Главная
Авторизация
Фамилия
Пароль
Регистрация
Библиотека института физики им. Л.В. Киренского СО РАН
Базы данных
Труды сотрудников ИФ СО РАН - результаты поиска
Вид поиска
Каталог книг и брошюр библиотеки ИФ СО РАН
Каталог журналов библиотеки ИФ СО РАН
Труды сотрудников ИФ СО РАН
Область поиска
Ключевые слова
Автор
Заглавие
Год издания
Место работы автора
в найденном
Найдено в других БД:
Каталог книг и брошюр библиотеки ИФ СО РАН (18)
Формат представления найденных документов:
полный
информационный
краткий
Отсортировать найденные документы по:
автору
заглавию
году издания
типу документа
Поисковый запрос:
(<.>K=Superconductors<.>)
Общее количество найденных документов
:
228
Показаны документы
с 1 по 20
1.
Superconductivity near liquid
nitrogen temperature in the Sn-Ba-Sr-Y-Cu-O system / K. S. Aleksandrov [et al.]> // Physica C-Superconductivity and its Applications. - 1989. -
Vol. 161
,
Is. 4
. - P. 493-496,
DOI
10.1016/0921-4534(89)90087-7 . - ISSN 0921-4534
Кл.слова (ненормированные):
Ceramic Materials
--
Tin Compounds
--
Bulk Superconductivity
--
High Temperature
Superconductors
--
Oxide
Superconductors
--
Tin Barium Strontium Yttrium Copper Oxide
--
Superconducting Materials
Аннотация:
A high-Tc phase was found in the Sn-Ba-Sr-Y-Cu-O system. DC susceptibility data of Sn2Ba2Sr0.5Y0.5Cu3Ox show a single transition to bulk superconductivity with an onset temperature of 86 K. В© 1989.
Scopus
Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Khrustalev, B. P.; Хрусталев, Борис Петрович; Krivomazov, S. N.; Петров, Михаил Иванович; Petrov, M. I.; Vasilyev, A. D.; Zwegintsev, S. A.
}
Найти похожие
2.
Synthesis and physical-properties
of high-temperature
superconductors
of system Tl-Ca-Ba-Cu-O / G. A. Petrakovskii [et al.]> // Izvestiya vysshikh uchebnykh zavedenii Fizika. - 1990. -
Vol. 33
,
Is. 9
. - P.+. 18-22 ; Russian Physics Journal ; Известия высших учебных заведений. Физика. - Cited References: 6 . - ISSN 0021-3411
РУБ
Physics, Multidisciplinary
WOS
Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Volkov, V. Y.; Patrin, G. S.; Патрин, Геннадий Семёнович; Bidman, T. A.; Kiselev, N. I.; Vasilyev, V. N.
}
Найти похожие
3.
Ovchinnikov, S. G.
Symmetry of holes in high-temperature
superconductors
/ S. G. Ovchinnikov> // Solid State Commun. - 1991. -
Vol. 77
,
Is. 3
. - P. 221-224,
DOI
10.1016/0038-1098(91)90336-T. - Cited References: 19 . - ISSN 0038-1098
РУБ
Physics, Condensed Matter
Рубрики:
FERMI-LIQUID STATES
X-RAY ABSORPTION
ELECTRONIC-STRUCTURE
PHOTOEMISSION
BI2SR2CACU2O8
BISMUTH
Аннотация:
A symmetry of holes is investigated in the multielectron band theory which takes into account strong correlations. It is shown that a small number of d(z2) states appears near the Fermi level due to d(z2) Cu-2p(x(y))O charge transfer as admixture to d(x2-y2)-p(x(y)) bands with dominant contribution of O2p states. The results are in a qualitative agreement with polarized photoemission data.
WOS
,
Scopus
Держатели документа:
L.V. Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
Найти похожие
4.
Ovchinnikov, S. G.
