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Bulgakov, E. N.
Bound states in the continuum in dielectric resonators embedded into metallic waveguide / E. N. Bulgakov, A. S. Pilipchuk, A. F. Sadreev // All-dielectric nanophotonics / ed.: A. S. Shalin [et al.] : Elsevier, 2023. - Chapt. 7. - P. 185-212. - (Nanophotonics series). - Cited References: 97. - РНФ № 22-12-00070

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

Доп.точки доступа:
Shalin, A. S. \ed.\; Valero, Adrià Canós \ed.\; Miroshnichenko, A. \ed.\; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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    Soft photonic crystals and metamaterials / ed., pref.: I. V. Timofeev, W. Lee, Special issue of the "Materials" (ISSN 1996-1944) 2022, 15(22), 8096. - Bazel[etc.] : MDPI, 2022. - VII, 127 p. - ISBN 978-3-0365-6074-8. - ISBN 978-3-0365-6073-1 : Б. ц.
Перевод заглавия: Мягкие фотонные кристаллы и метаматериалы
Публикация в журнале . - [S. l. : s. n.]
. - [S. l. : s. n.]
. - [S. l. : s. n.]
. - [S. l. : s. n.]
    Содержание:
Timofeev, I. V. Special issue: Soft photonic crystals and metamaterials : Reprinted from: Materials 2022, 15, 8096, doi:10.3390/ma15228096 / I. V. Timofeev, W. Lee. - P .1-4. - Cited References: 10
Bikbaev, R. G. Double-resolved beam steering by metagrating-based Tamm plasmon polariton : Reprinted from: Materials 2022, 15, 6014, doi:10.3390/ma15176014 / R. G. Bikbaev, D. N. Maksimov, K. - P. Chen, I. V. Timofeev. - P .89-95
Другие авторы: Maksimov D. N., Chen K. - P., Timofeev I. V.
Avdeeva, A. Yu. Chiral optical Tamm states at the interface between a Dye-doped cholesteric liquid crystal and an anisotropic mirror : Reprinted from: Materials 2020, 13, 3255, doi:10.3390/ma13153255 / A. Yu. Avdeeva, S. Ya. Vetrov, R. G. Bikbaev [et al.]. - P .109-118. - Cited References: 44
Другие авторы: Vetrov S. Ya., Bikbaev R. G., Pyatnov M. V., Rudakova N. V., Timofeev I.V.
Lin, M. -Y. Chiral-selective Tamm plasmon polaritons : Reprinted from: Materials 2021, 14, 2788, doi:10.3390/ma14112788 / M. -Y. Lin, W. -H. Xu, R. G. Bikbaev [et al.]. - P .119-127. - Cited References: 46
Другие авторы: Xu W. -H., Bikbaev R. G., Yang J.-H., Li C. -R.
   Перевод заглавия: Мягкие фотонные кристаллы и метаматериалы

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Публикация в журнале Chiral optical Tamm states at the interface between a Dye-doped cholesteric liquid crystal and an anisotropic mirror [Текст] / A. Yu. Avdeeva, S. Ya. Vetrov, R. G. Bikbaev [et al.] // Materials. - 2020. - Vol. 13 Is. 15.- Ст.3255

Chiral-selective Tamm plasmon polaritons [Текст] / M.-Y. Lin, W.-H. Xu, R. G. Bikbaev [et al.] // Materials. - 2021. - Vol. 14 Is. 11.- Ст.2788

Double-resolved beam steering by metagrating-based Tamm plasmon polariton [Текст] / R. G. Bikbaev, D. N. Maksimov, K.-P. Chen, I. V. Timofeev // Materials. - 2022. - Vol. 15 Is. 17.- Ст.6014

Timofeev I. V. Special issue: Soft photonic crystals and metamaterials [Текст] / I. V. Timofeev, W. Lee // Materials. - 2022. - Vol. 15 Is. 22.- Ст.8096

Держатели документа:
Kirensky Institute of Physics FRC KSC SB RAS
Siberian Federal University
National Yang Ming Chiao Tung University Tainan Taiwan

Доп.точки доступа:
Timofeev, I. V. \ed., pref.\; Тимофеев, Иван Владимирович; Lee, Wei \ed., pref.\; Timofeev, I. V.; Pyatnov, M. V.; Rudakova, N. V.; Yang, J. -H.; Li, C. -R.
Свободных экз. нет}
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Bulgakov, E. N.
On bound states in the continuum in dielectric gratings / M. Balyzin [et al.] // The 9th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META’18) : Program / spec. sess. org. A. F. Sadreev [et al.]. - 2018. - Session 4A3: Fano Resonances in Optics and Microwaves: Physics and Application II. - P. 71. - Материалы конференции публикуются в журналах: Nanophotonics, Applied Physics A, Optical Materials Express, Advanced Electromagnetics
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum(BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.

