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1.


    OVCHINNIKOV, S. G.
    DENSITY OF SINGLE-PARTICLE STATES IN STRONGLY CORRELATED ELECTRON-SYSTEMS IN COPPER OXIDES / S. G. OVCHINNIKOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1993. - Vol. 104, Is. 5. - P. 3719-3734. - Cited References: 24 . - ISSN 0044-4510
РУБ Physics, Multidisciplinary
Рубрики:
DYNAMIC PROPERTIES
   BAND
   SPECTRA
   MODEL

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2.


    Ovchinnikov, S. G.
    Density of hole-doped states in strongly correlated electron-systems of copper oxides / S. G. Ovchinnikov // Phys. Rev. B. - 1994. - Vol. 49, Is. 14. - P. 9891-9897, DOI 10.1103/PhysRevB.49.9891. - Cited References: 34 . - ISSN 0163-1829
РУБ Physics, Condensed Matter
Рубрики:
DYNAMIC PROPERTIES
   SUPERCONDUCTIVITY
   GAP
   LA2CUO4
   BI2SR2CACU2O8
   PHOTOEMISSION
   SPECTROSCOPY
   SPECTRA
   MODEL
   BAND
Аннотация: A generalized tight-binding method to calculate quasiparticle band structure and density of states in strongly correlated systems is presented. The band structures of undoped and weakly hole-doped CuO2 layer are calculated. The insulator gap has a charge transfer nature with a minor contribution from a Cu-O Coulomb interaction. Doping results in the appearance of an in-gap state with a simultaneous decrease of the density of states at the band edges in agreement with small cluster results and experimental data.

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Держатели документа:
L. V. Kyrensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Овчинников, Сергей Геннадьевич
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3.


    OVCHINNIKOV, S. G.
    EFFECT OF SUBSTITUTIONAL IMPURITY SPECIES ON THE SUPPRESSION OF MAGNETIC-PROPERTIES OF WEAKLY DOPED COPPER OXIDES / S. G. OVCHINNIKOV // Fiz. Tverd. Tela. - 1994. - Vol. 36, Is. 5. - P. 1307-1310. - Cited References: 16 . - ISSN 0367-3294
РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC-STRUCTURE
   SUPERCONDUCTIVITY
   LA2CUO4
   EXCITATIONS
   SPECTRA

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4.


    Churilov, G. N.
    Preparation of fullerenes and nanotubes in coal plasma jet in kilohertz frequency range / G. N. Churilov, A. Y. Korets, Y. N. Titarenko // Zhurnal Tek. Fiz. - 1996. - Vol. 66, Is. 1. - P. 191-194. - Cited References: 6 . - ISSN 0044-4642
РУБ Physics, Applied
Рубрики:
SPECTRA
   CARBON

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Доп.точки доступа:
Korets, A. Y.; Titarenko, Y. N.
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5.


    Novikov, P. V.
    Characteristics of the heating dynamics of a graphite conductor taking into account the skin effect / P. V. Novikov, G. N. Churilov // Tech. Phys. - 2000. - Vol. 45, Is. 9. - P. 1214-1218, DOI 10.1134/1.1318113. - Cited References: 13 . - ISSN 1063-7842
РУБ Physics, Applied
Рубрики:
FULLERENES
   C-60
   SPECTRA
Аннотация: Calculations for a one-dimensional model of RF heating of a cylindrical graphite conductor have been carried out. The heating dynamics are analyzed in the general form. Conductor temperature profiles and the times for heating up to the graphite sublimation temperature as a function of current and frequency have been obtained. A model of conductor heating with partial return of the energy irradiated by the conductor surface has been considered. Frequency and current ranges have been determined to carry out this graphite sublimation method in a chamber with reflecting walls. The problem is associated with carbon vapor production and subsequent synthesis of fullerenes and other carbon structures. (C) 2000 MAIK "Nauka/ Interperiodica".

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Держатели документа:
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Churilov, G. N.; Чурилов, Григорий Николаевич
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6.


   
    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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7.


    Belyaev, B. A.
    Dielectric and optical properties of a 5-propyl-2-(p-cyanophenyl)-pyridine liquid crystal / B. A. Belyaev, N. A. Drokin, V. F. Shabanov // Phys. Solid State. - 2003. - Vol. 45, Is. 4. - P. 797-801, DOI 10.1134/1.1569024. - Cited References: 12 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
DECIMETER WAVELENGTH RANGE
   SERIES
   SPECTRA
   5CB
Аннотация: The temperature dependences of the dielectric and optical parameters for a 5-propyl-2-(p-cyanophenyl)-pyridine (3CP) liquid crystal are investigated in the vicinity of the nematic-isotropic phase transition. The dielectric spectra of the 3CP compound in the crystalline, nematic, and isotropic phases are measured in the frequency range 1-1000 MHz, and the Debye approximations of the measured spectra are obtained. Analysis of the dependence of the static permittivity on the director orientation with respect to the direction of the electric pump field demonstrates that the angle between the dipole moment and the long axis of the molecule is approximately equal to 15degrees. (C) 2003 MAIK "Nauka / Interperiodica".