Quasi-particle spectrum in copper oxides / S. G. Ovchinnikov, G. A. Petrakovsky> // J. Supercond. - 1991. -
Vol. 4
,
Is. 6
. - P. 437-448,
DOI
10.1007/BF00635862. - Cited References: 0 . - ISSN 0896-1107
РУБ
Physics, Applied + Physics, Condensed Matter
Кл.слова (ненормированные):
ELECTRON CORRELATIONS
--
ELECTRON ENERGY STRUCTURE
--
COPPER OXIDE
--
PHOTOEMISSION DATA
--
copper oxide
--
Electron correlations
--
electron energy structure
--
photoemission data
--
Ceramic Materials
--
Lanthanum Compounds
--
Fermi Liquid
--
Lanthanum Strontium Copper Oxides
--
Oxide
Superconductors
--
Quasi Particles
--
High Temperature
Superconductors
Аннотация:
The results of electronic structure calculations of the CuO2 layer, performed by the generalized tight-binding method, are presented. The strong electron correlations on both the Cu and O ions are included explicitly. The resulting quasiparticle band structure contains an insulator gap for undoped compounds like La2CuO4. The valence band consists of a large number of narrow Hubbard quasiparticle bands. The dispersion law of quasiparticles at the top of the valence band has a minimum at the GAMMA-point, indicating the existence of the multivalley Fermi surface in the doped La2-xSrxCuO4. The origin of the Fermi liquid behavior in the narrow quasiparticle bands is discussed.
WOS
,
Scopus
Держатели документа:
L. V. Kirensky Institute of Physics, Siberian Department of the USSR Academy of Sciences, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Petrakovsky, G. A.; Петраковский, Герман Антонович; Овчинников, Сергей Геннадьевич
}
Найти похожие
5.
Improper ferroelectric phase
due to condensation of two order parameters in crystals of high-temperature
superconductors
/ G. M. Chechin [et al.]> // Ferroelectrics. - 1992. -
Vol. 130
,
Is. 1
. - P. 155-162. - Cited References: 21 . - ISSN 0015-0193
Рубрики:
TRANSITIONS
FERROELASTICS
RB3CD2CL7
Кл.слова (ненормированные):
Ceramic materials
--
Crystals
--
Ferroelectricity
--
Phase diagrams
--
Order parameters
--
Oxide
superconductors
--
High temperature
superconductors
Аннотация:
Using group-theoretical methods it is shown that improper ferroelectric phase may arise in high-temperature
superconductors
(HTSC) where high-symmetry phases have space groups D4h1 or D4h17. Their appearance is caused by condensation of order parameters (OP's) transforming two irreducible representations (IR's). The most typical phase diagrams are considered, as well as temperature dependence of OP's and the basic structural mechanism of the ferroelectricity arising in the HTSC.
Scopus
,
WOS
,
Смотреть статью
Держатели документа:
Rostov-on-Don Univ, Rostov, Russian Federation
Доп.точки доступа:
Chechin, G. M.; Sakhnenko, V. P.; Misyul, S. V.; Мисюль, Сергей Валентинович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
6.
A study of
the hysteresis property of the current voltage characteristic in high-temperature
superconductors
/ М. И. Петров [et al.]> // Solid State Commun. - 1992. -
Vol. 82
,
Is. 6
. - P. 453-456,
DOI
10.1016/0038-1098(92)90748-X. - Cited References: 21 . - ISSN 0038-1098
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-TC
SUPERCONDUCTORS
YBA2CU3O7-X
FILMS
Аннотация:
Temperature measurements of current-voltage characteristics (CVC) of the (Y, Lu)1Ba2Cu3O7-delta high-temperature superconductor have been performed. Analysis of the data shows that CVC of HTSC is mainly formed by two mechanisms: the creep of the Abrikosov vortices inside the crystallites and the Andreev reflection of the carriers within the metal character boundary between the crystallites.
WOS
Держатели документа:
Институт физики им. Л.В. Киренского СО РАН
Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Krivomazov, S. N.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
7.
VALKOV, V. V.
MAGNETIZATION OF GRANULATED HTSC IN INTENSE MAGNETIC-FIELDS / V. V. VALKOV, B. P. KHRUSTALEV> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. -
Vol. 107
,
Is. 4
. - P. 1221-1231. - Cited References: 18 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
Рубрики:
CRITICAL-STATE MODEL
HIGH-TEMPERATURE
SUPERCONDUCTORS
HIGH-TC
SUPERCONDUCTORS
WOS
Доп.точки доступа:
KHRUSTALEV, B. P.