Материалы конференции,
Материалы конференции

Доп.точки доступа:
Sadreev, A. F. \spec. sess. org.\; Садреев, Алмаз Фаттахович; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; International Conference on Metamaterials, Photonic Crystals and Plasmonics(9 ; 2018 ; June 24 - July 1 ; Marseille, France)
}
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Sadreev, A. F.
Near bound states in the radiation continuum in circulararray of dielectric rods / A. F. Sadreev // International Conference on Nanophotonics and Metamaterials(METANANO 2018). - 2018

Материалы конференции

Доп.точки доступа:
Садреев, Алмаз Фаттахович; International Conference on Nanophotonics and Metamaterials(3 ; 2018 ; Sept. 17-21 ; Sochi, Russia)Санкт-Петербургский национальный исследовательский университет информационных технологий, механики и оптики
}
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Bulgakov, E. N.
Guiding electromagnetic waves through the bound states in the radiation continuum in novel types / E. N. Bulgakov, A. F. Sadreev // The 9th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META’18) : Program / spec. sess. org. A. F. Sadreev [et al.]. - 2018. - Session 4A10: Fano Resonances in Optics and Microwaves: Physics and Application III. - P. 78. - Материалы конференции публикуются в журналах: Nanophotonics, Applied Physics A, Optical Materials Express, Advanced Electromagnetics

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Материалы конференции

Доп.точки доступа:
Sadreev, A. F. \spec. sess. org.\; Садреев, Алмаз Фаттахович; Sadreev, A. F.; International Conference on Metamaterials, Photonic Crystals and Plasmonics(9 ; 2018 ; June 24 - July 1 ; Marseille, France)
}
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Local properties of HoFe3(BO3)4 single crystal in the excited 5F5 states of Ho3+ ion at reorientation magnetic transitons / A. V. Malakhovskii [et al.] // "Spin Waves 2018", International Symposium : abstracts. - 2018. - P. 183

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Материалы конференции

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Gudim, I. A.; Гудим, Ирина Анатольевна; International Symposium on Spin Waves(2018 ; Jun. ; 3-8 ; Saint Petersburg); Физико-технический институт им. А.Ф. Иоффе РАН
}
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Kolovsky, A. R.
Wannier-Stark states and topological phase transitions in tilted two-dimensional bipartite lattices / A. R. Kolovsky // Humboldt Kolleg. Controlling quantum matter: From ultracold atoms to solids : conference materials. - 2018

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Доп.точки доступа:
Коловский, Андрей Радиевич; Controlling quantum matter: From ultracold atoms to solids, Humboldt Kolleg(2018 ; July 29 - August 2 ; Vilnius, Lithuania)Vilnius University; Lithuanian Physical Society
}
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Sadreev, A. F.
Tuning of fano resonance by waveguide rotation: Wave faucet and bound states in the continuum / A. Sadreev, A. S. Pilipchuk, A. A. Pilipchuk // Fano Resonances in Optics and Microwaves: Physics and Applications / ed.: E. Kamenetskii, A. Sadreev, A. Miroshnichenko : Springer, 2018. - Vol. 219. - P. 497-525. - (Springer Series in Optical Sciences ; Vol. 219), DOI 10.1007/978-3-319-99731-5_21. - Cited References: 52. - This work has been supported by RFBR through Grant 17-02-00440. A. S. acknowledges discussions with E. N. Bulgakov, D. N. Maksimov, H. Schanz, P. Seba, L. Sirko, H.-J. Stöckmann and Shubo Wang.
Аннотация: We consider acoustic wave transmission in a non-axisymmetric waveguide composed of a cylindrical resonator of radius R and length L and two cylindrical waveguides of radius rR. The center lines of the waveguides are shifted relative to the center line of the resonator by a distance r0 and relative to each other by an azimuthal angle Δϕ. Under variation of L and fixed Δϕ we find bound states in the continuum (trapped modes) due to full destructive interference of resonant modes leaking into waveguides. Rotation by the angle Δϕ brings complex phases into the coupling strengths of the resonator eigenmodes with propagating modes of the waveguides. As the result interference of neighboring resonances strongly depends on rotation of the waveguide introducing novel way for tuning Fano resonances. In turn rotation of the input waveguide strongly affect the acoustic transmission through the resonator imitating a faucet in wave transmission. Under variation of Δϕ and fixed L we find symmetry protected trapped modes. For Δϕ≠0 these trapped modes contribute to the scattering function supporting high vortical acoustic intensity spinning inside the resonator.

