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1.


   
    A hybrid quantum–classical theory for predicting terahertz charge-transfer plasmons in metal nanoparticles on graphene / A. S. Fedorov, E. V. Eremkin, P. O. Krasnov [et al.] // J. Chem. Phys. - 2024. - Vol. 160, Is. 4. - Ст. 044117, DOI 10.1063/5.0178247. - Cited References: 61. - This study was funded by the Ministry of Science and High Education of Russian Federation, Project No. FSRZ-2023-0006. The calculations of CTPs in specific NP–graphene complexes were performed within the RSF Grant No. 23-12-20007 and the Krasnoyarsk Territorial Foundation for Support of Scientific and R & D Activities, Agreement No. 256. H. Ågren was supported by the Swedish Science Research Council on Contract No. 2022-03405 . - ISSN 0021-9606. - ISSN 1089-7690
Аннотация: Metal nanoparticle (NP) complexes lying on a single-layer graphene surface are studied with a developed original hybrid quantum–classical theory using the Finite Element Method (FEM) that is computationally cheap. Our theory is based on the motivated assumption that the carrier charge density in the doped graphene does not vary significantly during the plasmon oscillations. Charge transfer plasmon (CTP) frequencies, eigenvectors, quality factors, energy loss in the NPs and in graphene, and the absorption power are aspects that are theoretically studied and numerically calculated. It is shown the CTP frequencies reside in the terahertz range and can be represented as a product of two factors: the Fermi level of graphene and the geometry of the NP complex. The energy losses in the NPs are predicted to be inversely dependent on the radius R of the nanoparticle, while the loss in graphene is proportional to R and the interparticle distance. The CTP quality factors are predicted to be in the range ~ 10 – 100. The absorption power under CTP excitation is proportional to the scalar product of the CTP dipole moment and the external electromagnetic field. The developed theory makes it possible to simulate different properties of CTPs 3–4 orders of magnitude faster compared to the original FEM or the finite-difference time domain method, providing possibilities for predicting the plasmonic properties of very large systems for different applications.

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Держатели документа:
International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Computational Modeling SB RAS, 660036 Krasnoyarsk, Russia
Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Eremkin, E. V.; Krasnov, P. O.; Gerasimov, V. S.; Agren, H.; Polyutov, S. P.
}
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2.


   
    Application of DUT-4 MOF structure switching for optical and electrical humidity sensing / A. S. Krylov, S. A. Shipilovskikh, S. N. Krylova [et al.] // Dalton Trans. - 2024. - Vol. 53, Is. 8. - P. 3459-3464, DOI 10.1039/D4DT00038B. - Cited References: 37. - The authors acknowledge the support by the state assignment of the Kirensky Institute of Physics FRC KSC SB RAS, also this work was financially supported by the RFBR (Russian Foundation for Basic Research), project no. 21-52-12018. S. A. S. acknowledges the financial support by the Russian Science Foundation (chemical part, Grant No. 22-73-10069 "Design and application of flexible metal organic frameworks for photonics devices"). V.A.M. acknowledges the Priority 2030 Federal Academic Leadership Program Ivan Sergeev (student in ITMO Univ.) for supporting in IV curve analysis. Raman, FTIR and SEM experiments were performed in the Center for Common Use of the Krasnoyarsk Scientific Center SB RAS (Krasnoyarsk, Russia) . - ISSN 1477-9226. - ISSN 1477-9234
Аннотация: The threshold structural transformation of the DUT-4 metal–organic framework (MOF) from an ordered to distorted phase during exposure to ambient conditions has been revealed. The in situ X-ray diffraction analysis, in situ Raman and FTIR spectroscopy, scanning electron microscopy and synchronous thermal analysis have been used for investigation. The reversible effect of exposure time and humidity on such a phase transition has been confirmed. We also demonstrated that the observed phase transition correlated well with changes in the optical and electronic properties of DUT-4, paving the way to a new family of MOF-based phase change materials for optoelectronic applications.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
ITMO University, St. Petersburg, Russia
Siberian Federal University, Krasnoyarsk, Russia
South Ural State University, Chelyabinsk, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Akademgorodok 50, 660036 Krasnoyarsk, Russia
Institut Jean Lamour, Universite de Lorraine, UMR CNRS 7198, 54011 Nancy, France

Доп.точки доступа:
Krylov, A. S.; Крылов, Александр Сергеевич; Shipilovskikh, S. A.; Krylova, S. N.; Крылова, Светлана Николаевна; Slyusarenko, N. V.; Timofeeva, M.; Kenzhebayeva, Yu. A.; Bachinin, S. V.; Yushina, I. D.; Cherepakhin, A. V.; Черепахин, Александр Владимирович; Shestakov, N. P.; Шестаков, Николай Петрович; Nemtsev, I. V.; Vtyurin, A. N.; Втюрин, Александр Николаевич; Milichko, V. A.
}
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3.


   
    Auger electron spectroscopy of thin Cr2GeC films / T. A. Andryushchenko, S. A. Lyaschenko, S. N. Varnakov [et al.] // Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 14. - P. 1776-1782, DOI 10.1134/S0031918X2360135X. - Cited References: 33. - The research was supported by the Russian Science Foundation (grant no. 21-12-00226, http://rscf.ru/project/21-12-00226/) . - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
МАХ phases -- chromium germanides -- epitaxial thin films -- Auger electron spectroscopy -- magnetron sputtering co-deposition
Аннотация: Auger electron spectroscopy was used to determine the phase composition of Cr2GeC MAX phase thin films. A distinctive feature of the formation of carbon-containing MAX phases is the shape of carbon Auger peaks, which is characteristic of metal carbides spectra. Features of the Auger spectra in the presence of secondary phases of chromium germanides are found. Their presence can manifest itself in an increase in the energy of the germanium peaks, which is caused by a chemical shift during the formation of the Cr–Ge bond. Moreover, we have detected the accumulation of electronic charge, which can be explained by the features of the surface morphology.

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

Доп.точки доступа:
Andryushchenko, T. A.; Андрющенко, Татьяна Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Nemtsev, I. V.; Немцев, Иван Васильевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Maximova, O. A.; Максимова, Ольга Александровна; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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4.


   
    Biological activity of fullerenols of various structure. The role of reactive oxygen species. Bioluminescent monitoring / E. S. Sushko, A. S. Sachkova, Н. Г. Внукова [et al.] // Biophysical reviews : 7th Congress of Biophysicists of Russia : conference proceedings. - 2023. - Vol. 15, Is. 5. - Ст. S7.437. - P. 1663DOI 10.1007/s12551-023-01150-w

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Публикация на русском языке Биологическая активность фуллеренолов различной структуры. Роль активных форм кислорода. Биолюминесцентный мониторинг [Текст] / Е. С. Сушко, А. С. Сачкова, Н. Г. Внукова [и др.] // VII Съезд биофизиков России : сборник научных трудов : в 2-х т. - Краснодар, 2023. - Т. 2. - С. 11

Держатели документа:
Institute of Biophysics SB RAS, FRC KSC SB RAS
Institute of Physics SB RAS, FRC KSC SB RAS
Tomsk Polytechnic University
Siberian Federal University, Krasnoyarsk
FRC KSC SB RAS, Krasnoyarsk

Доп.точки доступа:
Sushko, E. S.; Сушко, Екатерина Сергеевна; Sachkova, A. S.; Внукова, Наталья Григорьевна; Vnukova, N. G.; Чурилов, Григорий Николаевич; Churilov, G. N.; Stepin, E. A.; Kicheeva, A. G.; Kudryasheva, N. S.; Кудряшова, Надежда Степановна; Congress of Biophysicists of Russia(7 ; 2023 ; Apr. 17-23 ; Krasnodar)
}
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5.