}
Найти похожие
8.
Ovchinnikov, S. G.
EFFECT OF ANTIFERROMAGNETIC ORDERING ON ZONE STRUCTURE OF LA2CUO4 / C. G. OVCHINNIKOV> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. -
Vol. 107
,
Is. 3
. - P. 796-811. - Cited References: 42 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
Рубрики:
HIGH-TC
SUPERCONDUCTORS
ELECTRONIC-STRUCTURE
OXIDE
SUPERCONDUCTORS
CHARGE-TRANSFER
CUO2 PLANE
MODEL
HOLE
SPECTRUM
STATE
WOS
Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
Найти похожие
9.
Ovchinnikov, S. G.
Effects of intense electron correlations on x-ray and x-ray electron copper spectra of high-temperature
superconductors
/ S. G. Ovchinnikov, P. V. Avramov> // Fiz. Tverd. Tela. - 1995. -
Vol. 37
,
Is. 9
. - P. 2559-2567. - Cited References: 22 . - ISSN 0367-3294
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-ENERGY SPECTROSCOPY
HIGH-TC
SUPERCONDUCTORS
SATELLITES
LA2CUO4
OXIDES
HOLES
STATE
WOS
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Овчинников, Сергей Геннадьевич
}
Найти похожие
10.
Ovchinnikov, S. G.
Spin excitons - A new mechanism of superconducting pairing in copper oxides / S. G. Ovchinnikov> // JETP Letters. - 1996. -
Vol. 64
,
Is. 1
. - P. 25-31,
DOI
10.1134/1.567153. - Cited References: 22 . - ISSN 0021-3640
РУБ
Physics, Multidisciplinary
Рубрики:
HIGH-TC
SUPERCONDUCTORS
SINGLET-TRIPLET MODEL
LA2-XSRXCUO4
SR2CUO2CL2
PLANE
Аннотация:
The Fermi and Bose quasiparticle spectrum in copper oxides is studied in a many-band p-d model taking account of the strong electronic correlations. It is shown that hole-doped systems possess a Bose mode - a spin exciton - which is associated with the singlet-triplet excitation of the two-hole ground-state term of CuO4 clusters. Intercluster hopping leads to fermion-boson interaction with a spin exciton as the intermediate boson. Such a mechanism does not exist for n-type systems. (C) 1996 American Institute of Physics.
WOS
,
Scopus
Держатели документа:
L. V. Kirenskii Institute of Physics, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
Найти похожие
11.
Critical currents in
bulk Y3/4Lu1/4Ba2Cu3O7+BaPbO3 composites / M. I. Petrov [et al.]> // Phys. Lett. A. - 1997. -
Vol. 237
,
Is. 1-2
. - P. 85-89,
DOI
10.1016/S0375-9601(97)00694-4. - Cited References: 24 . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
HIGH-TC-
SUPERCONDUCTORS
WEAK LINKS
JUNCTIONS
Кл.слова (ненормированные):
YBaCuO+BaPbO3 bulk composites
--
network of weak S-N-S links
--
critical current density
Аннотация:
Bulk composites Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 with BaPbO3 volume content of 0-60% have been prepared. Temperature dependences of resistance and critical current density J(c)(T) are presented. The best agreement of experimental J(c)(T) with theory has been reached for the Gunsenheimer-Schussler-KUmmel consideration of superconductor-normal metal-superconductor (S-N-S) junctions in the "clean" limit. (C) 1997 Elsevier Science B.V.
WOS
Держатели документа:
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Shaihutdinov, K. A.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
12.
Aleksandrov, K. S.