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

Доп.точки доступа:
Kamenetskii, E. \ed.\; Sadreev, A. F. \ed.\; Садреев, Алмаз Фаттахович; Miroshnichenko, A. \ed.\; Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Pilipchuk, A. A.; Пилипчук, Алина Андреевна
}
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    Electronic states of the iron ions in the oxygen deficient perovskite Gd0.2Sr0.8FeO3-δ / Yu. V. Knyazev [и др.] // Мёссбауэровская спектроскопия и её применения : сб. материалов XV международной конференции. - Ростов-на-Дону, 2018. - С. 45 . - ISBN 978-5-9275-2831-8
   Перевод заглавия: Электронные состояния ионов железа в перовските Gd0.2Sr0.8FeO3-δ

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Материалы конференции

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Solovyov, L. A.; Соловьев, Леонид Александрович; Verechschagin, S. N.; Burkov, A. T.; Novikov, S. V.; Мёссбауэровская спектроскопия и её применения, международная конференция(15 ; 2018 ; сент ; 10-16 ; Сочи); Mössbauer Spectroscopy and Applications, International Conference(15 ; 2018 ; Sept. ; 10-16 ; Sochi); Южный федеральный университет; МИРЭА-Российский технологический университет; Российская академия наук; Институт кристаллографии им. А.В. Шубникова РАН; Федеральный научно-исследовательский центр "Кристаллография и фотоника" РАН; Московский государственный университет им. М.В. Ломоносова
}
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10.

Kolovsky, A. R.
Wannier-Stark states in two dimensions / A. R. Kolovsky // International conference on quantum optics : book of abstracts . - 2018. - P. 52
Аннотация: Wannier-Stark states are the second after Bloch waves fundamental states of a quantum particle in a lattice. These states are well understood in one dimen- sion but their extension into two dimensions continues to surprise researches. In the talk I briefly review main properties of Wannier-Stark states of a quan- tum particle in ‘ordinary’ two-dimensional lattices and then highlight recent results for lattices with flat Bloch bands, where Wannier-Stark states possess interesting topological properties.

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Доп.точки доступа:
Коловский, Андрей Радиевич; International Conference on Quantum Optics(2018 ; Feb. 25 - Mar. 3 ; Obergurgl, Tirol, Austria)
}
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11.

Bulgakov, E. N.
Avoided crossings and bound states in the continuum in low-contrast dielectric gratings / E. N. Bulgakov, D. N. Maksimov // Phys. Rev. A. - 2018. - Vol. 98, Is. 5. - Ст. 053840, DOI 10.1103/PhysRevA.98.053840. - Cited References: 49. - This work was supported by Ministry of Education and Science of the Russian Federation (State Contract No. 3.1845.2017/4.6). We are grateful to K. N. Pichugin for assistance with the computations. . - ISSN 2469-9926. - ISSN 2469-9934

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
RESONANCES
Аннотация: We consider bound states in the continuum (BICs) in low-contrast dielectric gratings. It is demonstrated that the BICs originate from the reduced guided modes on the effective dielectric slab with the permittivity equal to the average permittivity of the dielectric grating. In the case of isolated resonances, the positions of BICs can be found from two-wave dispersion relationships for guided leaky modes. In the case of the degeneracy between the two families of leaky modes, the system exhibits an avoided crossing of resonances. In the spectral vicinity of the avoided crossing the transmittance as well as the emergence of BICs is described in the framework of the generic formalism by Volya and Zelevinsky [Phys. Rev. C 67, 054322 ( 2003)] with a single fitting parameter.

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Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation [3.1845.2017/4.6]
}
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12.

