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Spin-phonon coupling in CuCrS2 probed by inelastic neutron scattering [Text] / J. C.E. Rasch, M. Böhm [et al.] // DPG (Deutsche Physicalische Gesellschaft) Spring Meeting : Dresden, 22nd - 27th of March, 2009. - Ст. Th-D-2.4-06. - P367

Доп.точки доступа:
Rasch, J. C. E.; Böhm, M.; Schefer, J.; Mutka, H.; Abramova, M. G. ; Vasilyeva, I.; DPG - spring meeting of the Division Condensed Matter(2009 ; Mar. ; Dresden, Germany)
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Mn–Mn magnetic coupling interaction-induced red emission in a tetra-coordinated lattice / W. Wang, Y. Wei, L. Qiu [et al.] // Chem. Mater. - 2024. - Vol. 36, Is. 11. - P. 5574-5586, DOI 10.1021/acs.chemmater.4c00548. - Cited References: 58. - This work was supported by the National Natural Science Foundation of China (NSFC No. Grants 12374386 and 52072349). We acknowledge Prof Maxim S. Molokeev for the help of Rietveld refinement; his work was supported by the Russian Science Foundation, grant 24-43-00006 . - ISSN 0897-4756. - ISSN 1520-5002
Аннотация: Strong magnetic coupling interactions originating from a short Mn–Mn distance in some heavy Mn2+-doped matrices have important effects on luminescence of single Mn2+ ions and close-knit Mn2+–Mn2+ pairs. However, the intrinsic mechanism of controlling spectral regulation remains elusive since the underlying relationship among Mn–Mn distances, magnetic coupling interactions, and optical properties is unclear. Herein, we create an unusual red emission (620 nm) of Mn2+ in a typical tetra-coordinated lattice of Li2CdGeO4 by simply enhancing the Mn2+-doped level in addition to regular green emission (528 nm). Although the dual emission peaks occupy the same tetra-coordinated crystallographic lattice of CdO4, different temperature-dependent emission behaviors are observed, which expands a possibility in optical thermometry sensors. Detailed Mn–Mn distances are calculated via Rietveld refinement analysis, and their effects on the Mn–Mn coupling interactions are evaluated. Furthermore, the Mn–Mn coupling interaction types are identified through electron spin resonance and magnetic measurements. The continuously decreasing distances between Mn2+ ions strengthen the dipole–dipole coupling effect, resulting in the atypical red emission in a tetra-coordinated lattice environment. These findings elucidate the spectral regulation mechanism from the perspective of magnetic coupling interactions, providing a new pathway to regulate Mn2+-related emission.

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Держатели документа:
Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road , Wuhan 430074, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia

Доп.точки доступа:
Wang, W.; Wei, Y.; Qiu, L.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yang, H.; Liu, H.; Gao, R.; Guan, M.; Tu, D.; Li, G.
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A high-selectivity waveguide bandpass filter with interference suppression by more than 120 dB in rejection band / B. A. Belyaev, A. M. Serzhantov, An. A. Leksikov [et al.] // Tech. Phys. Lett. - 2023. - Vol. 49, Is. 5. - P. 72-76, DOI 10.21883/TPL.2023.05.56034.19541. - Cited References: 10. - This study was carried out under agreement No. 470 dated August 30, 2022, between the Kirensky Institute of Physics (Siberian Branch, Russian Academy of Sciences), the Regional Science Foundation, and ”AO ”NPP ”Radiosvyaz“ as part of a competitive tender of research-andengineering and innovative projects for the first climatological research and education center ”Yenisey Siberia“ . - ISSN 1063-7850. - ISSN 1090-6533
Кл.слова (ненормированные):
bandpass filter -- waveguide -- resonator -- cross-coupling
Аннотация: The design of a 10th-order waveguide bandpass filter with an additional inductive cross-coupling between non-adjacent resonators has been proposed and studied. An inductive coupling is formed by a U-shaped conductor structure with grounded ends that is formed in the filter cover. This method of cross-coupling organization ensures not only the temperature stability of the characteristics, but also the manufacturability of the structure. The high selectivity of the device is achieved by both the attenuation poles located near the passband, as well as the level of suppression in the stopbands, exceeding 120 dB. The passband loss of the fabricated filter is ~ 0.8 dB at its central frequency f0=18.2 GHz and relative bandwidth Δf/f0=1.5%. The small dimensions (135 x 30 x 10 mm) and the weight of about 200 g of the device, with simultaneously high electrical characteristics show the promise of its use, for example, in on-board and ground-based space communication systems.

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Публикация на русском языке Высокоселективный волноводный полосно-пропускающий фильтр с уровнем подавления помех более 120 dB [Текст] / Б. А. Беляев, А. М. Сержантов, Ан. А. Лексиков [и др.]. - 6 с. // Письма в ЖТФ. - 2023. - Т. 49 Вып. 10. - С. 33-38

Держатели документа:
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Serzhantov, A. M.; Сержантов, Алексей Михайлович; Leksikov, An. A.; Лексиков, Андрей Александрович; Bal'va, Ya. F.; Бальва, Ярослав Федорович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Galeev, R. G
}
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Chzhan, A. V.
Interlayer interaction and coercivity of three-layer films obtained bу chemical deposition / A. V. Chzhan, V. A. Orlov, M. N. Volochaev // Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 10. - P. 961-965, DOI 10.1134/S0031918X23601804. - Cited References: 21. - We are grateful to S.Ya. Kiparisov for the provided samples . - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
multilayer magnetic films -- interlayer interaction -- dipole coupling field -- coercivity
Аннотация: The results of experimental and theoretical studies of the coercivity and the dipole coupling field of the hysteresis loop on the thickness of the nonmagnetic interlayer in magnetic films, which are obtained via chemical deposition, are presented. Using model calculations based on the Landau–Ginzburg equations, the exchange interactions between magnetic layers with the participation of atoms from the nonmagnetic interlayer are studied. The resulting expression for the dipole coupling field describes well the exponential changes in the dipole coupling field as a function of the interlayer thickness in structures with both soft magnetic layers and layers with significantly different values of the coercivity.

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Публикация на русском языке Чжан А. В. Межслоевое взаимодействие и коэрцитивная сила трехслойных пленок, полученных химическим осаждением [Текст] / А. В. Чжан, В. А. Орлов, М. Н. Волочаев. - 5 с. // Физ. металлов и металловед. - 2023. - Т. 124 № 10. - С. 904-908

Держатели документа:
Siberian Federal University, 660041, Krasnoyarsk, Russia
Krasnoyarsk State Agrarian University, 660049, Krasnoyarsk, Russia
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Orlov, V. A.; Орлов, Виталий Александрович; Volochaev, M. N.; Волочаев, Михаил Николаевич
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    Ivanov, D. A.
    Changes of the Fermi surface topology in the three-orbital model for iron pnictides with the spin-orbit coupling / D. A. Ivanov, Y. N. Togushova, M. M. Korshunov // J. Sib. Fed. Univ. Math. Phys. - 2023. - Vol. 16, Is. 6. - P. 795-803 ; Журн. СФУ. Матем. и физ. - Cited References: 28 . - ISSN 1997-1397. - ISSN 2313-6022
   Перевод заглавия: Изменение топологии поверхности Ферми в трехорбитальной модели пниктидов железа со спин-орбитальным взаимодействием
Кл.слова (ненормированные):
Fe-based superconductors -- spin-orbit coupling -- band structure -- Fermi surface -- сверхпроводники на основе железа -- спин-орбитальное взаимодействие -- зонная структура -- поверхность Ферми
Аннотация: Effect of the spin-orbit coupling on the band structure and the Fermi surface of the three-orbital model is studied. The inter-orbital part of the model is reformulated to fully conform with the iron lattice symmetry. Because there are two iron ions in the unit cell, we introduce the intra-and inter-ion spin-orbit coupling constants to separate the effect of the related couplings on the band structure and the Fermi surface. Both the intra-and inter-ion parts lift the degeneracy of some bands at the Γ = (0, 0) point and the splitting of bands along the (0, π) ‒ (π, π) direction of the Brillouin zone. We show that the inter-ion part of the spin-orbit coupling leads to the topological change of the Fermi surface — the splitting of two Fermi surface sheets around the M = (π, π) point.
Изучено влияние спин-орбитального взаимодействия на зонную структуру и поверхность Ферми в трехорбитальной модели. Межорбитальная часть модели изменена для полного соответствия с симметрией решетки железа. Из-за наличия двух ионов железа в элементарной ячейке мы вводим внутри- и межионную константы спин-орбитального взаимодействия для разделения эффектов соответствующих взаимодействий на зонную структуру и поверхность Ферми. И внутри, и межионная части снимают вырождение некоторых зон в точке Γ = (0, 0) и вырождение вдоль направления (0, π) − (π, π) зоны Бриллюэна. Показано, что межионная часть спин-орбитального взаимодействия приводит к изменению топологии поверхности Ферми, а именно к разделению листов поверхности Ферми вблизи точки M = (π, π).

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

Доп.точки доступа:
Togushova, Y. N.; Korshunov, M. M.; Коршунов, Максим Михайлович

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    Korovushkin, M. M.
    Electrical resistivity and the Hall effect in the doped Mott-Hubbard material with strong spin-charge coupling / M. M. Korovushkin // Phys. Scr. - 2023. - Vol. 98, Is. 12. - Ст. 125922, DOI 10.1088/1402-4896/ad05ed. - Cited References: 96. - Author is grateful to V V Val’kov, A D Fedoseev, D M Dzebisashvili and M S Shustin for fruitful discussions and permanent interest in this work. Author thanks V A Mitskan and A O Zlotnikov for technical support . - ISSN 0031-8949. - ISSN 1402-4896
   Перевод заглавия: Электросопротивление и эффект Холла в допированном мотт-хаббардовском материале с сильной спин-зарядовой связью
Кл.слова (ненормированные):
Mott-Hubbard materials -- spin-charge coupling -- spin polarons -- kinetic coefficients -- electrical resistance -- Hall effect
Аннотация: The kinetic characteristics of the doped Mott-Hubbard material are considered within the realistic spin-fermion model which takes into account the strong spin-charge coupling. The kinetic equation constructed on the basis of the mechanism of carrier scattering on the spin fluctuations is solved using the multi-moment method, which allows one to analyze the temperature behavior of nonequilibrium distribution function in the problems of electrical resistivity ρ and the Hall coefficient RH. The calculated dependences ρ(T) and RH(T) for the underdoped and optimally doped regimes demonstrate good qualitative agreement with the experimental data. In particular, the Hall coefficient calculated for the underdoped regime reproduces the experimentally observed sharp drop and even a change in sign at low temperatures.

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

Доп.точки доступа:
Коровушкин, Максим Михайлович
}
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Enhancement of thermoelectric performance in Bi0.5Sb1.5Te3 particulate composites including ferroelectric BaTiO3 nanodots / Y. Cheng, J. Yang, Y. Luo [et al.] // ACS Appl. Mater. Interfaces. - 2022. - Vol. 14, Is. 32. - P. 37204-37212, DOI 10.1021/acsami.2c10424. - Cited References: 40. - This work was supported by the National Natural Science Foundation of China (51772019, 51572098, and 51632006) and the NSFC-Royal Society joint project (51811530307 and IEC\NSFC\170290) . - ISSN 1944-8244
Кл.слова (ненормированные):
thermoelectric -- ferroelectric -- BaTiO3 -- Bi0.5Sb1.5Te3 -- coupling
Аннотация: An increasing number of studies have reported producing composite structures by combining thermoelectric and functional materials. However, combining energy filtering and ferroelectric polarization to enhance the dimensionless figure of merit thermoelectric ZT remains elusive. Here we report a composite that contains nanostructured BaTiO3 embedded in a Bi0.5Sb1.5Te3 matrix. We show that ferroelectric BaTiO3 particles are evenly composited with Bi0.5Sb1.5Te3 grains reducing the concentration of free charge carriers with increasing BaTiO3 content. Additionally, as a result of the energy-filtering effect and ferroelectric polarization, the Seebeck coefficient was improved by ∼10% with a ∼10% improvement in power factors. The BaTiO3 phase can effectively scatters phonons reducing lattice thermal conductivity κl (0.5 W m–1 K–1) and increasing ZT to 1.31 at 363 K in Bi0.5Sb1.5Te3 composites with 2 vol % BaTiO3 content giving an improvement of ∼25% over pure Bi0.5Sb1.5Te3. Our work indicates that the introduction of ferroelectric nanoparticles is an effective method for optimizing the ZT of Bi0.5Sb1.5Te3-based thermoelectric materials.

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Держатели документа:
State Key Laboratory of Materials Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Hubei Province, Wuhan, 430074, China
Kirensky Institute of Physics, Federal Research Center Ksc Sb Ras, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660036, Russian Federation
School of Engineering, London South Bank University, 103 Borough Road, London, SE1 0AA, United Kingdom
School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom

Доп.точки доступа:
Cheng, Y.; Yang, J.; Luo, Y.; Li, W.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Jiang, Q.; Dunn, S.; Yan, H.
}
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Topological superconductivity and Majorana states in low-dimensional systems / V. V. Val'kov, M. S. Shustin, S. V. Aksenov [et al.] // Phys.-Usp. - 2022. - Vol. 65, Is. 1. - P. 2-39, DOI 10.3367/UFNe.2021.03.038950. - Cited References: 320. - This review was prepared in the framework of the Russian Foundation for Basic Research (RFBR) grant 19-12-50087. Part of the presented results were obtained in the framework of RFBR projects 19-02-00348, 20-32-70059, and 20-02-00015. S V A expresses his gratitude for support through a grant from the President of the Russian Federation, MK-1641.2020.2. A O Z and M S Sh express their gratitude to the Theoretical Physics and Math ematics Advancement Foundation “BASIS”. M Yu K thanks the Program for Basic Research of the NationalResearch University Higher School of Economics for support . - ISSN 1063-7869
Кл.слова (ненормированные):
low-dimensional system -- Majorana bound state -- spin-orbit coupling -- topological invariant -- Coulomb correlations -- noncollinear magnetism -- topological superconductivity -- quantum transport
Аннотация: We discuss the properties of topologically nontrivial superconducting phases and the conditions for their realization in condensed matter, the criteria for the appearance of elementary Majorana-type excitations in solids, and the corresponding principles and experimental methods for identifying Majorana bound states (MBSs). Along with the well-known Kitaev chain and superconducting nanowire (SW) models with spin-orbit coupling in an external magnetic field, we discuss models of quasi-two-dimensional materials in which MBSs are realized in the presence of noncollinear spin ordering. For finite-length SWs, we demonstrate a cascade of quantum transitions occurring with a change in the magnetic field, accompanied by a change in the fermion parity of the ground state. The corresponding anomalous behavior of the magnetocaloric effect can be used as a tool for identifying MBSs. We devote considerable attention to the analysis of the transport characteristics of devices that contain topologically nontrivial materials. The results of studying the conductance of an Aharonov-Bohm ring whose arms are connected by an SW are discussed in detail. An important feature of this device is the appearance of Fano resonances in the dependence of conductance on the magnetic field when the SW is in a topologically nontrivial phase. We establish a relation between the characteristics of such resonances and the spatial structure of the lowest-energy SW state. The conditions for the occurrence of an MBS in the phase of the coexistence of chiral d+id superconductivity and 120-degree spin ordering are determined in the framework of the t-J-V model on a triangular lattice. We take electron-electron interactions into account in discussing the topological invariants of low-dimensional superconducting materials with noncollinear spin ordering. The formation of Majorana modes in regions with an odd value of a topological ℤ invariant is demonstrated. The spatial structure of these excitations in the Hubbard fermion ensemble is determined.

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Публикация на русском языке Топологическая сверхпроводимость и майорановские состояния в низкоразмерных системах [Текст] : обзор / В. В. Вальков, M. S. Shustin, S. V. Aksenov [и др.] // Успехи физ. наук. - 2022. - Т. 192 № 1. - С. 3-44

Держатели документа:
Kirensky Institute Of Physics, Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy Of Sciences, Krasnoyarsk, Russian Federation
National Research University Higher School of Economics, ul. Myasnitskaya 20, 101000 Moscow, Russian Federation
Kapitza Institute for Physical Problems, Russian Academy of Sciences, ul. Kosygina 2, 119334 Moscow, Russian Federation

Доп.точки доступа:
Val'kov, V. V.; Вальков, Валерий Владимирович; Shustin, M. S.; Шустин, Максим Сергеевич; Aksenov, S. V.; Аксенов, Сергей Владимирович; Zlotnikov, A. O.; Злотников, Антон Олегович; Fedoseev, A. D.; Федосеев, Александр Дмитриевич; Mitskan, V. A.; Мицкан, Виталий Александрович; Kagan, M. Yu.
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Temperature dependences of the interlayer exchange constant of three-layer FeNi/Dy/FeNi films studied by the resonance method / I. G. Vazhenina, S. V. Stolyar, V. Yu. Yakovchuk [et al.] // Tech. Phys. Lett. - 2022. - Vol. 48, Is. 5. - P. 38-41, DOI 10.21883/TPL.2022.05.53477.19135. - Cited References: 22. - The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-42-240010 . - ISSN 1063-7850. - ISSN 1090-6533
Кл.слова (ненормированные):
interlayer exchange coupling -- helical magnetic structure -- ferromagnetic resonance -- three-layer films
Аннотация: Three-layer FeNi/Dy/FeNi films were studied by ferromagnetic resonance method in the temperature range from 4 to 300 K. The acoustic and optical peaks recorded in microwave spectra demonstrate the presence of exchange coupling between the ferromagnetic FeNi layers of the planar system and allow us to establish the sign and value of the constant of the interlayer exchange interaction. Temperature dependences of the interlayer exchange interaction constant for three-layer films with intermediate layer thicknesses Dy 5 and 10 nm show a number of features (change in sign and extremum point), which reflect transformations of the magnetic structure Dy.

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Публикация на русском языке Температурные зависимости межслойной обменной константы трехслойных пленок FeNi/Dy/FeNi, исследованные динамическим методом [Текст] / И. Г. Важенина, С. В. Столяр, В. Ю. Яковчук [и др.] // Письма в Журн. технич. физ. - 2022. - Т. 48 Вып. 10. - С. 8-11

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian State University of Science and Technology, Krasnoyarsk, Russia

Доп.точки доступа:
Vazhenina, I. G.; Важенина, Ирина Георгиевна; Stolyar, S. V.; Столяр, Сергей Викторович; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
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10.

Features of characteristics of second-order bandpass filters based on half-wave and quarter-wave microstrip resonators / B. A. Belyaev, Y. F. Balva, A. A. Leksikov [et al.] // Russ. Phys. J. - 2022. - Vol. 65, Is. 2. - P. 276-286, DOI 10.1007/s11182-022-02633-1. - Cited References: 37 . - ISSN 1064-8887
Кл.слова (ненормированные):
microstrip resonator -- coupling coefficient -- equivalent circuit -- bandpass filter -- dielectric substrate
Аннотация: A comparison is made of the characteristics of bandpass filters consisting of two interacting resonators, which are either half-wave or quarter-wave segments of microstrip transmission lines with the same widths of strip conductors. Plates with a thickness of 0.5 mm made of TBNS high-frequency ceramics with a relative permittivity ε = 80 were used as substrates for microstrip structures. The structures having a maximum coupling region of the resonators and the maximum value of their coupling to external ports with a wave impedance of 50 Ω were studied. The filters were tuned by selecting the gap between the strip conductors so that the maximum reflection level in the passband was equal to –20 dB. Electromagnetic simulation of 3D models showed that the fractional bandwidth of filters based on quarter-wave resonators is almost 2 times wider than the bandwidth of filters based on half-wave resonators, and this fact is confirmed by the measurement results. The discovered effect is explained by twice the characteristic impedance of a quarter-wave resonator relative to a half-wave one.

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Публикация на русском языке Особенности характеристик полосно-пропускающих фильтров второго порядка на полуволновых и четвертьволновых микрополосковых резонаторах [Текст] / Б. А. Беляев, Я. Ф. Бальва, Ан. А. Лексиков [и др.] // Изв. вузов. Физика. - 2022. - Т. 65. № 2. - С. 71-81

Держатели документа:
Siberian State University of Science and Technology named after academician M. F. Reshetnev, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Balva, Y. F.; Бальва, Ярослав Федорович; Leksikov, An. A.; Лексиков, Андрей Александрович; Serzhantov, A. M.; Khodenkov, S. A.; Shumilov, T. Y.; Шумилов, Тимофей Юрьевич
}
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11.

Quasi-bound states in the continuum with temperature-tunable Q factors and critical coupling point at Brewster's angle / B.-R. Wu, J.-H. Yang, P. S. Pankin [et al.] // Laser Photon. Rev. - 2021. - Vol. 15, Is. 5. - Ст. 2000290, DOI 10.1002/lpor.202000290. - Cited References: 35. - This work was supported by the Higher Education Sprout Project of National Chiao Tung University and Ministry of Education and the Ministry of Science and Technology (NMOST-107-2221-E-009-046-MY3; 108-2923-E-009-003-MY3; 109-2224-E-009-002; and 109-2628-E-009-007-MY3). The research was also funded by Russian Foundation for Basic Research projects No. 19-52-52006 . - ISSN 1863-8880
Кл.слова (ненормированные):
bound state in the continuum -- Brewster resonance -- distributed Bragg reflector -- liquid crystal -- optical anisotropy -- Q factor
Аннотация: Quasibound state in the continuum (quasi-BIC) is a long-lived state with a high quality factor (Q factor). Here quasi-BICs in nematic liquid crystal (LC) layer embedded between a distributed Bragg reflector (DBR) and a metal layer are studied. First, a special class of true BICs between the DBR and the metal film with field localization provided by the Brewster transverse electric (TE) reflection in the DBR is experimentally demonstrated. It is demonstrated that the Q factor of the quasi-BIC can be tuned by the LC optical axis rotation in a wide range being only restricted by metal losses. The change of coupling with the radiation channel leads to a critical coupling condition, providing a total absorption of incident light. The acquired quasi-BIC resonance is extremely sensitive to the temperature due to the narrow nematic temperature range of the LC. The quasi-BIC transforms to BIC at the LC-isotropic clearing point, due to closing of the radiation channel.

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Держатели документа:
Institute of Imaging and Biomedical Photonics and Institute of Photonic System, National Chiao Tung University and National Yang Ming Chiao Tung University, 301 Gaofa 3rd Road, Tainan, 71150, Taiwan
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Wu, B. -R.; Yang, J. -H.; Pankin, P. S.; Панкин, Павел Сергеевич; Huang, C. -H.; Lee, W.; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Chen, K. -P.
}
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12.

Critical coupling vortex with grating-induced high Q-factor optical Tamm states / R. G. Bikbaev, D. N. Maksimov, P. S. Pankin [et al.] // Opt. Express. - 2021. - Vol. 29, Is. 3. - P. 4672-4680, DOI 10.1364/OE.416132. - Cited References: 54. - Funding. Ministry of Science and Technology, Taiwan (108-2923E-009-003-MY3); Russian Foundation for Basic Research (19-52-52006); Council on grants of the President of the Russian Federation (MK-46.2021.1.2) . - ISSN 1094-4087
Кл.слова (ненормированные):
Angle of Incidence -- Bound state -- Coupled mode theory -- Critical coupling -- Dielectric grating -- High Q-factor -- Reflectance amplitudes -- Reflection amplitude
Аннотация: We investigate optical Tamm states supported by a dielectric grating placed on top of a distributed Bragg reflector. It is found that under certain conditions the Tamm state may become a bound state in the continuum. The bound state, in its turn, induces the effect of critical coupling with the reflectance amplitude reaching an exact zero. We demonstrate that the critical coupling point is located in the core of a vortex of the reflection amplitude gradient in the space of the wavelength and angle of incidence. The emergence of the vortex is explained by the coupled mode theory.

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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
Institute of Imaging and Biomedical Photonics, National Chiao Tung University, Tainan, 71150, Taiwan

Доп.точки доступа:
Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Pankin, P. S.; Панкин, Павел Сергеевич; Chen, K. -P.; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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13.

