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A raman study of hydrostatic pressure induced phase transitions in Rb2KInF6 crystals / A. N. Vtyurin [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 5. - P. 934-936, DOI 10.1134/S1063783412050472. - Cited References: 16. - This study was supported by the Russian Foundation for Basic Research (project nos. 11-02-98002-r_sibir' and 09-02-00062), the Siberian Branch of the Russian Academy of Sciences (integration project no. 101), and the Council on Grants from the President of the Russian Federation (grant no. HSh-4645.2010.2). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
LATTICE-DYNAMICS
ELPASOLITES
SPECTRA
Аннотация: The Raman spectra of the elpasolite (Rb2KInF6) crystal have been studied in the pressure range from 0 to 5.3 GPa at a temperature of 295 K. A phase transition at a pressure of approximately 0.9 GPa has been found. An analysis of the variations in the spectral parameters has led to the conclusion that the phase transition to a distorted phase is accompanied by the doubling of the volume of the primitive cell of the initial cubic phase. Numerical calculations of the lattice dynamics in the Rb2KInF6 crystal have been performed. The numerical simulation has established that the phase transition at a pressure of 0.9 GPa is associated with condensation of the F (lg) mode. A probable high-pressure phase is the phase with space group C2/m.

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Публикация на русском языке Исследование фазовых переходов в кристалле Rb2KInF6, индуцированных гидростатическим давлением, методом комбинационного рассеяния света // Физика твердого тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54, Вып. 5. - С. 880-882. - ISSN 0367-3294

Держатели документа:
[Vtyurin, A. N.
Krylov, A. S.
Krylova, S. N.
Oreshonkov, A. S.
Voronov, V. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Goryainov, S. V.] Russian Acad Sci, Siberian Branch, Inst Mineral & Petrog, Novosibirsk 630090, Russia

Доп.точки доступа:
Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич; Goryainov, S. V.; Горяйнов, Сергей Владимирович; Krylova, S. N.; Крылова, Светлана Николаевна; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Voronov, V. N.; Воронов, Владимир Николаевич
}
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A study of the synthesis products of fullerenes with nickel and cobalt / E. A. Petrakovskaya [et al.] // Tech. Phys. - 2001. - Vol. 46, Is. 1. - P. 42-46, DOI 10.1134/1.1340883. - Cited References: 15 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
COMPLEXES
SPECTRA
Аннотация: Qualitative analysis of the products of plasmochemical synthesis of fullerenes with metallic nickel and cobalt has been carried out using electron paramagnetic resonance (EPR) and electron microscopy. These studies show that the synthesis products are mainly fullerenes, metallic nanoparticles coated with an insulating layer, and isolated atomic clusters. (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Branch, RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Bulina, N. V.; Булина, Наталья Васильевна; Churilov, G. N.; Чурилов, Григорий Николаевич; Puzyr', A. P.
}
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    Absorption spectra of PrF3 crystal / A. A. Ershov [и др.] // The Second Rus.-China Workshop on Dielectic and Ferroel. Mater. : program. - 2015. - Ст. P6.3. - P. 82
   Перевод заглавия: Спектры поглощения кристалла PrF3

Материалы конференции

Доп.точки доступа:
Ershov, A. A.; Ершов, Александр Андреевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Russia-China workshop on dielectric and ferroelectric materials(2 ; 2015 ; sept. ; 11 - 14 ; Voronezh); Российская академия наук; Воронежский государственный технический университет
}
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Absorption spectra of the purple nonsulfur bacteria light-harvesting complex: A DFT study of the B800 part / L. V. Begunovich, E. A. Kovaleva, M. M. Korshunov, V. F. Shabanov // J. Photochem. Photobiol. A: Chem. - 2024. - Vol. 450. - Ст. 115454, DOI 10.1016/j.jphotochem.2023.115454. - Cited References: 42. - This work was supported by the state assignment of the Ministry of Science and Higher Education of the Russian Federation. Authors would like to thank Information Technology Centre, Novosibirsk State University for providing access to their supercomputers. L.V.B. would like to thank Irkutsk Supercomputer Center of SB RAS for providing the access to HPC-cluster «Akademik V.M. Matrosov» (Irkutsk Supercomputer Center of SB RAS, Irkutsk: ISDCT SB RAS; http://hpc.icc.ru, accessed 20.10.2023) . - ISSN 1010-6030. - ISSN 1873-2666
Кл.слова (ненормированные):
Photosynthesis -- LH2 -- Light harvesting -- Rhodoblastus acidophilus -- Bacteriochlorophyll -- DFT -- DFTB -- Optical spectra
Аннотация: We’ve studied the B800 part of Rhodoblastus acidophilus light-harvesting complex (LH2) by several quantum chemical techniques based on the density functional theory (DFT) and determined the specific method and a minimal reliable model suitable for further studies of the LH2. In addition to bacteriochlorophyll a molecules, the minimal model includes two α and one β chain amino acids. Within the model, we are able to reproduce the contribution of the B800 ring of nine bacteriochlorophyll a molecules to the near infrared Qy absorption band. We also discuss the use of hybrid DFT calculations for precise energy and optical estimations and DFT-based tight binding (DFTB) method for the large-scale calculations. Crucial importance of Hartree-Fock exchange interaction for the correct description of B800 peak position was shown.

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

Доп.точки доступа:
Begunovich, L. V.; Kovaleva, E. A.; Korshunov, M. M.; Коршунов, Максим Михайлович; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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ABSORPTION-SPECTRA AND FARADAY-EFFECT IN CS2NANDCL6 AND CS2NAPRCL CRYSTALS / I. S. EDELMAN [и др.] // Fiz. Tverd. Tela. - 1985. - Vol. 27, Is. 11. - P. 3467-3470. - Cited References: 8 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
EDELMAN, I. S.; GALANOV, E. K.; KOKOV, I. T.; MALAKHOVSKII, A. V.; ANISTRATOV, A. T.
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Action of the atomic and electronic structure of pheromone molecules on the effectiveness of communication in xylophagous insects / P. V. Artyushenko [et al.] // J. Struct. Chem. - 2016. - Vol. 57, Is. 2. - P. 287-293, DOI 10.1134/S0022476616020074. - Cited References:27. - This work was supported by RFBR projects Nos. 13-04-00375 and16-04-00132. . - ISSN 0022-4766. - ISSN 1573-8779

РУБ Chemistry, Inorganic & Nuclear + Chemistry, Physical
Рубрики:
Monochamus-galloprovincialis coleoptera
   Density-functional theories
   Beetle Ips-typographus
   Pine sawyer beetle
   Aggregation pheromone
   Cerambycidae
   Attraction
   Components
   Attack
   Set
Кл.слова (ненормированные):
atomic and electronic structure -- functional density methods -- absorption -- spectra -- excited states -- xylophages -- pheromones
Аннотация: The B3LYD /6-31(p,d) density functional method is applied to pheromones of the forest xylophagous insects Ips typographus L., Monochamus urussovi Fisch., and Monochamus galloprovincialis Oliv. to calculate the absorption spectra and find excited states. The calculated results are used to assess the possible activity of the molecules when they are affected by solar radiation.

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Публикация на русском языке Влияние атомной и электронной структуры молекул феромонов на эффективность коммуникации насекомых-ксилофагов [Текст] / П. В. Артюшенко [и др.] // Журн. структ. химии. - 2016. - Т. 57 № 2. - С. 304-310

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, KSC Presidium, Int Res Ctr Studies Extreme States Organism, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk, Russia.

Доп.точки доступа:
Artyushenko, P. V.; Артюшенко, Полина Владимировна; Tomilin, F. N.; Томилин, Феликс Николаевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Tsikalova, P. E.; Ovchinnikova, T. M.; Soukhovolsky, V. G.; RFBR [13-04-00375, 16-04-00132]
}
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Analysis of optical and magnetooptical spectra of Fe5Si3 and Fe3Si magnetic silicides using spectral magnetoellipsometry / S. A. Lyashchenko [et al.] // J. Exp. Theor. Phys. - 2015. - Vol. 120, Is. 5. - P. 886-893, DOI 10.1134/S1063776115050155. - Cited References:31. - This study was financially supported by the Ministry of Education and Science of the Russian Federation (state assignment no. 16.663.2014K, agreement no. 14.604.21.0002 (RFMEFI60414X0002), and contract no. 02.G25.31.0043), the Program is Support of Leading Scientific Schools (project no. NSh-2886.2014.2), and the Russian Foundation for Basic Research (project nos. 13-02-01265 and 14-02-31309). . - ISSN 1063. - ISSN 1090-6509. -