Coupled chiral optical Tamm states in cholesteric liquid crystals / M. V. Pyatnov [et al.] // Photonics. - 2018. - Vol. 5, Is. 4. - Ст. 30, DOI 10.3390/photonics5040030. - Cited References: 38. - This research was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund, to the research Project Nos. 17-42-240464 and 18-42-243025. . - ISSN 2304-6732
Кл.слова (ненормированные):
Cholesteric liquid crystal -- Optical Tamm states -- Localization -- Transmission spectrum -- Optical devices
Аннотация: The modes formed by two coupled chiral optical Tamm states localized at the interfaces between a photonic cholesteric liquid crystal conjugated with polarization-preserving anisotropic mirrors have been analytically and numerically investigated. These modes are only excited at the diffracting polarization of incident light. As the cholesteric layer thickness decreases, the spectral splitting of the localized state frequency is predicted. The splitting value depends on the crystal layer thickness. At the nondiffracting circular polarization, the localized modes are not excited, and the system becomes similar to the Fabry-Perot cavity containing an anisotropic helical structure.

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Держатели документа:
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center, 'Krasnoyarsk Scientific Center, RussianAcademy of Sciences, Siberian Branch', Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Pyatnov, M. V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Rudakova, N. V.
}
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13.

Estimation of the thermal and photochemical stabilities of pheromones / F. N. Tomilin [et al.] // J. Mol. Model. - 2018. - Vol. 24, Is. 11. - Ст. 323, DOI 10.1007/s00894-018-3859-5. - Cited References: 35. - This study was supported by the Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 16-44-243019 and the Russian Foundation for Basic Research, project no. 15-02-06869 and no. 16-04-00132. . - ISSN 1610-2940
Кл.слова (ненормированные):
Kinetic stability -- Atomic structure -- Density functional theory -- Excited states -- Terpenes
Аннотация: The correlation between the kinetic stability of molecules against temperature and variations in their geometric structure under optical excitation is investigated by the example of different organic pheromone molecules sensitive to temperature or ultraviolet radiation using the density functional theory. The kinetic stability is determined by the previously developed method based on the calculation of the probability of extension of any structural bond by a value exceeding the limit value Lмах corresponding to the breaking of the bond under temperature excitation. The kinetic stability calculation only requires the eigenfrequencies and vibrational mode vectors in the molecule ground state to be calculated, without determining the transition states. The weakest bonds in molecules determined by the kinetic stability method are compared with the bond length variations in molecules in the excited state upon absorption of light by a molecule. Good agreement between the results obtained is demonstrated and the difference between them is discussed. The universality of formulations within both approaches used to estimate the stability of different pheromone molecules containing strained cycles and conjugated, double, and single bonds allows these approaches to be applied for studying other molecules.

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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
Federal Research Center KSC SB RAS, International Scientific Center for Extreme Organism States Research, Krasnoyarsk, 660036, Russian Federation
Sukachev Institute of Forest, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Tomilin, F. N.; Томилин, Феликс Николаевич; Fedorov, A. S.; Федоров, Александр Семенович; Artyushenko, P. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Ovchinnikova, T. M.; Tsikalova, P. E.; Soukhovolsky, V. G.
}
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14.

Bulgakov, E. N.
Fibers based on propagating bound states in the continuum / E. Bulgakov, A. Sadreev // Phys. Rev. B. - 2018. - Vol. 98, Is. 8. - Ст. 085301, DOI 10.1103/PhysRevB.98.085301. - Cited References: 40. - The authors thank D. N. Maksimov for assistance and discussions. This work was partially supported by the Ministry of Education and Science of Russian Federation (State Contract No. 3.1845.2017) and the RFBR Grants No. 16-02-00314 and No. 17-52-45072. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Physics, Condensed Matter
Рубрики:
PHOTONIC CRYSTAL SLABS
   LIGHT
   RESONANCES
   RADIATION
   ARRAYS
Аннотация: We show that a circular periodic array of silicon dielectric cylinders supports nearly bound states in the continuum (BICs) propagating along the cylinders. These propagating nearly BICs with extremely large-Q factors are surrounded by resonant modes weakly leaking into the radiation continuum. We present leaky zones in the form of dispersion curves for complex eigenfrequencies dependent on propagation constant kz, with the wave vector directed along the cylinders in the vicinity of different types of BICs. Symmetry-protected nearly BICs have the resonant width proportional to squared propagation constant Γ∼k2z; the widths of non-symmetry-protected nearly BICs behave as Γ∼(kz−kc)2, where kc and non-symmetry-protected nearly BICs have the resonant width proportional to k4z. The latter propagating nearly BICs can serve for the transmission of a electromagnetic signal paving a way to a different type of optical fiber. We also demonstrate weakly leaking resonant modes which carry orbital angular momentum.

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Держатели документа:
Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; Ministry of Education and Science of Russian Federation [3.1845.2017]; RFBR [16-02-00314, 17-52-45072]
}
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15.

