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Общее количество найденных документов : 56
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1.


    Yelmanova, V. A.
    Transition from low-spin to high-spin states in clusters of polymerized acetylacetonate of Fe-3+ / V. A. Yelmanova, B. P. Khrustalev, A. D. Balaev // Solid State Commun. - 1982. - Vol. 43, Is. 3. - P. 175-177, DOI 10.1016/0038-1098(82)90105-3. - Cited References: 3 . - ISSN 0038-1098
РУБ Physics, Condensed Matter


WOS
Доп.точки доступа:
Khrustalev, B. P.; Хрусталев, Борис Петрович; Balaev, A. D.; Балаев, Александр Дмитриевич
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2.


   
    Surface-enhanced parametric scattering of light by silver clusters / S. G. Rautian [et al.] // JETP Letters. - 1988. - Vol. 47, Is. 4. - P. 243-246. - Cited References: 6 . - ISSN 0021-3640
РУБ Physics, Multidisciplinary


WOS
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
ИФ СО РАН
Доп.точки доступа:
Rautian, S. G.; Раутиан, Сергей Глебович; Safonov, V. P.; Сафонов В. П.; Chubakov, P. A.; Shalaev, V.M.; Шалаев, Владимир Михайлович; Shtokman, M. I.
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3.


    Butenko, A. V.
    Giant impurity nonlinearities in optics of fractal clusters / A. V. Butenko, V. M. Shalayev, M. I. Stockman // Zhurnal |Eksperim. Teor. Fiz. - 1988. - Vol. 94, Is. 1. - P. 107-124. - Cited References: 12 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary


WOS
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
KRASNOYARSK STATE UNIV,KRASNOYARSK,USSR
ИФ СО РАН
Доп.точки доступа:
Shalayev, V. M.; Шалаев, Владимир Михайлович; Stockman, M. I.; Бутенко, Андрей Викторович
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4.


   
    Nonlinear optics of metallic fractal clusters / A. V. Butenko [et al.] // Izvestiya Akademii Nauk SSSR Seriya Fizicheskaya. - 1989. - Vol. 53, Is. 6. - P. 1195-1201. - Cited References: 13 . - ISSN 0367-6765
РУБ Physics, Multidisciplinary


WOS
Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK,USSR
ИФ СО РАН
Доп.точки доступа:
Butenko, A. V.; Danilova, Y. E.; Ishikaev, S. M.; Karpov, S. V.; Карпов, Сергей Васильевич; Popov, A. K.; Попов, Александр Кузьмич; Rautian, S. G.; Safonov, V. P.; Slabko, V. V.; Слабко, Виталий Васильевич; Crubakov, P. A.; Shalaev, V. M.; Shtokman, M. I.
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5.


    Sshalaev, V. M.
    Resonant light-scattering by fractal clusters / V. M. Sshalaev, R. Botet, R. Jullien // Phys. Rev. B. - 1991. - Vol. 44, Is. 22. - P. 12216-12225, DOI 10.1103/PhysRevB.44.12216. - Cited References: 19 . - ISSN 0163-1829
РУБ Physics, Condensed Matter
Рубрики:
AEROGELS
   OPTICS
Аннотация: A scale-invariant theory of resonant Rayleigh scattering by fractal clusters is developed. Our main result is that the scattering cross section is greatly enhanced, because of the presence of very high local fields, which are correlated and strongly fluctuating. Simulations dealing with two examples of fractal structures, namely, random walk and cluster-cluster aggregates, are presented. The numerical results confirm the theoretical predictions of the scaling behavior for both absorption and scattering, and allow us to obtain the corresponding exponents. In addition to the results for scattering, the large scale of the simulations of the present work provides a comprehensive confirmation and a substantial extension of a recent study by Markel, Muratov, Stockman, and George [Phys. Rev. B 43, 8183 (1991)].

WOS
Держатели документа:
UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY
LV KIRENSKY PHYS INST,KRASNOYARSK,USSR
UNIV PARIS 11,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE
ИФ СО РАН

Доп.точки доступа:
Botet, R.; Jullien, R.
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6.