Hierarchies of perovskite-like crystals (Review) / K. S. Aleksandrov, V. V. Beznosikov> // Phys. Solid State. - 1997. -
Vol. 39
,
Is. 5
. - P. 695-715,
DOI
10.1134/1.1130120. - Cited References: 143 . - ISSN 1063-7834
Рубрики:
CU-O SYSTEM
HIGH-PRESSURE SYNTHESIS
SUPERCONDUCTING COPPER OXIDES
STRUCTURAL PHASE-TRANSITIONS
NEUTRON POWDER DIFFRACTION
SINGLE-CRYSTAL
X-RAY
CUPRATE
SUPERCONDUCTORS
DIELECTRIC-PROPERTIES
HOMOLOGOUS SERIES
Аннотация:
A system of mutual relationships (a hierarchy) is constructed between various perovskite-like crystal structures based on available structural data. All the perovskite-like structures are characterized by a common indicator of their relationship-the presence of layers, stacks, or frameworks made up of BX6 octahedra linked at their vertices (where B is a cation, X is an anion) or fragments of octahedra in the form of BX5 pyramids or BX4 squares in anion-deficient compounds. In layered structures, these stacks are joined to each other by various intermediate blocks. It is well known that one homological series of compounds is constructed by increasing the number of layers in a stack while preserving the same kind of connecting block. Crystals of various series that contain identical stacks (but different blocks of one or two types) can also be related to one another via this feature. The hierarchical system includes compounds with small distortions in their structures for various reasons. (C) 1997 American Institute of Physics.
WOS
Публикация на русском языке
Александров, Кирилл Сергеевич. Иерархия перовскитоподобных кристаллов (Обзор) [Текст] / К. С. Александров, Б. В. Безносиков // Физ. тверд. тела. - Санкт-Петербург, 1997. - Т. 39 Вып. 5. - С. 785-808
Доп.точки доступа:
Beznosikov, B. V.; Безносиков, Борис Валерьевич; Александров, Кирилл Сергеевич
}
Найти похожие
13.
Valkov, V. V.
Influence of antiferromagnetic ordering on the de Haas-van Alphen effect in a semimetal / V. V. Valkov, D. M. Dzebisashvili> // Phys. Solid State. - 1997. -
Vol. 39
,
Is. 2
. - P. 179-184,
DOI
10.1134/1.1129779. - Cited References: 19 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE
SUPERCONDUCTORS
NORMAL STATE
OSCILLATIONS
CEAS
Аннотация:
The distinctive characteristics of the de Haas-van Alphen effect in semimetals with antiferromagnetic long-range order are investigated theoretically. It is shown that the transition of the subsystem of localized spins from the canted antiferromagnetic phase to the ferromagnetic phase is accompanied by an abrupt change in the ''frequency'' of the magnetization oscillations of band carriers M-similar to. In the below-critical range of magnetic fields, M-similar to is not a function periodic in 1/H. Significantly, the additional contribution to the phase of the oscillatory factors is proportional to H-2 and is determined entirely by quantum fluctuations in the antiferromagnetic subsystem. (C) 1997 American Institute of Physics.
WOS
,
Scopus
Держатели документа:
L.V. Kirenskii Inst. of Phys., Siberian Br. Russ. Acad. of Sci., 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Val'kov, V. V.
}
Найти похожие
14.
Critical currents in
bulk Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 composites / M. I. Petrov [et al.]> // Physics Letters, Section A: General, Atomic and Solid State Physics. - 1997. -
Vol. 237
,
Is. 1-2
. - P. 85-89
Рубрики:
HIGH-TC-
SUPERCONDUCTORS
WEAK LINKS
JUNCTIONS
Кл.слова (ненормированные):
Bulk composites
--
Critical current density
--
Network of weak S-N-S links
--
YBaCuO + BaPbO3
--
YBaCuO+BaPbO3 bulk composites
--
network of weak S-N-S links
--
critical current density
Аннотация:
Bulk composites Y3/4Lu1/4Ba2Cu3O7 + BaPbO3 with BaPbO3 volume content of 0-60% have been prepared. Temperature dependences of resistance and critical current density Jc(T) are presented. The best agreement of experimental Jc(T) with theory has been reached for the Gunsenheimer-Schussler-Kummel consideration of superconductor-normal metal-superconductor (S-N-S) junctions in the "clean" limit. В© 1997 Elsevier Science B.V.
Scopus
,
WOS
Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Оспищев С. В.; Шайхутдинов, Кирилл Александрович; