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Slabko, V. V.
Self-organised aggregation of a pair of particles with different resonant frequencies and electric dipole moments of transitions, controlled by an external quasi-resonant field / V. V. Slabko, A. S. Tsipotan, A. S. Aleksandrovsky // Quantum Electron. . - 2013. - Vol. 43, no. 5. - P. 458-462DOI 10.1070/QE2013v043n05ABEH015021
Аннотация: The influence of the oscillation phases of the dipole moments induced in metal nanoparticles and quantum dots by an external laser field on their interaction energy is considered. It is shown that a difference in resonant frequencies leads to the formation of additional minima and maxima, which are absent in the spectral dependence of the interaction energy of identical particles at similar orientations of the pair of particles with respect to the plane of polarisation of radiation. These features are due to the fact that the oscillation phase difference of the induced dipole moments of particles reaches values close to π.

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Публикация на русском языке Слабко, Виталий Васильевич. Управляемая внешним квазирезонансным полем самоорганизованная агрегация пары частиц с разными резонансными частотами и электродипольными моментами переходов / В. В. Слабко // Квантовая электроника. - 2013. - Т. 43, № 5. - С. 458-462

Доп.точки доступа:
Tsipotan, A. S. ; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Слабко, Виталий Васильевич
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Слабко, Виталий Васильевич.
Управляемая внешним квазирезонансным полем самоорганизованная агрегация пары частиц с разными резонансными частотами и электродипольными моментами переходов / В. В. Слабко, А. С. Ципотан, А. С. Александровский // Квант. электроника. - 2013. - Т. 43, № 5. - С. 458-462
Кл.слова (ненормированные):
взаимодействие лазерного излучения с веществом -- дипольное взаимодействие -- наночастицы -- наноструктуры
Аннотация: Рассмотрено влияние фаз колебаний наведенных внешним лазерным полем дипольных моментов наночастиц металла и квантовых точек на энергию их взаимодействия. Показано, что различие в резонансных частотах приводит к возникновению дополнительных минимумов и максимумов, отсутствующих в спектральной зависимости энергии взаимодействия идентичных частиц при аналогичных ориентациях пары частиц относительно плоскости поляризации излучения. Последнее связано с достижением разностью фаз колебаний наведенных дипольных моментов частиц величин, близких к π.

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Переводная версия Self-organised aggregation of a pair of particles with different resonant frequencies and electric dipole moments of transitions, controlled by an external quasi-resonant field. - [Б. м. : б. и.]

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Ципотан, Алексей Сергеевич; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.; Slabko V.V.
}
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Bulgakov, E. N.
All-optical manipulation of light in X- and T-shaped photonic crystal waveguides with a nonlinear dipole defect / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. B. - 2012. - Vol. 86, Is. 7. - Ст. 75125, DOI 10.1103/PhysRevB.86.075125. - Cited References: 38. - The work is partially supported by Integration Project of Siberian Branch of RAS (Project No. 29) and RFBR Grant No. 12-02-000094. We thank D. N. Maksimov for critical reading of the manuscript. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SPONTANEOUS SYMMETRY-BREAKING
   FIBER
   CAVITIES
   SYSTEM
   FIELDS
Аннотация: We consider light transmission in X- and T-shaped photonic crystal waveguides which hold nonlinear defect with two resonant dipole modes. By use of the coupled-mode theory and by numerical solution of the Maxwell equations for the transverse-magnetic (TM) light mode, we show two stable types of the solutions. The first type has no cross talk, while the second type does owe to nonlinearity of the defect. We show also that direct path transmission processes in the waveguides play an important role for breaking of symmetry.