   
    Chemical pressure as an effective tool for tuning the structural disordering and barocaloric efficiency of complex fluorides (NH4)3MF7 (M: Sn, Ti, Ge, Si) / I. N. Flerov, M. V. Gorev, E. V. Bogdanov, N. M. Laptash // J. Phys. D: Appl. Phys. - 2024. - Vol. 57, Is. 17. - Ст. 175301, DOI 10.1088/1361-6463/ad211b. - Cited References: 39. - The study was supported by a Grant from the Russian Science Foundation No. 23-22-00115, https://rscf.ru/project/23-22-00115/ . - ISSN 0022-3727. - ISSN 1361-6463
Кл.слова (ненормированные):
fluorides -- phase transformation -- phase diagram -- entropy -- pressure -- barocaloric effect
Аннотация: Double fluoride salts (NH4)3M4+F7 (M4+: Sn, Ti, Ge, Si) demonstrate a high efficiency of using chemical pressure as a tool for control and tuning structural ordering/disordering, sensitivity to hydrostatic pressure, successions of the phase transitions, etc and, as a result, for purposeful variation within a wide range of parameters of barocaloric effect (BCE). The conventional and inverse BCEs near the triple points were found on the T − p phase diagrams, combination of which can be used to construct original cooling cycle in narrow temperature and pressure ranges. Reconstructive transformation between two cubic phases, Pm3-m ↔ Pa3-, realized in (NH4)3SnF7 at atmospheric pressure and in (NH4)3TiF7 at p ˃ 0.4 GPa are characterized by rather low thermal hysteresis, δT0 = 1 K, and a great entropy change, ΔSBCE = 110–152 J (kg · K)−1, depending on the size of the central atom. At above 300–350 K, a contribution to BCE associated with the regular thermal expansion of the crystal lattice becomes comparable to entropy and temperature changes under pressure in the region of the phase transitions. An analysis of the absolute, relative and integral barocaloric characteristics of (NH4)3M4+F7 compounds showed their high competitiveness with respect to other barocaloric materials considered as promising solid-state refrigerants.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660074 Krasnoyarsk, Russia
Institute of Engineering Systems and Energy, Krasnoyarsk State Agrarian University, 660049 Krasnoyarsk, Russia
Institute of Chemistry, Far Eastern Department of RAS, 690022 Vladivostok, Russia

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Laptash, N. M.
}
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6.


   
    Highly efficient and thermostable far-red phosphor for promoting root growth in plants / Sh. Ouyang, J. Yin, L. Su [et al.] // J. Mater. Chem. C. - 2024. - Vol. 12, Is. 9. - P. 3272-3279, DOI 10.1039/D3TC02823B. - Cited References: 59. - The authors would like to gratefully acknowledge funds from the National Natural Science Foundation of China (Grant No. 51974123), the Key R&D Projects in Hunan Province (2021SK2047, 2022NK2044), the Natural Science Foundation of Hunan Province, China (Grant No. 2021JJ40261), the Wangcheng Science and Technology Plan (KJ221017), the Science and Technology Innovation Program of Hunan Province (2022WZ1022) and Superior Youth Project of the Science Research Project of Hunan Provincial Department of Education, (22B0211) and the Russian Federation as part of World-class Research Center Program: "Advanced Digital Technologies", contract no. 075-15-2020-935 . - ISSN 2050-7526. - ISSN 2050-7534
   Перевод заглавия: Высокоэффективный и термостабильный инфракрасный люминофор для стимулирования роста корней растений
Аннотация: Phytochrome PFR plays a key role in plant photomorphogenesis, and its perception of far-red light is essential, but how to obtain an efficient far-red phosphor to achieve accurate light filling remains a huge challenge. In this study, Gd1−y−zAl3−x(BO3)4:xCr3+,yLu3+,zSm3+ (GAB:xCr3+,yLu3+,zSm3+) series phosphors were synthesized by a high-temperature solid-state method. By doping Lu3+, the emission intensity of Cr3+ could increase as high as 20%. With the introduction of Sm3+, the emission intensity of Cr3+ was further increased by 29%. Particularly, the emission spectra can be tuned by varying the concentration ratio of Sm3+ and Cr3+, more suitable for the absorption spectrum of PFR. Moreover, the internal quantum yield and external quantum yield of GL0.1AB:0.03Cr3+ and GL0.1AB:0.03Cr3+,0.003Sm3+ were 83.1% and 24.7% and 78.1% and 26.3%, respectively. There were high anti-thermal quenching properties in the prepared phosphors at 423 K, with 107.6% (GAB:0.03Cr3+), 103.1% (GL0.1AB:0.03Cr3+), and 102.7% (GL0.1AB:0.003Sm3+,0.03Cr3+). Finally, the phosphors were made into pc-LED devices, which can realize the adjustable orange-red and far-red luminescence and meet the needs of plant lighting applications. In the light-regulated plant growth experiment, compared with the control group, far-red light promoted root growth in plants, confirming the application potential of the prepared phosphors in indoor plant cultivation.

