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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ershov R.E.
Заглавие : Magnetization curve of a thin magnetic film in the difficult direction in presence of amplitude dispersion of anisotropy
Место публикации : Russ. Phys. J. - 1974. - Vol. 15, Is. 10. - P.1482-1484. - ISSN 0038-5697, DOI 10.1007/BF00892100
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krasikov V. S., Ogurtsov S. V., Ushatkin E. F.
Заглавие : High-frequency dielectric-dispersion in ferroelectric acid sulfates
Место публикации : Fiz. Tverd. Tela. - 1981. - Vol. 23, Is. 11. - P.3425-3428. - ISSN 0367-3294
Примечания : Cited References: 4
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : KRASIKOV V. S., OGURTSOV S. V., ZAITSEVA M. P.
Заглавие : DIELECTRIC-DISPERSION IN THE NH4HSEO4 FERROELECTRIC
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1982. - Vol. 24, Is. 2. - P641-643. - ISSN 0367-3294
Примечания : Cited References: 6
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Prokert F., Aleksandrov K. S.
Заглавие : Neutron scattering studies on phase transition and phonon dispersion in Cs//2NaBiCl//6
Место публикации : Phys Status Solidi B. - 1984. - Vol. 124, Is. 2. - P.503-513. - ISSN 0370-1972, DOI 10.1002/pssb.2221240208
Примечания : Cited References: 24
Ключевые слова (''Своб.индексиров.''): neutrons - scattering--phonons--phase transition--phonon dispersion--cesium compounds
Аннотация: The structural phase transition (PT) of elpasolite-type crystal Cs//2NaBiCl//6 is investigated by neutron scattering. At first the acoustic phonon dispersion is measured at room temperature for the high-symmetric directions DELTA , SIGMA , and LAMBDA of the Brillouin zone. The transverse rotary mode is studied for phonon wave vectors q parallel as well as perpendicular to DELTA and the dispersion shows a quasi-two-dimensional behavior of the Cl-octahedra rotation. At cooling down to the PT, this branch shows a softening along DELTA , reaching the lowest energies at the zone center. The PT, which is found to be of weakly first order, seems to be driven and triggered by the ferrorotative octahedra mode.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : KUBAREV Y. G.
Заглавие : RAMAN SPIN-LATTICE RELAXATION AND DISPERSION OF DAMPED OPTICAL PHONON FREQUENCIES AT PHASE-TRANSITION
Место публикации : Ferroelectr. Lett. Sect.: GORDON BREACH SCI PUBL LTD, 1988. - Vol. 9, Is. 2. - P39-42. - ISSN 0731-5171, DOI 10.1080/07315178808200697
Примечания : Cited References: 3
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kubarev Y. G.
Заглавие : Raman spin-lattice relaxation and dispersion of damped optical phonon frequencies at phase-transition
Место публикации : Ferroelectr. Lett. Sect. - 1988. - Vol. 8, Is. 5-6. - P.113-116. - ISSN 0731-5171
Примечания : Cited References: 3
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : ISKHAKOV R. S., CHEKANOV A. S., CHEKANOVA L. A.
Заглавие : EXPERIMENTAL-STUDY OF A MODIFIED DISPERSION-RELATION FOR SPIN-WAVES IN MULTILAYERED FILMS
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1990. - Vol. 32, Is. 2. - P441-447. - ISSN 0367-3294
Примечания : Cited References: 11
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Deich L. I., Ignatchenko V. A.
Заглавие : Phonon spectroscopy of inhomogeneities in disordered solids
Разночтения заглавия :us: Phonon spectroscopy of inhomogeneties in disordered solids
Место публикации : Solid State Commun. - 1991. - Vol. 80, Is. 10. - P.881-884. - ISSN 0038-1098, DOI 10.1016/0038-1098(91)90525-Z
Примечания : Cited References: 15
Предметные рубрики: SPIN-WAVES
AMORPHOUS FILMS
DISPERSION
FERROMAGNETS
Аннотация: A possibility to use elastic waves for investigation of inhomogeneities corresponding in size to intermediate order in disordered solids is considered. It is shown that frequency dependencies of phase and group velocities of the elastic waves have some peculiarities which give the possibilities to find the characteristic size of inhomogenities and to determine the parameter of a matter whose fluctuations are most significant for the phenomena under study.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Melnikova S.V., Davydova T. N.