РУБ Physics, Multidisciplinary
Рубрики:
INITIO MOLECULAR-DYNAMICS
   AUGMENTED-WAVE METHOD
   FILMS
   ELLIPSOMETRY
Аннотация: The optical, magnetooptical, and magnetic properties of polycrystalline (Fe5Si3/SiO2/Si(100)) and epitaxial Fe3Si/Si(111) films are investigated by spectral magnetoellipsometry. The dispersion of the complex refractive index of Fe5Si3 is measured using multiangle spectral ellipsometry in the range of 250–1000 nm. The dispersion of complex Voigt magnetooptical parameters Q is determined for Fe5Si3 and Fe3Si in the range of 1.6–4.9 eV. The spectral dependence of magnetic circular dichroism for both silicides has revealed a series of resonance peaks. The energies of the detected peaks correspond to interband electron transitions for spin-polarized densities of electron states (DOS) calculated from first principles for bulk Fe5Si3 and Fe3Si crystals.

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Публикация на русском языке Исследование оптических и магнитооптических спектров магнитных силицидов Fe5Si3 и Fe3Si методом спектральной магнитоэллипсометрии [Текст] / С. А. Лященко [и др.] // Журн. эксперим. и теор. физ. : Наука, 2015. - Т. 147 Вып. 5. - С. 1023–1031

Держатели документа:
Reshetnikov Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Rzhanov Inst Semicond Phys, Siberian Branch, Novosibirsk 630090, Russia.
Russian Acad Sci, Inst Automat & Control Proc, Far East Branch, Vladivostok 690041, Russia.
Far Eastern State Transport Univ, Khabarovsk 680021, Russia.

Доп.точки доступа:
Lyashchenko, S. A.; Лященко, Сергей Александрович; Popov, Z. I.; Попов, Захар Иванович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Popov, E. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Kuzubov, A. A.; Кузубов, Александр Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Shamirzaev, T. S.; Latyshev, A. V.; Saranin, A. A.; Ministry of Education and Science of the Russian Federation [16.663.2014K, 14.604.21.0002 (RFMEFI60414X0002), 02.G25.31.0043]; Russian Foundation for Basic Research [13-02-01265, 14-02-31309]
}
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Analysis of the electrical and optical properties of VBO3 single crystals and Fe1-xVxBO3 solid solutions on the basis of a many-electron model of energy band structure / N. B. Ivanova [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 8. - P. 1462-1468, DOI 10.1134/1.1788779. - Cited References: 32. - One of the authors (M.M.A.) would like to thank the Deutsche Forschungsgemeinschaft (SFB608) for financial support. This study was supported by the Russian Foundation for Basic Research (project no. 03-02-16286), the program "Integration" (project no. B0017), and the program of the Division of Physical Sciences of the Russian Academy of Sciences "Strongly Correlated Electrons" . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
   CALCITE STRUCTURE
   PHASE-TRANSITION
   FERRIC BORATE
   HIGH-PRESSURE
   FEBO3
   FE1-XCRXBO3
   FERROMAGNET
   MOSSBAUER
   SPECTRA
Аннотация: A many-electron model of the energy band structure of VBO3 and of Fe1 - xVxBO3 solid solutions is proposed with strong electron correlations taken into account. Experimental optical absorption spectra and data on the resistivity are discussed in the framework of the suggested model. Variation in the magnetic and electronic properties of VBO3 and Fe1 - xVxBO3 under high pressure is predicted. For VBO3, a Mott-Hubbard (insulator-metal) transition is expected in the high-pressure phase. In Fe1 - xVxBO3 solid solutions, a nontrivial variation in the properties is predicted, leading to the appearance of a different magnetic state. (C) 2004 MAIK "Nauka / Interperiodica".