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Держатели документа:
School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, P. R. China
Hunan Rare Earth Metal Material Research Institute Co. Ltd, No. 108 Longyuan 2nd Road, Longping High-tech Park, Changsha, Hunan, P. R. China
Hunan Optical Agriculture Engineering Technology Research Center, Changsha 410128, P. R. China
College of Agronomy, Hunan Agricultural University, Changsha 410128, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
World-Class Research Center “Advanced Dicita Technoloaies” University of Tvumen, Russia

Доп.точки доступа:
Ouyang, Sh.; Yin, J.; Su, L.; Yao, M.; Wang, G.; Yang, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhou, Zh.; Zhang, S.; Xia, M.
}
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7.


    Korshunov, M. M.
    Superconducting order parameter structure in the nematic phase of iron-based materials / M. M. Korshunov, Yu. N. Togushova // JETP Lett. - 2024. - Vol. 119, Is. 4. - P. 310-315, DOI 10.1134/S0021364024600046. - Cited References: 28 . - ISSN 0021-3640. - ISSN 1090-6487
Аннотация: We consider the effect of the nematic order on the formation of the superconducting state in iron pnictides and chalcogenides. Nematic order with the B2g symmetry is modelled as the d-type Pomeranchuk instability and treated within the mean-field approach. Calculated nematic order parameter depends on the nematic interaction coefficient and abruptly changes with the coefficient’s increase. The superconducting solution is obtained within the spin-fluctuation pairing theory. We show that the leading solution in the nematic phase has a sπ± structure. From the critical temperature Tc estimations, we conclude that the nematic superconducting state of the sπ± type is more favorable than the usual s± and dx2-y2 type states appearing in the absence of the nematicity.

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Публикация на русском языке Коршунов, Максим Михайлович. Структура сверхпроводящего параметра порядка в нематической фазе соединений железа [Текст] / М. М. Коршунов, Ю. Н. Тогушова. - 6 с. // Письма в ЖЭТФ. - 2024. - Т. 119 Вып. 4. - С. 302-307

Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Togushova, Yu. N.; Коршунов, Максим Михайлович
}
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8.


   
    Magnetic anisotropy and ferromagnetic resonance in inhomogeneous demagnetizing fields near edges of thin magnetic films / P. N. Solovev, B. A. Belyaev, N. M. Boev [et al.] // J. Phys. Condens. Matter. - 2024. - Vol. 36, Is. 19. - Ст. 195803, DOI 10.1088/1361-648X/ad258c. - Cited References: 38 . - ISSN 0953-8984. - ISSN 1361-648X
Кл.слова (ненормированные):
edge domain -- demagnetizing fields -- demagnetizing fields -- film edges -- magnetic anisotropy -- magnetization dynamics
Аннотация: Using local ferromagnetic resonance spectroscopy, we have studied the magnetic properties near edges of thin tangentially magnetized permalloy films, in which a well-defined uniaxial magnetic anisotropy was induced perpendicular to one of the edges. In the experiment, two samples with thicknesses of 90 and 300 nm and with slightly different compositions were examined. To explain the magnetization dynamics near edges, we propose a simple yet effective model of a film in the form of a rectangular prism, which yields the modified Kittel formula for the resonance frequency. In this formula, the locally averaged distance-dependent demagnetizing field that emerges near the edges is included as an additional uniaxial anisotropy term. The measurements reveal that at a certain distance from the edge, the resulting (apparent) anisotropy, determined from the angular dependencies of the resonance field, almost vanishes. Moreover, its easy axis reorients to become parallel to the edge. The model predictions agree well with these results, proving that the main resonance mode behavior near the film edges can be accurately described by introducing additional effective uniaxial anisotropy, provided the measuring area is relatively large. However, for the thick (300 nm) sample, additional precession modes are also observed. These modes distort the angular dependence of the main mode, thus demonstrating the limitations of the model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, 660036 Krasnoyarsk, Russia
Siberian Federal University, 79 Svobodny pr., 660041 Krasnoyarsk, Russia

Доп.точки доступа:
Solovev, P. N.; Соловьев, Платон Николаевич; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Skomorokhov, G. V.; Скоморохов, Георгий Витальевич; Izotov, A. V.; Изотов, Андрей Викторович
}
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9.