The FeIV-O• oxyl unit as a key intermediate in water oxidation on the FeIII-hydroxide: DFT predictions / A. A. Shubin, V. Y. Kovalskii, S. P. Ruzankin [et al.] // Int. J. Quantum Chem. - 2021. - Vol. 121, Is. 10. - Ст. e26610, DOI 10.1002/qua.26610. - Cited References: 21. - Aleksandr A. Shubin, Igor L. Zilberberg, and Valentin N. Parmon acknowledge the support of Russian Foundation for Basic Research under grant No. 15-29-01275. Viktor Yu. Kovalskii acknowledges the support of Russian Foundation for Basic Research under grant No. 18-33-00932. Calculations have been performed at the Siberian Supercomputer Centre SB RAS . - ISSN 0020-7608
Кл.слова (ненормированные):
negative spin density -- oxyl oxygen -- the FeOOH hydroxide -- the O-O coupling -- water oxidation
Аннотация: The O-O coupling process in water oxidation on the gamma FeOOH hydroxide catalyst is simulated by means of density functional theory using model iron cubane cluster Fe4O4(OH)4. A key reactive intermediate is proposed to be the HO-FeIV-O• oxyl unit with terminal oxo radical. The “initial” vertex FeIII(OH) moiety forms this intermediate at the calculated overpotential of 0.93 V by adding one water molecule and withdrawing two proton–electron pairs. The O-O coupling goes via water nucleophilic attack on the oxyl oxygen to form the O-O bond with a remarkably low barrier of 11 kcal/mol. This process is far more effective than alternative scenario based on direct interaction of two ferryl FeIV-O sites (with estimated barrier of 36 kcal/mol) and is comparable with the coupling between terminal oxo center and three-coordinated lattice oxo center (12 kcal/mol barrier). The process of hydroxylation of terminal oxygen inhibits the O-O coupling. Nevertheless, being more effective for ferryl oxygen, the hydroxylation in fact enhances selectivity of the O-O coupling initiated by the oxyl oxygen.

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Держатели документа:
Boreskov Institute of Catalysis, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Kirensky Institute of Physics SB RAS, FRC “Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, Russian Federation
National Research Tomsk State University, Tomsk, Russian Federation
Department of Chemistry, Kyungpook National University, Daegu, South Korea

Доп.точки доступа:
Shubin, A. A.; Kovalskii, V. Y.; Ruzankin, S. P.; Zilberberg, I. L.; Parmon, V. N.; Tomilin, F. N.; Томилин, Феликс Николаевич; Avramov, P. V.
}
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14.

Synthesis and structural, magnetic, and thermal properties of the titanium-doped Pb3Mn7O15 compound / S. N. Sofronova, E. V. Eremin, M. S. Molokeev [et al.] // Phys. Solid State. - 2021. - Vol. 63, Is. 4. - P. 654-659, DOI 10.1134/S1063783421040223. - Cited References: 10. - This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-240007 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
manganites -- magnetic phase transition -- indirect exchange coupling
Аннотация: The Pb3Mn7O15 crystals doped with titanium ions have been synthesized. The study of the structural properties has shown that titanium ions occupy positions in the interplane columns, which weakens the exchange coupling between the planes. Two anomalies in the temperature dependences of magnetization and heat capacity at 62 and 35 K have been found. It has been supposed that, at 62 K, the long-range magnetic order arises and, at 35 K, a spin-reorientation transition, as in the Pb3Mn7O15 compound, occurs.

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Публикация на русском языке Синтез, структурные, магнитные и теплофизические свойства Pb3Mn7O15, допированного ионами титана [Текст] / С. Н. Софронова, Е. В. Еремин, М. С. Молокеев [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 4. - С. 545-549

Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Eremin, E. V.; Еремин, Евгений Владимирович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Kartashev, A. V.; Карташев, Андрей Васильевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Government of the Krasnoyarsk krai; Krasnoyarsk Territorial Foundation for Support of Scientific and RD Activities [18-42-240007]
}
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15.

Fedoseev, A. D.
Realization conditions and the magnetic field dependence of corner excitations in the topological insulator with superconducting coupling on the triangular lattice / A. D. Fedoseev // J. Exp. Theor. Phys. - 2021. - Vol. 133, Is. 1. - P. 71-76, DOI 10.1134/S1063776121060029. - Cited References: 38. - This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00348), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research projects: "Study of edge states in oneand two-dimensional topological superconductors" (no. 20-42-243005), "Coulomb interactions in the problem of Majorana modes in low-dimensional systems with nontrivial topology" (no. 19-42-240011), and Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (Project MK1641.2020.2) . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
EDGE
STATES
ORDER
Аннотация: The studies of the topological properties of systems have recently been extended due to a new concept of higher-order topological insulators and superconductors. Many models were proposed for two-dimensional systems on a square lattice, where corner excitations can appear; however, the problem of existence of such excitations in superconducting systems with a triangular crystal lattice is still poorly understood. Using a topological insulator in the form of a triangle with a chiral superconducting order parameter as an example, we shows that corner excitations can exist in C3-symmetric systems. In spite of a nontopological character, these excitations have energies inside the gap of the first-order edge excitation spectrum over a wide parameter range and are well localized at the corners of the system. Gapless corner excitations are shown to exist in the system at certain parameters. The application of a magnetic field in the system plane removes the triple degeneracy of the corner excitation energy and makes it possible to control the position of the minimum-energy corner excitation using a magnetic field. At the same time the fine adjustment to achieve the gapless excitations at the chosen corner can be made with changing of the magnetic field value.