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Публикация на русском языке Анализ электрических и оптических свойств монокристаллов VBO[3] и твердых растворов Fe[1-x]V[x]BO[3] на основе многоэлектронной модели из зонной структуры [Текст] / Н. Б. Иванова [и др.] // Физ. тверд. тела. - 2004. - Т. 46 Вып. 8. - С. 1422-1427

Держатели документа:
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany
ИФ СО РАН
Krasnoyarsk State Tech. University, Krasnoyarsk, 660074, Russian Federation
II. Physikalisches Institut, Universitat zu Koln, Koln, 50937, Germany

Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Markov, V. V.; Марков, Владимир Витальевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Abd-Elmeguid, M. M.
}
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Analysis of the structure and magnetic properties of an interface in multilayered (Fe/Si) N nanostructures with the surface-sensitive XMCD method / M. S. Platunov [et al.] // JETP Letters. - 2014. - Vol. 99, Is. 12. - P. 706-711, DOI 10.1134/S002136401412011X. - Cited References: 26. - We are grateful to S.V. Komogortsev for stimulating discussions and to the management of BESSY II, Helmholtz-Zentrum Berlin, for the opportunity of performing experiments at the UE46-PGM1 beamline. This work was supported by the Russian Foundation for Basic Research (project nos. 13-02-01265a and 14-02-31051mol-a), by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh- 2886.2014.2), by the Presidium of the Russian Academy of Sciences (program no. 24.34), and by the Ministry of Education and Science of the Russian Federation (state contract no. 02.G25.31.0043 and state task for research at Siberian Federal University in 2014). . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
RAY CIRCULAR-DICHROISM
   YIELD
   SPECTRA
   Fe
Аннотация: The structural and magnetic properties of (Fe/Si) N nanostructures obtained by successive deposition on the SiO2/Si(100) surface at a temperature of the substrate of 300 K have been studied. The thicknesses of all Fe and Si layers have been determined by transmission electron microscopy measurements. The magnetic properties have been studied by the X-ray magnetic circular dichroism (XMCD) method near the Fe L 3, 2 absorption edges. The orbital (m l ) and spin (m S ) contributions to the total magnetic moment of iron have been separated. The thicknesses of magnetic and nonmagnetic iron silicide on the Si/Fe and Fe/Si interfaces have been determined with the surface sensitivity of the XMCD method and the model of the interface between the nonmagnetic and weakened magnetic phases.

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Публикация на русском языке Анализ структуры и магнитных свойств интерфейса в многослойных наноструктурах (Fe/Si)N с применением поверхностно-чувствительного метода XMCD [Текст] / М. С. Платунов [и др.] // Письма в Журн. эксперим. и теор. физ. - 2014. - Т. 99 Вып. 11-12. - С. 817-823

Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Helmholtz Zentrum Berlin, BESSY II, D-12489 Berlin, Germany

Доп.точки доступа:
Platunov, M. S.; Платунов, Михаил Сергеевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич; Weschke, E.; Schierle, E.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic Research [13-02-01265a, 14-02-31051mol-a]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools [NSh- 2886.2014.2]; Presidium of the Russian Academy of Sciences [24.34]; Ministry of Education and Science of the Russian Federation [02.G25.31.0043]
}
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10.

Analyzing the symmetry of the Raman spectra of crystals according to angular dependences / E. V. Golovkina, S. N. Krylova, A. N. Vtyurin, A. S. Krylov // Bull. Russ. Acad. Sci. Phys. - 2024. - Vol. 88, Is. 5. - P. 773-778, DOI 10.1134/S1062873824706573. - Cited References: 32. - This work was supported by the Russian Foundation for Basic Research, project no. 21-52-12018. The authors are grateful to Dr. Irena Senkovska for providing our DUT-8(Ni) samples . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
angular dependences of Raman scattering -- metal–organic framework crystals
Аннотация: The authors propose a way of reconstructing the Raman tensor by studying the angular dependences of the intensities of the Raman lines of unoriented microcrystals. The technique is verified using familiar calomel Hg2Cl2 crystals. It is shown that the lines on DUT-8 (Ni) crystals indicating phases with open and closed pores have different types of symmetries. The technique can be used to reconstruct the Raman tensor for any unoriented crystalline sample.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Golovkina, E. V.; Головкина, Елена Вячеславовна; Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич
}
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11.