Заглавие : Dispersion of optical-properties of A4CDX6 trigonal crystals
Место публикации : Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 7. - P.2094-2097. - ISSN 0367-3294
Примечания : Cited References: 8
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I. S., Morozova T. P., Zabluda V. M., Kim T. A., Turpanov I. A., Betenkova A. Ya., Dynnik Y. A.
Заглавие : Dispersion of Faraday rotation in Co/SiO2 multilayer films
Место публикации : JETP Letters. - 1996. - Vol. 63, Is. 4. - P.273-277. - ISSN 0021-3640, DOI 10.1134/1.567015
Примечания : Cited References: 9
Предметные рубрики: PARTICLES
Аннотация: The Faraday rotation spectra of Co/SiO2 multilayer films were found to be substantially different from the well-known spectra of homogeneous Co films. The character of these changes was studied as a function of the thicknesses of the ferromagnetic metal and the nonmagnetic dielectric layers. (C) 1996 American Institute of Physics.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G.
Заглавие : Quasiparticles in strongly correlated electronic systems in cuprate oxides
Место публикации : Uspekhi Fiz. Nauk: MEZHDUNARODNAYA KNIGA, 1997. - Vol. 167, Is. 10. - P.1043-1068. - ISSN 0042-1294
Примечания : Cited References: 227
Предметные рубрики: T-J-MODEL
HIGH-TEMPERATURE SUPERCONDUCTORS
DIMENSIONAL HUBBARD-MODEL
QUASI-PARTICLE DISPERSION
HEISENBERG-ANTIFERROMAGNET SR2CUO2CL2
ANGLE-RESOLVED PHOTOEMISSION
CHARGE FLUCTUATION REGIME
SADDLE-POINT SINGULARITY
SINGLET-TRIPLET MODEL
LA-SR-CU
Аннотация: New experimental and theoretical results on the electronic structure and spectral properties of quasiparticles in cuprate oxides are reviewed. It is shown that the electronic structure transforms from antiferromagnetic insulators to optimally doped high-temperature superconductors as the doping level is varied. The experimental methods considered are primarily angular resolved photoelectron spectroscopy (ARPES), neutron scattering, and NMR. Two types of electronic structure calculations for data interpretation purposes are considered, namely, exact numerical methods for finite clusters (exact diagonalisation and the quantum Monte Carlo method) and approximate schemes for the infinite lattice. As a result, a coherent unified picture emerges, in which the magnetic polaron of a weakly doped antiferromagnetic lattice transforms into a system of Fermi particles dressed by short-range antiferromagnetic type spin fluctuations. In the region of weakly doped metal compositions, deviations from Fermi-liquid properties are seen, such as the failure of Luttinger's theorem, shadowy photoemission bands, and the spin pseudogap effect in spectral and thermodynamic measurements. The situation in the neighbourhood of the insulator-metal concentration transition is described as least understood.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S.
Заглавие : Quantum Monte Carlo investigation of the magnetic properties of weakly interacting antiferromagnetic chains with an alternating exchange interaction with spin S=1/2
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2000. - Vol. 90, Is. 1. - P194-201. - ISSN 1063-7761, DOI 10.1134/1.559075
Примечания : Cited References: 35
Предметные рубрики: PEIERLS COMPOUND CUGEO3
MAGNON DISPERSION
BI2CUO4
EXCITATIONS
RESONANCE
SYSTEMS
SCATTERING
DYNAMICS
NEUTRON
PHASE
Аннотация: An approximation dependence of the spontaneous magnetic moment at a site, sigma/sigma(0) - 1 = 0.71(6)delta(2.5(2)), and the antiferromagnet-singlet state phase boundary, J(2)/J(1) = 0.52(3)delta, are determined by the quantum Monte Carlo method in the self-consistent sublattice molecular field approximation for weakly interacting (J(2)) antiferromagnetic chains with spin S = 1/2 and alternating exchange interaction (J(1) +/- delta). The Neel temperature and a number of critical temperatures which could be related with the filling energy of two singlets (Delta S-z = 0) and one triplet (Delta S-z= 1) spin bands, each of which is split by the sublattice field (h(x,y)not equal h(z)) into two subbands, are determined on the basis of the computed correlation radii of the two- and four-spin correlation function, the squared total spin (S-z)(2) with respect to the longitudinal components, the dimerization parameter, and the correlation functions between the nearest neighbors with respect to longitudinal and transverse spin components. On the basis of the Monte Carlo calculations, the critical temperatures and possible energy gaps at the band center are determined for the antiferromagnets CuWO4 and Bi2CuO4 and for the singlet compounds (VO)(2)P2O7 and CuGeO3 , agreeing satisfactorily with existing results, and new effects are also predicted. (C) 2000 MAIK "Nauka / Interperiodica".