Chiral optical Tamm states: method of images / I. V. Timofeev [et al.] // Int. conf. "Days on diffraction" : Abstracts. - 2018. - P. 216-217

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Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Pankin, P. S.; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Lee, W.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; "Days on diffraction", International conference(2018 ; June ; 4-8 ; St. Petersburg); Санкт-Петербургское отделение Института математики им. В. А. Стеклова; Санкт-Петербургский государственный университет; Euler International Mathematical Institute; Российский фонд фундаментальных исследований
}
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16.

Lyapina, A. A.
Bound states with orbital angular momentum in the continuum of cylindrical non-axisymmetric waveguide / A. A. Lyapina, A. S. Pilipchuk, A. F. Sadreev // Ann. Phys. - 2018. - Vol. 396. - P. 56-70, DOI 10.1016/j.aop.2018.05.020. - Cited References: 28. - This work has been supported by RFBR Grant 17-02-00440 . We thank D.N. Maksimov for discussions. . - ISSN 0003-4916
Кл.слова (ненормированные):
Acoustic wave transmission -- Spinning trapped modes with orbital angular momentum
Аннотация: We consider acoustic wave transmission in a non-axisymmetric waveguide which consists of a cylindrical resonator of radius R and length L and two cylindrical waveguides of radius r
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Держатели документа:
Kirensky Institute of Physics, Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Pilipchuk, A. S.; Пилипчук, Артем Сергеевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Ляпина, Алина Андреевна
}
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17.

Samoshkina, Yu. E.
Electronic and magnetic states of Pr and Mn in the Pr1–xSrxMnO3 films studied by XANES and XMCD spectroscopy / Y. E. Samoshkina, A. Rogalev // J. Exp. Theor. Phys. - 2018. - Vol. 126, Is. 5. - P. 660-665, DOI 10.1134/S1063776118040131. - Cited References: 35. - We thank V.I. Chichkov and N.V. Andreev (National University of Science and Technology MISiS) for the preparation of the manganite films. - This work was supported by the Russian Foundation for Basic Research (project no. 16-32-00209 mol_a) and a grant of the President of the Russian Federation (NSh-7559.2016.2). . - ISSN 1063-7761
Кл.слова (ненормированные):
Circular dichroism spectroscopy -- Dichroism -- Film growth -- Magnetic moments -- Manganese -- Praseodymium -- Strontium compounds -- X ray absorption
Аннотация: The spectral dependences of X-ray absorption near-edge spectroscopy (XANES) and X-ray magnetic circular dichroism (XMCD) and the field dependences of XMCD near the K edge of Mn and the L2,3 edges of Pr in the Pr0.8Sr0.2MnO3 and Pr0.6Sr0.4MnO3 films at T = 90 K are studied. The spectral dependences point to a mixed valence state of Mn and Pr in the films. It is found that, as compared to XANES, XMCD is more sensitive to the valence state of Pr4+. The field dependences of XMCD point to ferromagnetic behavior of Mn ions and the Van Vleck paramagnetism of Pr ions, which makes a significant contribution to the total magnetization of the films. It is shown that as the Sr concentration increases, the XMCD intensity at the K edge of Mn increases, which indicates a growth of the total magnetic moment of the film due to an increase in the 4p–3d hybridization.

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Публикация на русском языке Самошкина, Юлия Эрнестовна. Электронные и магнитные состояния Pr и Mn в пленках Pr1-xSrxMnO3 по данным спектроскопии XANES и XMCD [Текст] / Ю. Э. Самошкина, А. Л. Рогалев // Журн. эксперим. и теор. физ. - 2018. - Т. 153 Вып. 5. - С. 794-799

Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,” Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
European Synchrotron Radiation Facility, Grenoble, CS, France

Доп.точки доступа:
Rogalev, A.; Самошкина, Юлия Эрнестовна
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18.