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

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Shabanov, V. F.; Шабанов, Василий Филиппович; Беляев, Борис Афанасьевич
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8.


   
    Prediction of the in-gap states above the top of the valence band in undoped insulating cuprates due to the spin-polaron effect / S. G. Ovchinnikov [et al.] // J. Phys.: Condens. Matter. - 2004. - Vol. 16, Is. 8. - P. L93-L100, DOI 10.1088/0953-8984/16/8/L04. - Cited References: 25 . - ISSN 0953-8984
РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC-STRUCTURE
   LA2-XSRXCUO4
   MODEL
   ANTIFERROMAGNETISM
   SPECTRA
   OXIDES
Кл.слова (ненормированные):
Quasiparticle band structure -- Spin-polaron effect -- Antiferromagnetic materials -- Approximation theory -- Doping (additives) -- Electronic structure -- Hamiltonians -- Insulation -- Magnetic fields -- Strontium compounds -- Thermal effects -- Lanthanum compounds
Аннотация: In the framework of the generalized tight binding method we have calculated the quasiparticle band structure and the spectral functions of the undoped cuprates such as La2CuO4, Sr2CUO2Cl2 etc. Due to spin fluctuations the in-gap state appears above the top of the valence band in the undoped antiferromagnetic insulator similar to in-gap states induced by hole doping. In the ARPES experiments the in-gap states can be detected as weak low energy satellites.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L V Kirensky Institute of Physics, Siberian Branch, Russian Academy of Science, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Borisov, A. A.; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Korshunov, M. M.; Коршунов, Максим Михайлович
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9.


   
    Multiple-quantum-well-based photonic crystals with simple and compound elementary supercells / E. L. Ivchenko [et al.] // Phys. Rev. B. - 2004. - Vol. 70, Is. 19. - Ст. 195106, DOI 10.1103/PhysRevB.70.195106. - Cited References: 33 . - ISSN 1098-0121
РУБ Physics, Condensed Matter
Рубрики:
EXCITON POLARITONS
   DIELECTRIC MEDIUM
   OPTICAL LATTICES
   BRAGG STRUCTURES
   BAND-STRUCTURES
   PERIODIC-BRAGG
   REFLECTION
   ABSORPTION
   SPECTRA
   ARRAYS
Кл.слова (ненормированные):
article -- crystal -- crystal structure -- elementary particle -- light scattering -- mathematical analysis
Аннотация: Exciton polaritons in one-dimensional photonic crystals based on multiple quantum well structures are investigated. The effects due to interplay between resonant interaction of light with quantum well excitons, and light scattering from well-barrier interface, are elucidated. Polariton dispersion equations and reflection spectra in structures with two wells in an elementary supercell of the periodic structure are studied. Several examples of different compound elementary supercells are considered. Special attention is paid to structures with the period or the distance between quantum wells satisfying the resonance Bragg condition. Such structures are characterized by a presence of a larger-than-usual polariton stop band. It is shown that in structures with a complex elementary supercell, the width of such a stop band can be significantly enhanced in comparison to that in simple structures.

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Держатели документа:
AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
CUNY Queens Coll, Dept Phys, Flushing, NY 11367 USA
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
A.F. Ioffe Phys.-Technical Institute, RAS Politekhnicheskaya Str. 26, St. Petersburg, 194021, Russian Federation
Physics Department, Queens College, City University of New York, Flushing, NY 11367, United States
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Ivchenko, E. L.; Voronov, M. M.; Erementchouk, M. V.; Deych, L. I.; Lisyansky, A. A.
}
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10.


   
    The mechanism of suppression of strong electron correlations in FeBO3 at high pressures / A. G. Gavriliuk [et al.] // J. Exp. Theor. Phys. - 2004. - Vol. 99, Is. 3. - P. 566-573, DOI 10.1134/1.1809686. - Cited References: 18 . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
MAGNETIC COLLAPSE
   TRANSITION
   SPECTRA
   ABSORPTION
   STATE
Кл.слова (ненормированные):
Crystal structure -- High pressure effects -- Light absorption -- Parameter estimation -- Phase transitions -- Spectrum analysis -- Crystal field -- Electron correlations -- Generalized tight binding method -- Hybridization -- Iron compounds
Аннотация: The optical absorption spectra of iron borate (FeBO3) are measured at high pressures up to P = 82 GPa. A mechanism of suppression of strong electron correlations is proposed within the framework of the generalized tight binding method, which leads to the experimentally observed magnetic, electronic, and structural phase transitions. Taking into account peculiarities of the crystal structure of FeBO3 and the strong s-p hybridization of boron and oxygen, it is established that, as the distance between ions varies with increasing pressure, the crystal field parameter begins to play a decisive role in the electron transitions, while the influence of the d band broadening is negligibly small. Parameters of the theory are calculated as functions of the pressure. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, Shubnikov Inst Crystall, Moscow, Russia
Russian Acad Sci, Inst High Pressure Phys, Troitsk 142092, Russia
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333, Russian Federation
Institute of High-Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow region, 142092, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Gavriliuk, A. G.; Trojan, I. A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lyubutin, I. S.; Sarkisyan, V. A.
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