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Flerov I. N., Bondarev V. S., Sciau P., Savariault J. M.
Заглавие : Heat capacity and thermal expansion study of relaxor-ferroelectric Ba0.92Ca0.08Ti0.76Zr0.24O3
Разночтения заглавия :авие SCOPUS: Heat capacity and thermal expansion study of relaxor-ferroelectric Ba 0.92Ca0.08Ti0.76Zr0.24O3
Место публикации : J. Phys.: Condens. Matter. - 2004. - Vol. 16, Is. 39. - P.7143-7150. - ISSN 0953-8984, DOI 10.1088/0953-8984/16/39/045
Примечания : Cited References: 18
Предметные рубрики: CERAMICS
BA(TI1-XZRX)O-3
PEROVSKITES
Ключевые слова (''Своб.индексиров.''): calorimetry--dielectric properties--ferroelectric materials--perovskite--phase transitions--solid solutions--specific heat--thermal expansion--adiabatic calorimetry--frequency dispersion--polar domains--relaxor ferroelectrics--barium compounds
Аннотация: Heat capacity and thermal expansion of the Ba0.92Ca0.08Ti0.76Zr0.24O3 compound is measured using the methods of adiabatic calorimetry and optic-mechanical dilatometry in the temperature range 100-370 K. Three blurred anomalies on the C-p(T) and alpha(T) dependencies are observed in the temperature range 200-360 K. The results of the studies are discussed together with data on the structure and dielectric properties in the framework of spherical random bond-random field model.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Korshunov M. M., Gavrichkov V. A., Ovchinnikov S. G., Manske D., Eremin I.
Заглавие : Effective parameters of the band dispersion in n-type high-T-c superconductors
Разночтения заглавия :авие SCOPUS: Effective parameters of the band dispersion in n-type high-Tc superconductors
Место публикации : Physica C: ELSEVIER SCIENCE BV, 2004. - Vol. 402, Is. 4. - P365-370. - ISSN 0921-4534, DOI 10.1016/j.physc.2003.10.017
Примечания : Cited References: 32
Предметные рубрики: DOPED CUPRATE SUPERCONDUCTORS
TIGHT-BINDING METHOD
QUASI-PARTICLES
COPPER OXIDES
LA2-XSRXCUO4
SYMMETRY
MODEL
EVOLUTION
ORDER
Ключевые слова (''Своб.индексиров.''): high-t-c superconductivity--electronic correlations--electron-doped cuprates--electron-doped cuprates--electronic correlations--high-tc superconductivity--approximation theory--atomic physics--band structure--binding energy--charge transfer--correlation methods--doping (additives)--electronic structure--hamiltonians--mathematical models--mathematical operators--oxide superconductors--perturbation techniques--photoelectron spectroscopy--atomic orbitals--conduction band--electron doped cuprates--electron spins--valence band--high temperature superconductors
Аннотация: The electronic structure of electron-doped cuprates is discussed in the regions of small and optimal doping. For optimal doping we obtain the parameters from a simple tight-binding analysis by fitting ARPES data, and for small doping we study the band structure by the generalized tight-binding method that takes strong electronic correlations into account explicitly. This method has also reproduced well the ARPES data for small doping. The effective low-energy Hamiltonian is the t-t'-J model with hopping parameters t and t'. We compare both methods and find very good agreement for the value of t while t' is different because it is caused by the different contribution of the short-range spin correlations. (C) 2003 Elsevier B.V. All rights reserved.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Langmayr D., Biernat H. K., Erkaev N. V.