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Публикация на русском языке Федосеев, Александр Дмитриевич. Условия реализации и магнитополевая зависимость угловых возбуждений в топологическом изоляторе со сверхпроводящим спариванием на треугольной решетке [Текст] / А. Д. Федосеев // Журн. эксперим. и теор. физ. - 2021. - Т. 160 Вып. 1. - С. 88-94

Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Федосеев, Александр Дмитриевич; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory [19-02-00348]; Krasnoyarsk Regional Fund of Science [20-42-243005]; "Coulomb interactions in the problem of Majorana modes in low-dimensional systems with nontrivial topology" [19-42-240011]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK1641.2020.2]
}
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16.

Optical and magnetic properties of the DyxCo1-x/Bi/Py trilayers / N. N. Kosyrev, V. Y. Yakovchuk, G. S. Patrin [et al.] // Tech. Phys. Lett. - 2021. - Vol. 47, Is. 2. - P. 107-110, DOI 10.1134/S1063785021020097. - Cited References: 14. - This study was supported by the Russian Foundation for Basic Research, project no. 18-02-00161-a . - ISSN 1063-7850. - ISSN 1090-6533

РУБ Physics, Applied

Кл.слова (ненормированные):
exchange coupling -- magnetic springs -- ellipsometry -- magnetooptical Kerr effect
Аннотация: We report on the results of investigations of the optical and magnetooptical properties of DyxCo1 -x/Bi/Py (Py is permalloy) trilayers. The temperature dependence of the magnetization has been examined using the magnetooptical Kerr effect and the optical refractive and absorption indices have been measured by spectral ellipsometry. It is shown that the thickness of the bismuth spacer affects the exchange coupling between the permalloy and DyCo layers, which manifests itself in the change in the magnetization compensation temperature and in the character of the exchange coupling.

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Публикация на русском языке Оптические и магнитные свойства трехслойных систем DyxCo1-x/Bi/Py [Текст] / Н. Н. Косырев, В. Ю. Яковчук, Г. С. Патрин [и др.] // Письма в Журн. техн. физ. - 2021. - Т. 47 Вып. 3. - С. 7-10

Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Krasnoyarsk State Agr Univ, Achinsk Branch, Krasnoyarsk Krai 662150, Achinsk, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Kosyrev, N. N.; Косырев, Николай Николаевич; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Komarov, V. A.; Комаров, Василий Андреевич; Volchenko, E. N.; Tarasov, I. A.; Тарасов, Иван Анатольевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-02-00161-a]
}
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17.

Catalyzed M–C coupling reactions in the synthesis of σ-(pyridylethynyl)dicarbonylcyclopentadienyliron complexes / V. V. Verpekin, O. V. Semeikin, A. D. Vasiliev [et al.] // RSC Adv. - 2020. - Vol. 10, Is. 29. - P. 17014-17025, DOI 10.1039/d0ra02333g. - Cited References: 86. - This research was funded by a grant from the Russian Science Foundation (project No. 18-73-00150). . - ISSN 2046-2069

РУБ Chemistry, Multidisciplinary
Рубрики:
NONLINEAR-OPTICAL PROPERTIES
METAL ALKYNYL COMPLEXES
CARBON BOND FORMATION
Аннотация: The reactions between terminal ethynylpyridines, (trimethylsilyl)ethynylpyridines and cyclopentadienyliron dicarbonyl iodide were studied under Pd/Cu-catalyzed conditions to develop a synthetic approach to the σ-alkynyl iron complexes Cp(CO)2Fe–C≡C–R (R = ortho-, meta-, para-pyridyl). Depending on the catalyst and reagents used, the yields of the desired σ-pyridylethynyl complexes varied from 40 to 95%. In some cases the reactions with ortho-ethynylpyridine gave as byproduct the unexpected binuclear FePd μ-pyridylvinylidene complex [Cp(CO)Fe{μ2-η1(Cα):η1(Cα)-κ1(N)-Cα=Cβ(H)(o-C5H4N)}(μ-CO)PdI]. The conditions, catalysts, and reagents that provide the highest yields of the desired σ-pyridylethynyl iron compounds were determined. The methods developed allowed the synthesis of the corresponding σ-4-benzothiadiazolylethynyl complex Cp(CO)2Fe–C≡C–(4-C6H3N2S) as well. Eventually, synthetic approaches to σ-alkynyl iron complexes of the type Cp(CO)2Fe–C≡C–R (R = ortho-, meta-, para-pyridyl, 4-benzothiadiazol-2,1,3-yl) based on the Pd/Cu-catalyzed cross-coupling reactions were elaborated.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Res Ctr, Siberian Branch, Inst Chem & Chem Technol, Akademgorodok 50-24, Krasnoyarsk 660036, Russia.
Russian Acad Sci, AN Nesmeyanov Inst Organoelement Cpds, Ul Vavilova 28, Moscow 119991, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Res Ctr, Inst Phys, Akademgorodok 50-38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sobodny Prospect 79, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Verpekin, Victor V.; Semeikin, Oleg, V; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Kondrasenko, Alexander A.; Belousov, Yu. A.; Ustynyuk, Nikolai A.; Russian Science FoundationRussian Science Foundation (RSF) [18-73-00150]
}
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18.