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Siberian State Aerosp Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Bulgakov, E. N.
Symmetry breaking in photonic crystal waveguide coupled with the dipole modes of a nonlinear optical cavity / E. N. Bulgakov, A. F. Sadreev // J. Opt. Soc. Am. B. - 2012. - Vol. 29, Is. 10. - P. 2924-2928. - Cited References: 17. - This work is partially supported by the Integration Project of the Siberian Branch of the Russian Academy of Sciences (RAS) (project no. 29) and the Russian Fund of Basic Research (RFBR) grant 12-02-000094. We thank D. N. Maksimov for assistance in the manuscript preparation. . - ISSN 0740-3224

РУБ Optics

Аннотация: We present stable symmetry breaking solutions in a nonlinear optical cavity with dipole eigenmodes embedded into the propagation band of a directional photonic crystal waveguide for symmetric injecting condition. We demonstrate how this phenomenon can be exploited for all-optical switching of light transmission from the one side of the waveguide to another by application of input pulses. When the light injected to both sides of the waveguide has equal intensities but different phases, we reveal a wealth of new solutions. (c) 2012 Optical Society of America

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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    Mironov, V. L.
    Multirelaxation generalized refractive mixing dielectric model of moist soils / V. L. Mironov, P. P. Bobrov, S. V. Fomin // IEEE Geosc. Remote Sens. Letters. - 2013. - Vol. 10, Is. 3. - Ст. 6332477. - P. 603-606, DOI 10.1109/LGRS.2012.2215574 . - ISSN 1545-598X
   Перевод заглавия: Многорелаксационная обобщенная рефракционная диэлектрическая модель влажных почв
Кл.слова (ненормированные):
Bound soil water -- dielectric model -- dielectric relaxations -- dielectric spectra -- free soil water -- moist soil -- Bound waters -- Complex dielectric constant -- Debye relaxation -- Dielectric models -- Dielectric spectra -- Dipole relaxation -- Frequency ranges -- Gigahertz frequencies -- Gigahertz range -- Moist soil -- Soil water -- Spectroscopic parameters -- Water molecule -- Dielectric relaxation -- Mixing -- Molecules -- Soil moisture -- Geologic models
Аннотация: In this letter, a multirelaxation generalized refractive mixing dielectric model (GRMDM) for moist soil is proposed and substantiated in the frequency range from 0.04 to 26.5 GHz. This model is based on the methodology of a single-relaxation GRMDM which accounts only for the dipole relaxation of water molecules in the gigahertz frequency range. The proposed multirelaxation GRMDM takes into account both the dipole (Debye) and ionic (Maxwell-Wagner) relaxations of soil water molecules. For this purpose, it uses a two-frequency Debye relaxation equation for the dielectric spectra of bound water. The spectroscopic parameters of the multirelaxation GRMDM were derived by fitting the spectra calculated by this model to the respective measured ones. The main advantage of this model is that it predicts the complex dielectric constant of moist soils throughout the megahertz and gigahertz frequency ranges with the same error as the single-relaxation GRMDM does only in the gigahertz range.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Omsk State Pedag Univ, Omsk 644099, Russia

Доп.точки доступа:
Bobrov, P. P.; Fomin, S. V.; Фомин, Сергей Викторович; Миронов, Валерий Леонидович
}
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Bulgakov, E. N.
All-optical diode based on dipole modes of Kerr microcavity in asymmetric L-shaped photonic crystal waveguide / E. N. Bulgakov, A. F. Sadreev // Opt. Lett. - 2014. - Vol. 39, Is. 7. - P. 1787-1790, DOI 10.1364/OL.39.001787. - Cited References: 14. - This work was partially supported by RFBR grant 13-02-00497 . - ISSN 0146-9592. - ISSN 1539-4794

РУБ Optics
Рубрики:
TRANSMISSION
Аннотация: A design of all-optical diode in L-shaped photonic crystal waveguide is proposed that uses the multistability of single nonlinear Kerr microcavity with two dipole modes. Asymmetry of the waveguide is achieved through different couplings of the dipole modes with the left and right legs of the waveguide. Using coupled mode theory we demonstrate an extremely high transmission contrast. The direction of optical diode transmission can be controlled by power or frequency of injected light. The theory agrees with the numerical solution of the Maxwell equations. (C) 2014 Optical Society of America

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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич; RFBR [13-02-00497]
}
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Aver'yanov, E. M.
Anisotropy of dipole-dipole interactions in ferroelectric langmuir films of poly(vinylidene fluoride-trifluoroethylene) / E. M. Aver'yanov // JETP Letters. - 2014. - Vol. 99, Is. 10. - P. 590-593, DOI 10.1134/S0021364014100026. - Cited References: 12 . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
LOCAL-FIELD
BLODGETT-FILMS
COPOLYMER
Аннотация: The Lorentz tensor components L (j) for poly(vinylidene fluoride-trifluoroethylene, 70/30) Langmuir-Blodgett films in the ferroelectric phase are determined experimentally. The results indicate that intralayer dipole-dipole interaction between the segments of the polymer is stronger than interlayer interaction. This conclusion agrees with the absence of the critical film thickness below which ferroelectricity would cease to exist.

