borisov, A. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Гавричков, Владимир Александрович
}
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    Phase formation of (Y,Ce)2BaAl4SiO12 yellow microcrystal-glass phosphor for blue LED pumped white lighting / H. P. Ji [et al.] // Ceram. Int. - 2017. - Vol. 43, Is. 8. - P. 6425-6429, DOI 10.1016/j.ceramint.2017.02.055. - Cited References:12. - This study was partially supported by the National Natural Science Foundations of China (Grants No. 51272259, 51572232 and 51561135015). R.X. was partially supported by the JSPS KAKENHI (No. 15K06448). M.M. was partially supported by the Russian Foundation for Basic Research (Grant No. 15-52-53080) H.J. thanks the China Scholarship Council (CSC) for scholarship support. . - ISSN 0272-8842. - ISSN 1873-3956
   Перевод заглавия: Образование фаз желтых люминофоров микрокристалл-стекло для белых светодиодов с накачкой синим цветом

РУБ Materials Science, Ceramics
Рубрики:
LUMINESCENCE
EVOLUTION
Кл.слова (ненормированные):
Phosphor -- WLED -- Photoluminescence -- Cathodoluminescence
Аннотация: The (Y,Ce)2BaAl4SiO12 phosphor, a garnet-structured blue-to-yellow color convertor for WLED, exhibits an interesting “microcrystal-glass powder” feature, which can be regarded as the 4th form for phosphor, in addition to the “ceramic powder phosphor”, the “single crystal phosphor” and the “glass-ceramic phosphor”. The structure exhibits luminescent microcrystals embedding in non-luminescent glass matrix: the spherical crystals are mainly arranged around the glass phase forming a “necklace” pattern, while the individual crystals show a “core-shell” architecture regarding the luminescence intensity variation. Further combining the phase evolution evidence evaluated by Rietveld refinement, we propose the formation mechanism for such unique morphology/structure as a two-stage process, including an initial nucleation by solid state reaction and following liquid-assisted crystal growth, instead of a precipitation-crystallization process.

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Держатели документа:
China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China.
Natl Inst Mat Sci, Sialon Grp, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan.
Natl Inst Mat Sci, Nano Device Characterizat Grp, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan.
China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Zhejiang, Peoples R China.
RAS, SB, KSC, Lab Crystal Phys,Kirensky Inst Phys,Fed Res Ctr, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk 680021, Russia.
Xiamen Univ, Coll Mat, Xiamen, Peoples R China.

Доп.точки доступа:
Ji, Haipeng; Cho, Yujin; Wang, L.e.; Hirosaki, Naoto; Molokeev, M. S.; Молокеев, Максим Сергеевич; Huang, Zhaohui; Xie, Rong-Jun
}
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Interaction of iron carbide and sulfur under P–T conditions of the lithospheric mantle / Y. V. Bataleva [et al.] // Dokl. Earth Sci. - 2015. - Vol. 463, Is. 1. - P. 707-711, DOI 10.1134/S1028334X15070077. - This study was supported by the Russian Foundation for Basic Research (project no. 14-05-31061) and by the Council for Grants and Support of the Leading Scientific Schools of the President of the Russian Federation (NSh 2024.2014.5). . - ISSN 1028-334X

РУБ Geosciences, Multidisciplinary
Рубрики:
MINERAL INCLUSIONS
   DIAMOND
   CARBON
   EVOLUTION
   CORES
Аннотация: Experimental studies were performed in the Fe3C–S system at P = 6.3 GPa, T = 900–1600°C, and t = 18–20 h. The study aimed to characterize the conditions of iron carbide stability in a reduced lithospheric mantle and to reveal the possibility of the formation of elemental carbon by the interaction of iron carbide and sulfur. It was found that the reaction at T 1200°C proceeds with the formation of a pyrrhotite–graphite assemblage by the following scheme: 2Fe3C + 3S2 → 6FeS + 2C0. The crystallization of graphite at T 1200°C is accompanied by the generation of sulfide and metal–sulfide melts and via 2Fe3C + 3S2 → 6[Fe–S(melt) + Fe–S–C(melt)] + 2C(graphite)0 reaction. Resulting from the carbon-generating reactions, not only graphite crystallized in sulfide or metal–sulfide melts, but the growth of diamond also takes place. The obtained data allow one to consider cohenite as a potential source of carbon in the processes of diamond and graphite crystallization under the conditions of a reduced lithospheric mantle. The interaction of iron carbide and sulfur under which carbon extraction proceeds may be one of possible processes of the global carbon cycle. © 2015, Pleiades Publishing, Ltd