Заглавие : Influence of kappa-distributed ions on the two-stream instability
Разночтения заглавия :авие SCOPUS: Influence of κ-distributed ions on the two-stream instability
Место публикации : Phys. Plasmas: AMER INST PHYSICS, 2005. - Vol. 12, Is. 10. - Ст.102103. - ISSN 1070-664X, DOI 10.1063/1.2065370
Примечания : Cited References: 30
Предметные рубрики: QUASI-PERPENDICULAR SHOCKS
FIELD STREAMING INSTABILITY
DISPERSION FUNCTION
MIRROR INSTABILITY
SPACE PLASMAS
EQUILIBRIUM
Ключевые слова (''Своб.индексиров.''): electromagnetic wave propagation--electrostatics--magnetism--magnetization--growth rate--modified two-stream instability (mtsi)--two-stream instability--plasma stability
Аннотация: This paper is the first approach for analyzing the influence of kappa-distributed particles on the modified two-stream instability (MTSI). It is assumed that the plasma consists of a magnetized Maxwellian electron contribution and unmagnetized kappa-distributed ions drifting across the electrons. Within an electrostatic approximation, the influence of the kappa parameter on the maximum growth rate of the MTSI is evaluated for the special case of parallel drift velocity and wave propagation.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ovchinnikov S. G., Shneider E. I.
Заглавие : Effective Hamiltonian for HTSC cuprates taking into account electron-phonon interaction in the strong-correlation regime
Место публикации : J. Exp. Theor. Phys.: AMER INST PHYSICS, 2005. - Vol. 101, Is. 5. - P844-855. - ISSN 1063-7761, DOI 10.1134/1.2149064
Примечания : Cited References: 38. - This work was supported by the Russian Foundation for Basic Research (project no. 03-02-16124), the program “Quantum Macrophysics” of the Presidium of the Russian Academy of Sciences, the Foundation in Support for Russian Science, the Foundation of Noncommercial
Предметные рубрики: HIGH-TEMPERATURE SUPERCONDUCTORS
D-WAVE SUPERCONDUCTIVITY
T-C
DISPERSION
SCATTERING
OXIDES
STATE
MODEL
Ключевые слова (''Своб.индексиров.''): electron beams--electronic structure--optimization--phonons--electron correlations--hubbard x operators--spin-photon interaction--hamiltonians
Аннотация: Electron-phonon interaction is sequentially derived from a realistic p-d multiband model for the cuprates under conditions of strong electron correlations. The electronic structure is described using the representation of the Hubbard X operators in a generalized tight-binding method. Dependences of the diagonal and off-diagonal (on lattice sites) matrix elements of electron-phonon interaction on the wavevectors are found for three phonon modes, namely, breathing, apical breathing, and bending modes. The interactions of the breathing and bending modes with electrons are shown to contribute to the formation of kinks in the (0; 0)-(pi; pi) and (0; 0)-(pi; 0) directions, respectively. A low-energy t-J* model with phonons is developed; apart from electron-phonon interaction, it also includes spin-phonon interaction. The elimination of phonons gives an effective electron-electron interaction that depends on the occupation number of a multielectron term and on the carrier concentration due to strong electron correlations. (c) 2005 Pleiades Publishing, Inc.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A., Timofeev I. V., Shabanov A. V., Vetrov S. Ya., Timofeev V. P.
Заглавие : Photonic crystals with resonantly absorbing defects
Коллективы : International Conference on Laser and Fiber-Optical Networks Modeling (8; 2006 ; Jun 29-Jul 01; Kharkiv)
Место публикации : LFNM 2006: 8th International Conference on Laser and Fiber-Optical Networks Modeling, Proceedings: IEEE, 2006. - P.313-316. - ISBN 1-4244-0233-6
Примечания : Cited References: 12
Предметные рубрики: MICROCAVITIES
DISPERSION
SPECTRA
Ключевые слова (''Своб.индексиров.''): photonic crystal--photonic band gap--resonantly absorbing gas--light localization
Аннотация: We show that the defect mode of photonic crystal with resonantly absorbing gas in defect is splitted due to effects of linear absorption and dispersion of resonant atoms. The splitting and shape of the lines is very sensitive to an incidence-angle of radiation on PC. The cases of one and two defects are considered.