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Публикация на русском языке Аверьянов, Евгений Михайлович. Анизотропия диполь-дипольных взаимодействий в сегнетоэлектрических лэнгмюровских пленках поли(винилиденфторид-трифторэтилена) [Текст] / Е. М. Аверьянов // Письма в Журн. эксперим. и теор. физ. : Наука, 2014. - Т. 99 Вып. 10. - С. 679-682

Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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    Self-organized aggregation simulation of resonant nanoparticles in a laser field / V. V. Slabko [et al.] // 16th International Conference Laser Optics (LO 2014) : Proceedings : IEEE Computer Society, 2014. - Ст. ThR6-40, DOI 10.1109/LO.2014.6886372. - Cited References: 2 . - 6886372. - ISBN 978-1-4799-3884-1
Рубрики:
Engineering, Electrical & Electronic
   Optics
   Physics, Applied
Кл.слова (ненормированные):
dipole-dipole interaction -- interaction of laser radiation with matter -- nanoparticles -- nanostructures
Аннотация: Self-organized aggregation of nanoparticles in external resonant laser field is considered using Brownian dynamics model. Formation probabilities are calculated for the pair of particles in dependence on laser wavelength and mutual orientation of particles. Times required for aggregation are calculated. Possibility of efficient aggregation using pulsed laser is deduced. © 2014 IEEE.

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Доп.точки доступа:
Slabko, V. V.; Слабко, Виталий Васильевич; Tsipotan, A. S.; Ципотан, Алексей Сергеевич; Gerasimova, M. A.; Герасимова М. А.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; "Оптика лазеров", Международная конференция(16 ; 2014 ; 30 июня - 04 июля ; Санкт-Петербург); "Laser Optics", International conference(16 ; 2014 ; June 30 - July 04 ; St. Petersburg)
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    Self-Assembly of nanoparticles controlled by resonant laser light / A. S. Tsipotan [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2015. - Vol. 8, Is. 1. - P. 109-122 ; Журн. СФУ. Сер. "Математика и физика". - Cited References: 34. - This research was supported by Siberian Federal University under the grant F12 and by the Ministry of Education and Science of Russian Federation under the contract 14.А18.21.1942. . - ISSN 1997-1397
   Перевод заглавия: Самоорганизация наночастиц, контролируемая резонансным лазерным полем
Кл.слова (ненормированные):
Dipole-dipole interaction -- Interaction of laser radiation with matter -- Nanoparticles -- Nanostructures -- взаимодействие лазерного излучения с веществом -- дипольное взаимодействие -- наноструктуры -- наночастицы
Аннотация: The paper presents theoretical justification for the possibility of formation of nanoparticle structures with the predefined configuration. The process of formation is the self-organized aggregation of nanoparticles under the action of external resonant laser field. The formation of various nanostructures that contain metallic and semiconducting nanoparticles with resonances in the visible spectrum is considered in the dipole-dipole approximation.
Теоретически показана возможность формирования структур из наночастиц с заранее заданной конфигурацией. Это возможно благодаря явлению самоорганизации наночастиц под действием внешнего резонансного поля лазерного излучения. Формирование различных наноструктур, содержащих металлические и полупроводниковые наночастицы с резонансной длиной волны в видимой области, считалось в диполь-дипольном приближении.

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Держатели документа:
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Kirenskogo, 26Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, SB RASAkademgorodok, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Svobodny, 79Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tsipotan, A. S.; Ципотан, Алексей Сергеевич; Slabko, V. V.; Слабко, Виталий Васильевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Abuzova, N. V.; Абузова, Нина В.