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Публикация на русском языке Взаимодействие карбида железа и серы при P–T-параметрах литосферной мантии [Текст] / Ю. В. Баталева [и др.] // Докл. акад. наук : Наука, 2015. - Т. 463 № 2. - С. 192–196

Держатели документа:
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Bataleva, Yu. V.; Palyanov, Yu. N.; Borzdov, Yu. M.; Bayukov, O. A.; Баюков, Олег Артемьевич; Sobolev, N. V.; Russian Foundation for Basic Research [14-05-31061]; Council for Grants and Support of the Leading Scientific Schools of the President of the Russian Federation [NSh 2024.2014.5]
}
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Kuz’min, V. I.
Influence of varying magnetic order in an external magnetic field on the electronic structure and Fermi surface within the t–J model / V. I. Kuz’min, S. V. Nikolaev, S. G. Ovchinnikov // JETP Letters. - 2016. - Vol. 103, Is. 2. - P. 125-130, DOI 10.1134/S0021364016020089. - Cited References: 46. - This work was supported by the Russian Science Foundation (project no. 14-12-00061). . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
C copper oxides
   Quantum oscillations
   Cuprate superconductors
   Hubbard-model
   Temperature
   Excitations
   YBa2Cu3OY
   Evolution
   Phase
Аннотация: We investigate the electronic structure of the two-dimensional t–J model in a transverse external static magnetic field with canted long-range magnetic order using cluster perturbation theory. The distribution of the spectral weight in the whole range of fields from zero to ferromagnetic saturation is explored. We demonstrate the possibility of a sharp change in a distribution of spectral weight at the Fermi level associated with the magnetic correlations when varying magnetic field.

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Публикация "на русском языке" Kuz’min V. I. Influence of varying magnetic order in an external magnetic field on the electronic structure and Fermi surface within the t–J model [Текст] / V. I. Kuz’min, S. V. Nikolaev, S. G. Ovchinnikov // Письма в Журн. эксперим. и теор. физ. : Наука, 2016. - Т. 103 Вып. 1-2. - С. 132-137

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe sh. 31, Moscow, Russian Federation

Доп.точки доступа:
Nikolaev, S. V.; Николаев, Сергей Викторович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Кузьмин, Валерий Ипполитович
}
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10.

    Pichugin, K. N.
    Frequency comb generation by symmetry-protected bound state in the continuum / K. N. Pichugin, A. F. Sadreev // J. Opt. Soc. Am. B. - 2015. - Vol. 32, Is. 8. - P. 1630-1636, DOI 10.1364/JOSAB.32.001630. - Cited References:48. - Russian Foundation for Basic Research (RFBR) (03-02-00497). . - ISSN 0740. - ISSN 1520-8540
   Перевод заглавия: Генерация частотной гребенки при помощи связанного состояния в континууме

РУБ Optics
Рубрики:
RADIATION CONTINUUM
   DIMER
   MICRORESONATOR
   EVOLUTION
   CAVITIES
   BREAKING
   EQUATION
Аннотация: We study the dynamical response of two nonlinear microresonators coupled with a photonic crystal waveguide. We find a domain in the space of frequency and amplitude of the probing light where all stationary solutions are unstable. In this domain, scattered light carries multiple harmonics with equidistantly spaced frequencies [frequency comb (FC) effect]. Two identical resonators coupled with the waveguide support the symmetry-protected bound state in the continuum whose response is singular, as the amplitude of the injected wave tends to zero. As a result, the FC interval tends to zero when the amplitude of probing light diminishes, which paves the way for all-optical generation of waves with ultralow frequency. (C) 2015 Optical Society of America

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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Пичугин, Константин Николаевич; Russian Foundation for Basic Research (RFBR) [03-02-00497]
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