   
    Enhanced raman-scattering by fractal clusters - scale-invariant theory / M. I. Stockman [et al.] // Phys. Rev. B. - 1992. - Vol. 46, Is. 5. - P. 2821-2830, DOI 10.1103/PhysRevB.46.2821. - Cited References: 22 . - ISSN 0163-1829
РУБ Physics, Condensed Matter
Рубрики:
AGGREGATION
   LIGHT
Аннотация: A scale-invariant theory of Raman scattering of light by fractal clusters is developed. The enhancement factor G(RS) of Raman scattering is shown to scale in terms of a properly chosen spectral variable X. The critical indices of the enhancement factor are found to be determined by the optical spectral dimension of the fractal. Numerical modeling is carried out and shown to support the analytical results obtained. The theory, which does not contain any adjustable parameters, agrees well with experimental data on surface-enhanced Raman scattering over a wide spectral range.

WOS
Держатели документа:
WASHINGTON STATE UNIV,DEPT CHEM,PULLMAN,WA 99164
ONTARIO LASER & LIGHTWAVE RES CTR,TORONTO M5S 1A1,ONTARIO,CANADA
UNIV TORONTO,DEPT CHEM,TORONTO M5S 1A1,ONTARIO,CANADA
UNIV PARIS 11,CTR ORSAY,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE
RUSSIAN ACAD SCI,INST AUTOMAT & ELECTROMETRY,NOVOSIBIRSK 630090,USSR
LV KIRENSKY PHYS INST,KRASNOYARSK 660036,USSR
ИФ СО РАН

Доп.точки доступа:
Stockman, M. I.; Shalaev, V. M.; Moskovits, M.; Botet, R.; George, T. F.
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7.


   
    Dynamic chaos in magnetic systems / K. N. Alekseyev [et al.] // Uspekhi Fiz. Nauk. - 1992. - Vol. 162, Is. 7. - P. 81-118. - Cited References: 99 . - ISSN 0042-1294
РУБ Physics, Multidisciplinary
Рубрики:
CLASSICAL SPIN CLUSTERS
   YTTRIUM-IRON-GARNET
   PARALLEL-PUMPED MAGNONS
   NON-LINEAR SYSTEMS
   QUANTUM CHAOS
   FAT FRACTALS
   FERROMAGNETIC (CH3NH3)2CUCL4
   NONLINEAR DYNAMICS
   LEVEL REPULSION
   KICKED TOP
Аннотация: A review of the theoretical and experimental investigations of chaos in magnetic systems is represented. Both dissipative and Hamiltonian systems are considered. Basic scenarios of transitions to chaos in such systems are overlooked. Models and characteristics of chaotic oscillations in a parametric excitation of spin waves. NMR-masers, dynamics of spin chains, motion of spin in an external oscillating magnetic field and nonlinear NMR with a dynamic frequency shift are discussed. A problem of the quantum chaos in spin systems is analysed.

WOS

Доп.точки доступа:
Alekseyev, K. N.; Berman, G. P.; Берман, Геннадий Петрович; Tsifrinovich, V. I.; Цифринович, Владимир Ильич; Frishman, A. M.
}
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8.


    Shalaev, V. M.
    Localization of collective dipole excitations on fractals / V. M. Shalaev, R. Botet, A. V. Butenko // Phys. Rev. B. - 1993. - Vol. 48, Is. 9. - P. 6662-6664, DOI 10.1103/PhysRevB.48.6662. - Cited References: 11 . - ISSN 1098-0121
РУБ Physics, Condensed Matter
Рубрики:
CLUSTERS
Аннотация: Dipole optical excitations on fractals are numerically simulated. It is shown that dipole eigen-modes of fractals are localized. The corresponding localization length dependence on the generalized frequency parameter (dispersion law) has been calculated. The value of optical spectral dimension found from the dispersion relations is in agreement with the result obtained earlier from calculations of the density of eigenstates.

WOS
Держатели документа:
UNIV PARIS 11, PHYS SOLIDES LAB, F-91405 ORSAY, FRANCE
KRASNOYARSK STATE UNIV, KRASNOYARSK 660062, RUSSIA
LV KIRENSKII INST PHYS, KRASNOYARSK 660036, RUSSIA
UNIV TORONTO, DEPT CHEM, TORONTO M5S 1A1, ONTARIO, CANADA
ИФ СО РАН

Доп.точки доступа:
Botet, R.; Butenko, A. V.
}
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9.