}
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10.

Self-organized aggregation simulation of resonant nanoparticles in a laser field / V. V. Slabko [et al.] // International Conference Laser Optics : IEEE, 2014. - Cited References:2

РУБ Engineering, Electrical & Electronic + Optics + Physics, Applied

Кл.слова (ненормированные):
interaction of laser radiation with matter -- dipole-dipole interaction -- nanoparticles -- nanostructures
Аннотация: Self-organized aggregation of nanoparticles in external resonant laser field is considered using Brownian dynamics model. Formation probabilities are calculated for the pair of particles in dependence on laser wavelength and mutual orientation of particles. Times required for aggregation are calculated. Possibility of efficient aggregation using pulsed laser is deduced.

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Доп.точки доступа:
Slabko, V. V.; Слабко, Виталий Васильевич; Tsipotan, A. S. ; Ципотан, Алексей Сергеевич; Gerasimova, M. A.; Герасимова М. А.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; International Conference on Laser Optics(16 ; 2014 ; June 30-July 04 ; St Petersburg, Russia)
}
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11.

Ignatchenko, V. A.
Green’s function of magnetoelastic waves / V. A. Ignatchenko, D. S. Polukhin // Solid State Phenom. : Selected, peer reviewed papers. - 2015. - Vol. 233-234: Achievements in Magnetism. - P. 12-15, DOI 10.4028/www.scientific.net/SSP.233-234.12 . - ISSN 1662-9779. - ISSN 978-3-038
Кл.слова (ненормированные):
Dispersion relations -- Elastic waves -- Green’s functions -- Magnetoelastic coupling -- Resonances -- Spin waves -- Green's function -- Resonance -- Spin waves -- Wave propagation -- Approximate expressions -- Dipole dipole interactions -- Dispersion relations -- Elastic oscillations -- Longitudinal elastic wave -- Magnetoelastic couplings -- Off-diagonal elements -- S function -- Elastic waves
Аннотация: The matrix (5x5) Green's function of magnetoelastic waves in an isotropic magnetoelastic medium taking into account the dipole-dipole interaction has been derived. The imaginary parts of diagonal and off-diagonal elements of the Green's function in the crossing resonance of spin and longitudinal elastic waves has been investigated. It is shown that under changing the angle of wave propagation θ the amplitudes of Green functions change drastically due redistribution of energy between the magnetic and elastic oscillation. Approximate expressions for the dependence of the widths of the gaps in the spectrum on the angle θ have been also derived. © (2015) Trans Tech Publications, Switzerland.

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Доп.точки доступа:
Perov, N. \ed.\; Semisalova, A. \ed.\; Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(6 ; 2014 ; June-July ; Moscow)
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12.

FMR investigations of two-dimensional periodic arrays of disc-shaped Co particles at different temperatures / O. N. Martyanov [et al.] // J. Supercond. Nov. Magn. - 2015. - Vol. 28, Is. 12. - P. 3587-3591, DOI 10.1007/s10948-015-3178-3. - Cited References: 14. - The authors gratefully acknowledge the financial support by the Center of Material and Technology (COMATT) . - ISSN 1557-1939

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
FERROMAGNETIC-RESONANCE
FILMS
Кл.слова (ненормированные):
Cobalt film -- Dipole-dipole interaction -- Ferromagnetic resonance (FMR)
Аннотация: Using ferromagnetic resonance method, we performed measurements of two-dimensional periodic arrays of disc-shaped cobalt particles with different diameters a=450 and 900 nm and the distance between them l=2a and 3a with temperature variation in the range T = 140 −300 K. The first derivative of the microwave absorption spectrum was registered. With the increase of T additional peaks on both sides from the main peak that move aside from it, all peaks show an increase of the intensity and a decrease of the width. Dependences of the resonance field on T shows saturation-like behavior with increasing temperature. They move to higher temperatures and show sharper behavior with a increase and l decrease, respectively. An increase of a leads to the intensity decrease and width increase of all three adsorption peaks.