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Arkhipkin V. G., Myslivets S. A., Timofeev I. V.
Заглавие : Effect of electromagnatically induced transparency on spectrum of defect modes of photonic crystal - art. no. 67292H
Коллективы : International Conference on Coherent and Nonlinear Optics
Место публикации : ICONO 2007: Coherent and nonlinear optical phenomena. Ser. proceedings of the society of photo-optical instrumentation engineers (SPIE)/ International Conference on Coherent and Nonlinear Optics (2007): SPIE-Int. Soc. Optical Engineering, 2007. - Vol. 6729. - P.H7292-H7292. - ISBN 0277-786X, DOI 10.1117/12.751966. - ISBN 978-0-8194-6886-4
Примечания : Cited References: 33
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
NONLINEAR OPTICS
COHERENT MEDIA
LIGHT
MICROCAVITIES
PULSES
Ключевые слова (''Своб.индексиров.''): photonic crystal--defect mode--photonic band gap--localized mode--electromagnetically induced transparency--defect mode--electromagnetically induced transparency--localized mode--photonic band gap--photonic crystal--crystal defects--dispersion (waves)--electromagnetic field effects--transparency--photonic crystals
Аннотация: The effect of electromagnetically induced transparency on the spectrum of defect modes of one-dimensional photonic crystal is discussed theoretically. Narrowing of defect mode linewidth is predicted due to nonabsorbing highly dispersive medium in defect layer.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Prediction of compounds related to InFeZn2O5
Место публикации : J. Struct. Chem. - 2008. - Vol. 49, Is. 1. - P.42-46. - ISSN 0022-4766, DOI 10.1007/s10947-008-0006-7
Примечания : Cited References: 17
Предметные рубрики: DIELECTRIC-DISPERSION
ERFE2O4
LUFE2O4
Ключевые слова (''Своб.индексиров.''): crystal--hexagonal layered structures--prediction of compounds
Аннотация: The results of crystal-chemical analysis of layered hexagonal structures related to InFeZn2O5 and having space group P6(3)/mmc are reported. It was found that more than 250 new compounds could be synthesized. Multilayered compounds of other compositions are possible.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Davydov V. Yu., Klochikhin A. A., Smirnov A. N., Strashkova I. Y., Krylov A. S., Lu H., Schaff W. J., Lee H. M., Hong Y. L., Gwo S.
Заглавие : Selective excitation of E-1(LO) and A(1)(LO) phonons with large wave vectors in the Raman spectra of hexagonal InN
Коллективы : RFBR [09-02-01280]; NSC-RFBR [08-02-92003-HHC]
Разночтения заглавия :авие SCOPUS: Selective excitation of E1 (LO) and A1 (LO) phonons with large wave vectors in the Raman spectra of hexagonal InN
Место публикации : Phys. Rev. B. - 2009. - Vol. 80, Is. 8. - Ст.81204. - ISSN 1098-0121, DOI 10.1103/PhysRevB.80.081204
Примечания : Cited References: 15. - We are thankful to B. N. Mavrin and A. N. Vtyurin for the arrangement NIR measurements and S. A. Permogorov for the critical reading of the manuscript. This work was supported by RFBR (Grant No. 09-02-01280), NSC-RFBR (Grant No. 08-02-92003-HHC), and the Program of RAS "New materials and structures."
Предметные рубрики: SCATTERING
RESONANCE
Ключевые слова (''Своб.индексиров.''): iii-v semiconductors--indium compounds--phonon dispersion relations--raman spectra--wide band gap semiconductors
Аннотация: It is shown that dispersions of E-1(LO) and A(1)(LO) modes of InN can be restored in a wide interval of wave vectors by studying impurity-induced first-order Raman scattering as a function of exciting light energy. It is also shown that due to the resonance character of scattering the observed phonon energies correspond to the wave vectors strictly defined by exciting photon energies. The frequencies of E-1(LO) and A(1)(LO) phonons at the Gamma point obtained by extrapolation to zero wave vectors were found to be 604 and 592 cm(-1), respectively.
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