    Shalaev, V. M.
    Small-particle composites .2. Nonlinear optical properties / V. M. Shalaev, E. Y. Poliakov, V. A. Markel // Phys. Rev. B. - 1996. - Vol. 53, Is. 5. - P. 2437-2449, DOI 10.1103/PhysRevB.53.2437. - Cited References: 45 . - ISSN 0163-1829
РУБ Physics, Condensed Matter
Рубрики:
FRACTAL CLUSTERS
   RAMAN-SCATTERING
   SUSCEPTIBILITY
   CONDUCTIVITY
   EXCITATIONS
   COLLOIDS
   LIGHT
Аннотация: Strong fluctuations of local fields may result in very large optical nonlinearities in small-particle composites. Enhancement associated with particle clustering is found for a number of optical processes, including four-wave mixing (FWM), third-harmonic generation (THG), Raman scattering, and nonlinear refraction and absorption in Kerr media. Field fluctuations and optical nonlinear susceptibilities are especially large in fractal clusters. The enhancement of optical processes is expressed in terms of the resonant linear absorption by collective dipolar eigenmodes in a cluster, and quality factors, q, of the modes (q much greater than 1). It is shown that the susceptibility of a composite material consisting of random small-particle clusters is proportional to q(3) for Raman scattering and the Kerr optical nonlinearity, and to q(4) and q(6) for THG and FWM, respectively. For all of these processes, a spectral dependence of the effective susceptibility is found. Broad-scale numerical simulations of the optical response in small-particle composites are performed to complement the theory. The simulations are in reasonable agreement with available experimental data.

WOS
Держатели документа:
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
RUSSIAN ACAD SCI,INST AUTOMAT & ELECTROMETRY,NOVOSIBIRSK 630090,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Poliakov, E. Y.; Markel, V. A.
}
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10.


   
    Numerical studies of second- and fourth-order correlation functions in cluster-cluster aggregates in application to optical scattering / V. A. Markel [et al.] // Phys. Rev. E. - 1997. - Vol. 55, Is. 6. - P. 7313-7333, DOI 10.1103/PhysRevE.55.7313. - Cited References: 21 . - ISSN 1063-651X
РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
DIFFUSION-LIMITED AGGREGATION
   COLLOIDAL AGGREGATION
   FRACTAL CLUSTERS
   ANTICORRELATION
   SIMULATIONS
Аннотация: Two- and four-point density correlation functions p(2)(r) and p(4)(r) are studied numerically and theoretically in computer-generated three-dimensional lattice cluster-cluster aggregates (CCA) with the number of particles N up to 20 000 in application to the light scattering problem. The ''pure'' aggregation algorithm is used, where subclusters of all possible sizes are allowed to collide. We find that large CCA clusters demonstrate pronounced multiscaling. In particular, the fractal dimension determined from the slope of p(2)(r) at small distances differs from that found from the dependence of the radius of gyration on the number of monomers (according to our data, 1.80 and 1.94, respectively). We also consider different functional forms for p(2) and their general properties and applicability. We find that the best fit to the numerical data is provided by the generalized exponential cutoff function with coefficients depending on N. The latter dependence is a manifestation of multiscaling. We propose some theoretical approaches for calculating p(4)(r), assuming p(2)(r) is known. In particular, we find the small-r asymptote for the p(4)(r) and verify it numerically. In addition, we find that p(4)(r) cannot be represented by a scaling dependence with a cutoff function, like p(2)(r) Instead, p(4)(r) is given by an expansion in terms of integer powers of r(2D-3), where D is the fractal dimension (approximate to 1.8 for CCA clusters).

WOS
Держатели документа:
UNIV WISCONSIN,DEPT CHEM,OFF CHANCELLOR,STEVENS POINT,WI 54481
UNIV WISCONSIN,DEPT PHYS & ASTRON,STEVENS POINT,WI 54481
RUSSIAN ACAD SCI,INST AUTOMAT & ELECTROMETRY,NOVOSIBIRSK 630090,RUSSIA
RUSSIAN ACAD SCI,SIBERIAN BRANCH,LV KIRENSKY PHYS INST,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Markel, V. A.; Shalaev, V. M.; Poliakov, E. Y.; George, T. F.
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