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Держатели документа:
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Lavrentieva 5, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
Sumy State University, Rimsky-Korsakov Str. 2, Sumy, Ukraine
Institute of Physics, University Mainz, Staudingerweg 7, Mainz, Germany
Institute of Solid State Research IFF-6 “Electronic Properties”, Research Centre Julich, Julich, Germany

Доп.точки доступа:
Martyanov, O. N.; Balaev, D. A.; Балаев, Дмитрий Александрович; Pylypenko, O. V.; Odnodvorets, L. V.; Chernov, S. V.; Nepijko, S. A.; Elmers, H.-J.; Schneider, C. M.; Schonhense, G.
}
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13.

    Влияние многоуровнего характера спектра полупроводниковых наночастиц на энергию их взаимодействия в квазирезонансном электромагнитном поле / А. А. Глушков [и др.] // В мире науч. открытий. - 2015. - № 12.1 (72). - С. 356-368. - Библиогр.: 20 . - ISSN 2072-0831. - ISSN 2307-9428
   Перевод заглавия: Effect of multilevel nature of the spectrum of quantum dots in the energy of their interaction in quasi-resonant electromagnetic field
Кл.слова (ненормированные):
диполь-дипольное взаимодействие -- наночастицы и наноструктуры -- взаимодействие лазерного излучения с веществом -- дисперсионные соотношения -- dipole-dipole interaction -- nanoparticles and nanostructures -- interaction of laser radiation with matter -- dispersion relations
Аннотация: Произведен расчет энергетических спектров взаимодействия пары наночастиц CdSe в квазирезонансном электромагнитном поле, для случаев одинаковых частиц и частиц с отличающимися длинами волн переходов, использовано диполь-дипольное приближение. Показано, что учет дополнительных переходов значительно увеличивает величину энергии взаимодействия для потенциальной ямы, лежащей в длинноволновой области спектра. На примере двух частиц с ограниченным числом резонансов исследовано влияние разности резонансных длин волн на глубину и положение потенциальной ямы.
Spectral dependences of interaction energy of multilevel semiconductor quantum dots are calculated in dipole-dipole approximation for a pair of CdSe quantum dots in a quasi-resonant laser field, for cases of two identical quantum dots and those with differing transition wavelengths. Interaction energy of pair of multilevel quantum dots in the long-wavelength potential well is much higher than that of pair of two-level quantum dots.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Глушков, А. А.; Glushkov, А. А.; Слюсарева, Евгения Алексеевна; Slyusareva, E. A.; Ципотан, Алексей Сергеевич; Tsipotan, A. S.; Слабко, Виталий Васильевич; Slabko, V. V.; Александровский, Александр Сергеевич; Aleksandrovsky, A. S.
}
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14.

Zobov, V. E.
Effect of intramolecular interaction on time growth of second moment of multiple quantum NMR in solids / V. E. Zobov, A. A. Lundin // INTERNATIONAL CONFERENCE ON RESONANCES IN CONDENSED MATTER: ALTSHULER100. Ser. Journal of Physics Conference Series : IOP PUBLISHING LTD, 2011. - Vol. 324: International Conference on Resonances in Condensed Matter (JUN 21-25, 2011, Kazan, RUSSIA). - Ст. 12010, DOI 10.1088/1742-6596/324/1/012010. - Cited References: 12 . - ISBN 1742-6588

РУБ Physics, Condensed Matter
Рубрики:
COHERENCES
DYNAMICS
Кл.слова (ненормированные):
Dipole dipole interactions -- Double-quantum -- Intramolecular interactions -- Multiple quantum NMR -- Nuclear spin system -- Quantum spectrum -- Rate increase -- Second moments -- Solids containing methyl groups -- Time dependence -- Functional groups -- Quantum optics -- Solids -- Spin dynamics -- Hamiltonians
Аннотация: The time dependence of the NMR multiple quantum spectrum in solids containing methyl groups is investigated. We studied both of types of the nuclear spin systems: namely linking by secular part of the mutual dipole-dipole interaction and linking by effective double quantum Hamiltonian. It is revealed for the first type of systems the rate with the time of the growing up of the second moment when intramolecular interaction is present becomes less in compare with situation when a strong intramolecular interaction is absent. On the contrary for the second type of Hamiltonian the above rate increases.