Arkhipkin, V. G.
Transmission and reflection spectra of a photonic crystal with a Raman defects / V. G. Arkhipkin, S. A. Myslivets // J. Exp. Theor. Phys. - 2011. - Vol. 111, Is. 6. - P. 898-906, DOI 10.1134/S1063776110120022. - Cited References: 37. - This work was supported by the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (project no. NSh-7810.2010.3), the Presidium of the Russian Academy of Sciences (project no. 27.1), the Ministry of Education and Science of the Russian Federation (state contract no. 02.740.11.0220), and the Siberian Branch, Russian Academy of Sciences (integration project no. 5). . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
   SLOW-LIGHT
   NONLINEAR OPTICS
   MICROCAVITIES
   LASERS
   AMPLIFIER
   MODES
Кл.слова (ненормированные):
Group velocities -- High frequency HF -- Microwatts -- Nonlinear refractive index -- One dimensional photonic crystal -- Probe field -- Pump intensities -- Raman gain -- Raman resonances -- Reflection spectra -- Spectral position -- Three level atoms -- Transmission spectrums -- Defects -- Dispersion (waves) -- Probes -- Pumping (laser) -- Pumps -- Refractive index -- Resonance -- Photonic crystals
Аннотация: Features of Raman gain of probe radiation in three-level atoms placed in a defect of a one-dimensional photonic crystal in the presence of laser radiation (pump) at an adjacent high-frequency transition have been theoretically investigated. It has been shown that there is a pump intensity range where narrow peaks (resonances) simultaneously appear in the transmission and reflection spectra of the probe field. Beyond this region, the peak in the transmission spectrum is transformed to a narrow dip. The spectral position of these peaks is determined by the Raman resonance and the transmittance and reflectance can be larger than unity at pump intensities from several microwatts per square centimeter to several tens of milliwatts per square centimeter. The nature of narrow peaks is due to a sharp dispersion of a nonlinear refractive index near the Raman resonance; this dispersion is responsible for a strong decrease in the group velocity of probe radiation. The proposed scheme makes it possible to obtain controlled ultranarrow resonances in the transmission and reflection spectra of the photonic crystal.

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Оригинал на русском языке Спектры пропускания и отражения фотонного кристалла с рамановским дефектом [Текст] / В. Г. Архипкин, С. А. Мысливец // Журнал экспериментальной и теоретической физики. - Москва : Федеральное государственное унитарное предприятие "Академический научно-издательский, производственно-полиграфический и книгораспространительский центр Российской академии наук "Издательство "Наука", 2010. - Т. 138 № 6. - С. 1018-1027

Держатели документа:
[Arkhipkin, V. G.] Russian Acad Sci, Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич
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12.

Arkhipkin, V. G.
Transmission and reflection spectra of a Raman induced grating in atomic media / V. G. Arkhipkin, S. A. Myslivets // Opt. Spectrosc. - 2015. - Vol. 119, Is. 5. - P. 770-775, DOI 10.1134/S0030400X1511003X. - Cited References: 19. - This work was supported by the Russian Foundation for Basic Research, project no. 15-02-03959 . - ISSN 0030-400X

РУБ Optics + Spectroscopy
Рубрики:
ELECTROMAGNETICALLY INDUCED TRANSPARENCY
OPTICS
Аннотация: The spectral properties of an electromagnetically induced grating that is based on the spatial modulation of the Raman gain in the field of a standing pump wave in a three-level homogeneous medium have been discussed. It has been shown that, by varying the intensity or the frequency of the pump field, one can control the transmission and reflection spectra, while the transmission and reflection coefficients of the probe (Raman) wave can simultaneously be greater than unity. The influence of the nonideality of the standing wave on the spectral characteristics of the grating has been studied. © 2015, Pleiades Publishing, Ltd.