   
    Magnetic interparticle interactions and superparamagnetic blocking of powder systems of biogenic ferrihydrite nanoparticles / A. A. Krasikov, Yu. V. Knyazev, D. A. Balaev [et al.] // J. Exp. Theor. Phys. - 2023. - Vol. 137, Is. 6. - P. 903-913, DOI 10.1134/S1063776123120075. - Cited References: 58. - This study was supported by the Russian Science Foundation, project no. 22-72-00134 . - ISSN 1063-7761. - ISSN 1090-6509
Аннотация: The magnetic-field dependence of the superparamagnetic-blocking temperature TB of systems of antiferromagnetically ordered ferrihydrite nanoparticles has been investigated and analyzed. We studied two powder systems of nanoparticles: particles of “biogenic” ferrihydrite (with an average size of 2.7 nm), released as a result of vital functions of bacteria and coated with a thin organic shell, and particles of biogenic ferrihydrite subjected to low-temperature annealing, which cause an increase in the average particle size (to 3.8 nm) and burning out of the organic shell. The character of the temperature dependences of magnetization, measured after cooling in a weak field, as well as the shape of the obtained dependences TB(H), demonstrate peculiar features, indicating the influence of magnetic interparticle interactions. A detailed analysis of the dependences TB(H) within the random magnetic anisotropy model made it possible to estimate quantitatively the intensity of magnetic particle–particle interactions and determine the magnetic anisotropy constants of individual ferrihydrite particles.

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Публикация на русском языке Магнитные межчастичные взаимодействия и суперпарамагнитная блокировка порошковых систем наночастиц биогенного ферригидрита [Текст] / А. А. Красиков, Ю. В. Князев, Д. А. Балаев [и др.]. - 13 с. // Журн. эксперим. и теор. физ. - 2023. - Т. 164 Вып. 6. - С. 1026-1038

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Akademgorodok, Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Krasikov, A. A.; Красиков, Александр Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Balaev, D. A.; Балаев, Дмитрий Александрович; Stolyar, S. V.; Столяр, Сергей Викторович; Ladygina, V. P.; Balaev, A. D.; Балаев, Александр Дмитриевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
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10.


   
    Magneto-optical ellipsometry of thin films with optical uniaxial anisotropy / O. A. Maximova, S. A. Lyaschenko, S. N. Varnakov [et al.] // Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 14. - P. 1654-1661, DOI 10.1134/S0031918X23601385. - Cited References: 31. - The research was performed at the Magnetic MAX Materials Laboratory of the Kirensky Institute of Physics SB RAS (created under Megagrant project (agreement no. 075-15-2019-1886) with the financial support of the Russian Science Foundation no. 21-12-00226, http://rscf.ru/project/21-12-00226/ . - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
principal refractive indices -- uniaxial anisotropy -- permittivity -- magneto-optical parameter -- ellipsometry
Аннотация: In this paper, we solve the inverse problem of magneto-optical ellipsometry for thin ferromagnetic films with optical uniaxial anisotropy. We work within the framework of the approach we developed earlier analyzing magnetoellipsometric data without using fourth-order M-matrices. We work with ellipsometric relations, in which we take into account the magneto-optical contribution as perturbations, and ellipsometric measurements are carried out on a setup with a simple dipole scheme based on the transverse magneto-optical Kerr effect. We add the magneto-optical response to the expressions known in the literature for the reflection coefficients of anisotropic thin films, which are related to the parameters measured by magneto-optical ellipsometry. As a result, by analyzing the obtained expressions for the reflection coefficients, we obtain information on the total permittivity tensor of a thin film.

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

Доп.точки доступа:
Maximova, O. A.; Максимова, Ольга Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Andryushchenko, T. A.; Андрющенко, Татьяна Александровна
}
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