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[Zobov, V. E.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russian Federation
N.N. Semenov Institute of Chemical Physics, RAS, 117977, Moscow, Russian Federation

Доп.точки доступа:
Lundin, A. A.; Зобов, Владимир Евгеньевич
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15.

Lattice dynamics and ferroelectric instability in ordered and disordered PbSc1/2Ta1/2O3 and PbSc1/2Nb1/2O3 solid solutions / V. I. Zinenko [et al.] // J. Exp. Theor. Phys. - 2007. - Vol. 105, Is. 3. - P. 617-625, DOI 10.1134/S1063776107090191. - Cited References: 23 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
RELAXOR FERROELECTRICS
   PHASE-TRANSITION
   LOCAL-STRUCTURE
   PB(SC1/2NB1/2)O-3
   PEROVSKITE
   CRYSTALS
Кл.слова (ненормированные):
Dipole moment -- Lattice vibrations -- Negative ions -- Phonons -- Positive ions -- Solid solutions -- Dynamic Born charges -- Ferroelectric instabilities -- Frequency spectra -- Gordon-Kim models -- Oxygen anions -- Phonon spectra -- Ferroelectricity
Аннотация: The dynamic Born charges and the frequency spectra of lattice oscillations in the crystals of ordered and disordered PbSc1/2Ta1/2O3 (PST) and PbSc1/2Nb1/2O3 (PSN) solid solutions have been calculated within the framework of the generalized Gordon-Kim model with allowance for the dipole and quadrupole polarizabilities. The phonon spectra of both compounds contain ferroelectric soft modes. The influence of various interactions on the magnitude of dynamic charges and ferroelectric instability in PSN and PST solid solutions has been studied and it is shown that both these charges and the ferroelectric instability are determined by the competition between long-range dipole-dipole interactions and short-range dipole-charge interactions, the determining role played by the interaction of Nb (Ta) cations and oxygen anions in the Nb-O (Ta-O) bond direction.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991, Russian Federation

Доп.точки доступа:
Zinenko, V. I.; Зиненко, Виктор Иванович; Zamkova, N. G.; Замкова, Наталья Геннадьевна; Maksimov, E. G.; Sofronova, S. N.; Софронова, Светлана Николаевна
}
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16.

Zobov, V. E.
The coordinate of a singular point of the time correlation functions for a heteronuclear spin system of a crystal / V. E. Zobov, M. A. Popov // J. Exp. Theor. Phys. - 2005. - Vol. 100, Is. 4. - P. 775-783, DOI 10.1134/1.1926438. - Cited References: 24 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
FLUCTUATION SPECTRUM
   CROSS-RELAXATION
   NMR ABSORPTION
   SHAPE
   WINGS
   LINE
Кл.слова (ненормированные):
Correlation methods -- Crystal lattices -- Crystallography -- Functions -- Integral equations -- Lithium compounds -- Nuclear magnetic resonance -- Quantum theory -- Random processes -- Autocorrelation functions (ACF) -- Dipole-dipole interactions (DDI) -- Heteronuclear spin systems -- Self-consistent fluctuating field (SCFF) -- Crystals
Аннотация: The singularities of the time autocorrelation functions (ACFs) for a heteronuclear spin system of a crystal are investigated. Exact expressions are obtained for ten moments of the spectra of ACFs in the approximation of a self-consistent fluctuating field (SCFF) with arbitrary axial symmetry. These expressions are applied to determine the coordinate of the lowest singular point of these functions on the imaginary-time axis for a spin system with a dipole-dipole interaction (DDI). The leading corrections to this coordinate due to the correlation of local fields in real crystals are calculated. These corrections are determined by lattice sums with triangles of four bonds and pairs of four bonds. Numerical values of the coordinate are obtained for a LiF crystal in a magnetic field directed along three crystallographic axes. An increase in the coordinate of the singular point, which follows from the theory and leads to a faster falloff of the wings of the ACF spectra, qualitatively agrees with experiment. © 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Popov, M. A.; Зобов, Владимир Евгеньевич
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17.