Mode coupling in arrays of Al nanoparticles / A. E. Ershov, V. S. Gerasimov, R. G. Bikbaev [et al.] // J. Quant. Spectrosc. Radiat. Transf. - 2020. - Vol. 248. - Ст. 106961, DOI 10.1016/j.jqsrt.2020.106961. - Cited References: 81. - The reported study was funded by the grant of the President of Russian Federation (agreement 075-15-2019-676 ); the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Grant No.18-42-240013); the State contract with Siberian Federal University for scientific research; Russian Science Foundation project number 19-72-00066 (investigation of finite size effects) . - ISSN 0022-4073
Кл.слова (ненормированные):
Plasmonics -- Aluminum -- Surface lattice resonances
Аннотация: The mechanisms of coupling between the lattice modes of a two-dimensional (2D) array consisting of Al nanoparticles and the localized modes of individual Al nanoparticles have been studied in detail. The results were obtained employing the finite-difference time-domain method (FDTD) and the generalized Mie theory. It was shown that interactions of single particles with 2D lattice modes significantly change the extinction spectra depending on the particle radius and the lattice period. The Rayleigh anomalies of higher orders contribute to formation of hybrid modes resulting in increase of the extinction efficiency in short wavelength range of the spectrum. It was shown that high intensity magnetic modes are excited in aluminum nanoparticles arrays. The patterns of spatial electromagnetic field distribution at the frequencies of hybrid modes have been studied. We note that comprehensive understanding the mode coupling mechanisms in arrays paves the way for engineering different types of modern photonic devices with controllable optical properties.

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Держатели документа:
Institute of Computational Modeling SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technology, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Ershov, A. E.; Gerasimov, V. S.; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Polyutov, S. P.; Karpov, S. V.; Карпов, Сергей Васильевич
}
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19.

Ferromagnetic and spin-wave resonance in the [CoFe/Cu]N superlattice thin (30-nm) film / I. G. Vazhenina, R. S. Iskhakov, M. V. Rautskii [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 1. - P. 153-159, DOI 10.1134/S1063783420010357. - Cited References: 44. - This study was supported by the Russian Foundation for Basic Research, Government of the Krasnoyarsk Krai, and Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-243005 “Synthesis and Study of the Magnetic Properties of Gradient Materials with Different Types of a Specified Magnetic Parameter” and project “Spin” no. AAAA-A18-118020290104-2 . - ISSN 1063-7834
Кл.слова (ненормированные):
ferromagnetic and spin-wave resonance -- surface anisotropy constant -- exchange coupling constant -- superlattice
Аннотация: Angular dependences of the microwave absorption spectra of a (CoFe/Cu)N multilayer film have been studied by the ferromagnetic and spin-wave resonance techniques. The critical angle θc indicating the ranges of excitation of uniform and nonuniform spin modes, type of the boundary conditions, and surface anisotropy and exchange coupling constants have been established. It is shown that the accuracy of identification of individual modes in the spectra plays a key role in the analysis of the detected curves.

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Публикация на русском языке Ферромагнитный и спин-волновой резонанс в тонкой пленке (30 nm) сверхрешетки [CoFe/Cu]N [Текст] / И. Г. Важенина, Р. С. Исхаков, М. В. Рауцкий [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 1. - С. 110-116

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620108, Russian Federation

Доп.точки доступа:
Vazhenina, I. G.; Важенина, Ирина Георгиевна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Milyaev, M. A.; Naumova, L. I.
}
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20.

Mode coupling in arrays of Al nanoparticles [Preprint] / A. E. Ershov, V. S. Gerasimov, R. G. Bikbaev [et al.]. - Electronic text data // ArXiv. - 2020. - Ст. 1912.12830. - Cited References: 78. - The reported study was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (Grant No.18-42-240013); A.E. thanks the grant of the President of Russian Federation (agreement 075-15-2019-676)
Кл.слова (ненормированные):
plasmonics -- aluminum -- surface lattice resonances
Аннотация: The mechanisms of coupling between the lattice modes of a two-dimensional (2D) array consisting of Al nanoparticles and the localized modes of individual Al nanoparticles have been studied in detail. The results have been obtained employing the finite time difference method (FDTD) and the generalized Mie theory. It was shown that interactions of single particles with 2D lattice modes significantly change the extinction spectra depending on the particle radius and the lattice period. The Rayleigh anomalies of higher orders contribute to formation of hybrid modes resulting in increase of the extinction efficiency in short wavelength range of the spectrum. The patterns of spatial electromagnetic field distribution at the frequencies of hybrid modes have been studied. We note that comprehensive understanding the mode coupling mechanisms in arrays paves the way for engineering different types of modern photonic devices with controllable optical properties.

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Держатели документа:
Institute of Computational Modeling SB RAS, Krasnoyarsk 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
L.V. Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
Siberian State University of Science and Technology, 660014, Krasnoyarsk, Russia

Доп.точки доступа:
Ershov, A. E.; Gerasimov, V. S.; Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Polyutov, S. P.; Полютов, Сергей Петрович; Karpov, S. V.; Карпов, Сергей Васильевич
}
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