The alternating-sign magnetoresistance of polycrystalline manganese chalcogenide films / S. S. Aplesnin [et al.] // Semicond. Sci. Technol. - 2018. - Vol. 33, Is. 8. - Ст. 085006, DOI 10.1088/1361-6641/aace44. - Cited References: 33. - The reported study was funded by Russian Foundation for Basic Research (RFBR) according to the research project No 18-52-00009 Bel_a; No 18-32-00079 mol_a; No 18-42-240001 r_a; the state order No 3.5743.2017/6.7. . - ISSN 0268-1242. - ISSN 1361-6641

РУБ Engineering, Electrical & Electronic + Materials Science,
Рубрики:
NEUTRON-SCATTERING
   SURFACE-STATES
   MNTE
   CONDUCTIVITY
   MECHANISM
Кл.слова (ненормированные):
polycrystalline films -- magnetoresistance -- impedance -- polaron -- magnetic -- properties -- thermoelectric
Аннотация: The correlation between the dc and ac electrical resistance and the structural, magnetic, and thermoelectric properties of polycrystalline MnSe1−X Te Х (0.3 ≤ X ≤ 0.4) manganese chalcogenide films in the temperature range of 80–400 K has been investigated. Inhomogeneous electronic states and transitions between them accompanied by structural lattice deformations have been found at temperatures including the Neel temperature region. The magnetic susceptibility maximum above the Neel temperature in a magnetic field of 8.6 kOe has been observed. Temperature ranges of the coexistence of two types of electrically inhomogeneous states have been established by impedance spectroscopy in the frequency range of 0.1–1000 kHz and the change of the hopping conductivity for diffusion one accompanied by the magnetic susceptibility minimum has been found. The magnetoresistance in magnetic fields of up to 12 kОе has been established. It has been revealed that the thermopower and magnetoresistance change its sign upon heating. The experimental data are explained using a spin polaron model with the localization of polarons and formation of the electron phase-separation. The alternation of magnetoresistance in sign is attributed to the ferromagnetic orbital ordering of electrons and the negative magnetoresistance is explained by suppression of spin fluctuations in a magnetic field.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akademgorodok 50,Bld 38, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarskii Rabochi Ave 31, Krasnoyarsk 660014, Russia.
Sci Pract Mat Res Ctr NAS Belarus, P Brovki Str 19, Minsk 220072, BELARUS.

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Romanova, O. B.; Романова, Оксана Борисовна; Sitnikov, M. N.; Kretinin, V. V.; Galyas, A., I; Yanushkevich, K., I; Russian Foundation for Basic Research (RFBR) [18-52-00009 Bel_a, 18-32-00079 mol_a, 18-42-240001 r_a]; [3.5743.2017/6.7]
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19.

Chiral optical Tamm states at the interface between a cholesteric and an all-dielectric polarization-preserving anisotropic mirror / N. V. Rudakova [et al.] // Abstracts of 27th International Liquid Crystal Conference (ILCC 2018). - 2018. - Ст. 4-D-12. - Cited References: 3

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Доп.точки доступа:
Rudakova, N. V.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Bikbaev, R. G.; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Lee, W.; International Liquid Crystal Conference(27 ; 2018 ; July ; 22-27 ; Kyoto, Japan)
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20.

Bulgakov, E. N.
Optical response induced by bound states in the continuum in arrays of dielectric spheres / E. N. Bulgakov, D. N. Maksimov // J. Opt. Soc. Am. B. - 2018. - Vol. 35, Is. 10. - P. 2443-2452, DOI 10.1364/JOSAB.35.002443. - Cited References: 51. - Ministry of Education and Science of the Russian Federation (Minobrnauka) (State Contract N 3.1845.2017); Russian Foundation for Basic Research (RFBR) (16-02-00314). . - ISSN 0740-3224. - ISSN 1520-8540

РУБ Optics
Рубрики:
COUPLED-MODE THEORY
   LIGHT LINE
   ENHANCEMENT
   TRANSMISSION
   TRANSITION
Аннотация: We consider an optical response induced by bound states in the continuum (BICs) in arrays of dielectric spheres. By combining the quasi-mode expansion technique with coupled mode theory (CMT), we put forward a theory of the optical response by high-Q resonance surrounding BICs in momentum space. The central results are analytical expressions for the CMT parameters, which can be easily calculated from the eigenfrequencies and eigenvectors of the interaction matrix of the scattering systems. The results obtained are verified in comparison against exact numerical solutions to demonstrate that the CMT approximation is capable of reproducing Fano features in the spectral vicinity of the BIC. Based on the quasi-mode expansion technique, we derived the asymptotic scaling law for the CMT parameters in the vicinity of the Γ-point. It is rigorously demonstrated that the linewidth in the CMT approximation exhibits different asymptotic behavior depending on the symmetry of the BIC.

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Держатели документа:
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Maksimov, D. N.; Максимов, Дмитрий Николаевич; Булгаков, Евгений Николаевич; Ministry of Education and Science of the Russian Federation (Minobrnauka) [N 3.1845.2017]; Russian Foundation for Basic Research (RFBR) [16-02-00314]
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