Zobov, V. E.
Modeling multiparticle coherences in solid-state nuclear spin systems using infinite-range interaction / V. E. Zobov, A. A. Lundin // Theor. Math. Phys. - 2004. - Vol. 141, Is. 3. - P. 1737-1749, DOI 10.1023/B:TAMP.0000049765.41265.dd. - Cited References: 24 . - ISSN 0040-5779

РУБ Physics, Multidisciplinary + Physics, Mathematical
Рубрики:
MULTIPLE-QUANTUM DYNAMICS
   NMR-SPECTRA
   TEMPERATURE DYNAMICS
   SHAPE
   VAN
Кл.слова (ненормированные):
multipulse method -- dipole-dipole interaction -- multispin coherence -- time correlation function -- rotating reference frame -- dipole-dipole interaction -- multipulse method -- multispin coherence -- rotating reference frame -- time correlation function
Аннотация: Using the exactly solvable model known in statistical physics as the infinite-range interaction model (the van der Waals model), we obtain expressions for the hierarchy of multispin multiquantum time correlation functions for a solid-state paramagnetic nuclear spin system with magnetic dipole-dipole interaction between nuclei. These functions are observed experimentally using contemporary multiquantum NMR spectroscopy methods. We write the complete set of orthogonal multispin operators explicitly and find the time dependence for amplitudes of multiparticle time correlation functions. The proposed model describes the behavior of multiparticle correlation functions well, at least for not very large numbers n of expansion harmonics. The theoretical results agree well with the experimental data obtained for hexamethylbenzol.

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Держатели документа:
RAS, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk, Russia
RAS, NN Semenov Chem Phys Inst, Moscow, Russia
ИФ СО РАН
Kirenskii Institute for Physics, Siberian Branch, RAS, Krasnoyarsk, Russia, Russian Federation
Semenov Inst. for Chemical Physics, RAS, Moscow, Russia, Russian Federation

Доп.точки доступа:
Lundin, A. A.; Зобов, Владимир Евгеньевич
}
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18.

Electromagnetic density of states and absorption of radiation by aggregates of nanospheres with multipole interactions / V. A. Markel [et al.] // Phys. Rev. B. - 2004. - Vol. 70, Is. 5. - Ст. 54202, DOI 10.1103/PhysRevB.70.054202. - Cited References: 81 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
DISCRETE-DIPOLE APPROXIMATION
   ENHANCED RAMAN-SCATTERING
   METAL FRACTAL CLUSTERS
   OPTICAL-PROPERTIES
   SELECTIVE PHOTOMODIFICATION
   DISORDERED CLUSTERS
   NUMERICAL-SIMULATION
   SPECTRAL DEPENDENCE
   PARTICULATE MATTER
   LIGHT-SCATTERING
Кл.слова (ненормированные):
carbon -- iron -- palladium -- silver -- article -- dipole -- electromagnetic field -- geometry -- mathematical analysis -- molecular interaction -- nanoparticle -- radiation absorption
Аннотация: We calculate the quasistatic electromagnetic density of states for aggregates of touching spheres, in particular, linear chains and computer-generated random fractal aggregates. Multipole moments with orders of up to L=64 are taken into account for random aggregates with the number of particles of up to N=100 and up to L=8000 for linear chains. Extensive comparisons with the dipole approximation and geometrical cluster renormalization method are performed. Extinction spectra are calculated for several metals and black carbon. Long wavelength electromagnetic properties of fractal aggregates are considered in details.