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Публикация на русском языке Архипкин, Василий Григорьевич. Спектры пропускания и отражения рамановской индуцированной решетки в атомных средах [Текст] / В. Г. Архипкин, С. А. Мысливец // Оптика и спектроскопия : Наука, 2015. - Т. 119 № 5. - С. 745-750

Доп.точки доступа:
Myslivets, S. A.; Мысливец, Сергей Александрович; Архипкин, Василий Григорьевич; International Conference “Basic Problems of Optics” (VIII ; October 20–24, 2014 ; St. Petersburg)
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13.

Atomic structure and physical properties of fused porphyrin nanoclusters / P. V. Avramov [et al.] // J. Porphyr. Phthalocyanines. - 2014. - Vol. 18, Is. 7. - P. 552-568, DOI 10.1142/S1088424614500291. - Cited References: 66. - This work was supported by JAEA Research fellowship (P. V. A.). P. V. A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. This work was supported by the Russian Scientific Foundation, Project No. 14-13-00139. Authors are grateful for Prof. S. G. Ovchinnikov for fruitful discussions. . - ISSN 1088-4246. - ISSN 1099-1409

РУБ Chemistry, Multidisciplinary
Рубрики:
AUGMENTED-WAVE METHOD
   HOLONOMIC QUANTUM COMPUTATION
   INITIO MOLECULAR-DYNAMICS
   VAPOR ABSORPTION SPECTRA
   BORON-NITRIDE NANOTUBES
   ELECTRONIC-STRUCTURE
   REDOX REACTIONS
   EXCITED-STATES
   SPIN-STATES
   GRAPHENE
Кл.слова (ненормированные):
nanoclusters -- fused porphyrins -- electronic structure -- mechanical properties
Аннотация: The atomic and electronic structures, mechanical properties and potential barriers of formation of a set of meso–meso β–β fused porphyrin/metalloporphyrin nanopages, nanotapes, nanotubes and 2D nanofabrics were studied by GGA LC-DFT technique using cluster and PBC models. The porphyrin pages of the nanoclusters are connected with each other by graphene fragments formed by meso–meso β–β links. Fusion of all the edges of six porphyrin/metalloporphyrin units produces a novel ~ 1 nm sized molecule of cubic symmetry with a hollow cage inside. It was found that all studied nanoclusters are metastable with formation energies 0.36–7.57 kcal/mol per atom. Under applied mechanical stress, the nanoclusters exhibit superelastic and ultrastrong properties with binding graphene fragments being the weakest links for mechanical rupture. Depending on the spin-dependent reaction pathways, the hollow caged nanoclusters exhibit almost zero or low potential energy barriers (1–10 kcal/mol) during the initial stages of self-assembly. All nanoclusters exibit the main features of the electronic structures of the parent porphyrins, in particular the nature of HOMO/LUMO states and the relative energetic positions of the metal d states. The induced curvature of the hollow cage nanoclusters leads to admixture of more than 2% of the dπ⊥ states to the dσ energy region and formation of vacant superatomic molecular orbitals of d character in cubic ligand field. The Fe-derived hollow-caged nanoclusters reveal extremely high spin states with small energy differences between ferromagnetic and antiferromagnetic configurations, which can be utilized for quantum holonomic computations.

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Держатели документа:
Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Tomsk State Univ, Tomsk 634050, Russia

Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Kuzubov, A. A.; Кузубов, Александр Александрович; Sakai, S.; Ohtomo, M.; Entani, S.; Matsumoto, Y.; Eleseeva, N. S.; Елисеева, Наталья Сергеевна; Pomogaev, V. A.; Naramoto, H.; JAEA Research fellowship; Russian Scientific Foundation [14-13-00139]
}
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14.