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Держатели документа:
Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA
Jackson State Univ, Dept Phys, Jackson, MS 39217 USA
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia
Krasnoyarsk State Tech Univ, Dept Phys & Engn, Krasnoyarsk 660028, Russia
Natl Acad Sci Ukraine, Inst Surface Chem, UA-03164 Kiev, Ukraine
ИФ СО РАН
Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, United States
Department of Physics, Jackson State University, Jackson, MS 39217, United States
L. V. Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Moscow Inst. of Phys. and Technology, Dolgoprudny, Moscow Region 141700, Russian Federation
Dept. of Physics, and Engineering, Krasnoyarsk State Tech. University, Krasnoyarsk 660028, Russian Federation
Institute of Surface Chemistry, Natl. Academy of Sciences of Ukraine, 17 General Naumov St., 03164 Kiev, Ukraine

Доп.точки доступа:
Markel, V. A.; Pustovit, V. N.; Karpov, S. V.; Карпов, Сергей Васильевич; Obuschenko, A. V.; Gerasimov, V. S.; Герасимов, Валерий Сергеевич; Isaev, I. L.; Исаев, Иван Леонидович
}
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19.

Ground state and phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface / A. F. Sadreev [et al.] // J. Chem. Phys. - 2004. - Vol. 120, Is. 2. - P. 954-960, DOI 10.1063/1.1631920. - Cited References: 38 . - ISSN 0021-9606

РУБ Physics, Atomic, Molecular & Chemical
Рубрики:
MOLECULAR-DYNAMICS SIMULATION
   HYDROGEN-BOND
   MONOLAYERS
   MODEL
   GOLD
   PEPTIDES
   ALKANETHIOLS
   ACTIVATION
   FILMS
   CYS
Кл.слова (ненормированные):
Gold -- Ground state -- Hydrogen bonds -- Molecules -- Phase transitions -- Self assembly -- Surfaces -- Temperature -- Arg-cysteamines -- Crystal surface -- Dipole moments -- Dipole-dipole interactions -- Molecular dynamics
Аннотация: The translational and orientation order of arg-cysteamine molecules chemiabsorbed on the Au(111) crystal surface is considered. Couplings between carbon, nitrogen, and hydrogen atoms of the n-alkanethiols are approximated by the Lennard-Jones potential. Moreover, hydrogen bonds between oxygen and nitrogen and dipole-dipole interactions of the dipole moments of different atomic groups are taken into account. It is found that molecules are arranged in a 2x2 lattice and have the total symmetry C(6)xZ(2). The critical temperature of the phase transition to the tilted state T-c1, which breaks the symmetry C-6, is estimated to be extremely high. The spontaneous breakdown of the remaining symmetry Z(2) leads to the twisted state of the molecules and has the critical temperature T-c2=340 K. (C) 2004 American Institute of Physics.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Dept. of Phys. and Msrmt. Technology, Linkoping University, S-581 83 Linkoping, Sweden

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Sukhunin, Y. V.; Petoral, R. M.; Uvdal, K.
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20.

Zobov, V. E.
On the coordinate of a singular point of time correlation functions for the system of nuclear magnetic moments of a crystal / V. E. Zobov, M. A. Popov // J. Exp. Theor. Phys. - 2003. - Vol. 97, Is. 1. - P. 78-84, DOI 10.1134/1.1600799. - Cited References: 22 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
DIPOLAR FLUCTUATION SPECTRUM
   FREE-INDUCTION DECAY
   CROSS-RELAXATION
   DOUBLE-RESONANCE
   SPIN SYSTEMS
   NMR-SPECTRA
   LINE SHAPE
   IRREVERSIBILITY
   ABSORPTION
   CAF2
Кл.слова (ненормированные):
Absorption spectroscopy -- Barium compounds -- Crystallography -- Lattice constants -- Magnetic fields -- Nuclear magnetic resonance -- Absorption spectrum -- Dipole-dipole interaction -- Magnetic field directions -- Nuclear magnetic moments -- Magnetic moments
Аннотация: The hypothesis concerning the existence of singular points on the imaginary time axis for a correlation function of a system with the dipole-dipole interaction of nuclear spins of a crystal is verified. Within the framework of the self-consistent fluctuating field theory taking into account the principal corrections related to the correlation of local fields, a result for this coordinate is obtained in terms of the ratios of lattice sums. Experimental values of this coordinate are calculated from the wings of the nuclear magnetic resonance absorption spectrum of a BaF2 crystal for the magnetic field directions along the three crystallographic axes. Good agreement of the theoretical and experimental results justifies this hypothesis. (C) 2003 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Popov, M. A.; Зобов, Владимир Евгеньевич
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