    Automated measuring system for studying ferromagnetic resonance spectra in the radio frequency range / A. V. Burmitskikh, B. A. Belyaev, N. M. Boev, S. A. Kleshnina // Ural symposium on biomedical engineering, radioelectronics and information technology (USBEREIT) : Proceedings / Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology (2021 ; May 13-14 ; Yekaterinburg (Hybrid event)) : IEEE, 2021. - P. 0267-0271DOI 10.1109/USBEREIT51232.2021.9455019. - Cited References: 13
   Перевод заглавия: Автоматизированная измерительная система для исследования спектров ферромагнитного резонанса в радиочастотном диапазоне
Аннотация: The automated system for measuring ferromagnetic resonance spectra in the radio frequency range has been developed for measuring magnetic characteristics of thin films. The system allows measuring the spectrum of ferromagnetic resonance at a frequency of 12 MHz with a field step of 0.01 Oe (constant or variable) and with 0.0125° angle resolution. Automatic determination of the anisotropy field and automatic sensitivity adjustment of the measuring system allows obtaining data from permalloy thin magnetic films samples with thickness less than 50 nm. Measurements can be carried out with different directions of external magnetic fields (in the plane of the TMF sample) and with rotation of the sample in the external magnetic field. This is achieved by the independent automatic rotation of the sample and high-frequency Helmholtz coils. Processing and transmission of the received data in the digital form provides automatic processing and representation of measurement results on the PC screen. The measurement results can be used for TMF study, assessing the quality, rejection and further use in finished devices.

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Материалы конференции,
Материалы конференции, , ,

Доп.точки доступа:
Burmitskikh, A. V.; Бурмитских, Антон Владимирович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Kleshnina, S. A.; Клешнина, Софья Андреевна; Ural Symposium on Biomedical Engineering, Radioelectronics and Information Technology(2021 ; May 13-14 ; Yekaterinburg (Hybrid event)); Уральский симпозиум IEEE по биомедицинской инженерии, радиоэлектронике и информационным технологиям(2021 ; 13-14 мая ; Екатеринбург)
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15.

Avramov, P. V.
Effects of strong electron correlations in X-ray and electron spectra of high-T-c superconductors / P. V. Avramov, S. G. Ovchinnikov // Phys. Solid State. - 2000. - Vol. 42, Is. 5. - P. 788-809, DOI 10.1134/1.1131293. - Cited References: 92 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   COPPER-OXIDE SUPERCONDUCTORS
   MULTIPLE-SCATTERING ANALYSIS
   HIGH-ENERGY SPECTROSCOPY
   ABSORPTION-SPECTRA
   PHOTOELECTRON-SPECTRA
   EDGE STRUCTURE
   PHOTOEMISSION SPECTRA
   INCOMPLETE SHELL
   SINGLE-CRYSTAL
Аннотация: The current state of theoretical and experimental studies on the electronic structure of high-T-c superconductors is analyzed. The agreement between the theory and experimental spectroscopic data is shown to be rather poor in certain cases. The reason is that the X-ray and electronic spectra reveal strong electron correlations. At the same time, no realistic model has been developed up to now in which both one-electron and multielectron mechanisms of the formation of the spectra could be described in a unified way in compounds containing transition and rare-earth elements. In this paper, particular attention is paid to a sudden-perturbation model, by which it has been possible to describe or interpret some X-ray and electronic spectra, including both one-electron and multielectron effects. (C) 2000 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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16.

Avramov, P. V.
Effects of the intense electron correlations on the shape of x-ray CuK absorption spectra of La2-xSrxCuO4 / P. V. Avramov, S. G. Ovchinnikov // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. - Vol. 108, Is. 4. - P. 1479-1488. - Cited References: 28 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
HIGH-TC SUPERCONDUCTIVITY
   EDGE STRUCTURE
   LA2CUO4
   SATELLITES
   ALPHA
   EXCITATIONS
   COPPER
   OXIDES
   STATE
   SHAKE

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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17.

Avramov, P. V.
Influence of strong electron correlations on the form of the x-ray Cu K absorption spectra of La2-xSrxCuO4 / P. V. Avramov, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2011. - Vol. 81, Is. 4. - P. 811-816. - Cited References: 24. - We thank the Scientific Council for the Problem of HighTemperature Superconductivity for support under Project . - ISSN 1063-7761
Аннотация: The influence of strong electron correlations on the x-ray Cu K absorption spectra has been investigated using the extended p-d model and the sudden approximation. The structure of the vacant above-threshold single-electron Cu p states has been modeled by the SCF X, scattered wave method. It has been shown that the Cu K spectrum is determined by a convolution of the spectra of single-electron absorption by vacant orbitals below and above the ionization threshold and of many-electron transitions within the system of valence electrons. This makes it possible to attribute the main peak of the Cu K spectrum of La2Cu04 to the Cu dlOL configuration and the single high-energy satellite to the Cu d9 configuration. The LaSrCu04 spectrum has been calculated with allowance for both singlet and triplet two-hole states of the CuO, cell. Comparison with experimental data reveals that the main two-hole state is a triplet, which also forms the absorption spectrum consisting of the main maximum corresponding to the Cu ~'OLL configuration and two satellites corresponding to the Cu d9L and Cu d8 configurations. All the theoretical spectra obtained agree well with the experimental data. O 1995 American Institute of Physics.

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Публикация на русском языке Аврамов, Павел Вениаминович. Влияние эффектов сильных электронных корреляций на форму рентгеновских CuK-спектров поглощения La_2-xSr_x CuO_4 [Текст] / П. В. Аврамов, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 1995. - Т. 108 Вып. 4. - С. 1479-1488

Держатели документа:
[Ovchinnikov, S. G.
Makarov, I. A.
Shneyder, E. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.
Shneyder, E. I.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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18.

Avramov, P. V.
Non-diagram transitions in polarized X-ray absorption CuL(3) spectra of HTSC-ceramics / P. V. Avramov, S. G. Ovchinnikov // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 11. - P. 3226-3240. - Cited References: 28 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TC SUPERCONDUCTIVITY
   LA2CUO4
   ALPHA
   SATELLITES
   STATES
   OXIDES
   XANES

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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19.

Avramov, P. V.
The strong electron correlation effects in XAFS spectra of HTSC cuprates / P. V. Avramov, S. G. Ovchinnikov // J. Phys. IV. - 1997. - Vol. 7: 9th International Conference on X-Ray Absorption Fine Structure (AUG 26-30, 1996, GRENOBLE, FRANCE), Is. C2. - P. 183-185. - Cited References: 11 . - ISSN 1155-4339

РУБ Physics, Multidisciplinary
Рубрики:
X-RAY-ABSORPTION
   MULTIPLE-SCATTERING ANALYSIS
   EDGE STRUCTURE
   LA2CUO4
   XANES
Аннотация: Theoretical XAFS spectra of highly correlated copper oxides have been presented as a product of a single-electron part obtained by the SCF X alpha- SW method, and a multi-electron part obtained by the multi-band multi-electron p-d model. The main line of CuK-spectrum of La2CuO4 was aligned to the Cud(10) (L) under bar configuration and the single satellite line was aligned to the Cud(9). Comparison of the theoretical data with the experimental ones shows that the ground state of the two-holes in the CuO4 doped cell is triplet. The last conclusion has been confirmed by analysis of CuL2,3-spectra of two-hole impurity states of doped CuO4 cell. Another interesting future of CuL2,3-spectra a peak 2.8 eV higher the threshold was aligned to the transitions into quasi-stationary states due to existence of a high barrier in the Cud-state potential.

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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20.

Avramov, P. V.
Underestimating the width of the bandgap in the electronic spectra of La2CuO4 / P. V. Avramov, S. G. Ovchinnikov // Phys. Solid State. - 1997. - Vol. 39, Is. 3. - P. 389-391, DOI 10.1134/1.1129865. - Cited References: 9 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SUPERCONDUCTIVITY
Аннотация: It is shown that the width of the bandgap determined by the simultaneous analysis of the experimental photoelectron and inverse photoemission spectra of the surface of La2CuO4 using a common energy scale is underestimated by 1 eV. The electronic and satellite structures of the spectra of La2CuO4 are calculated on the basis of the multiband p-d model and the sudden perturbation approximation. It is shown that shakedown processes shift the one-electron contour of the final two-hole configuration of the photoelectron spectrum 1 eV down the energy scale and shift the contour of the final d(10) configuration of the inverse photoemission spectrum downward by 2 eV; these shifts cause the energy splitting between the filled and empty bands to be underestimated. (C) 1997 American Institute of Physics.

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Держатели документа:
L. V. Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
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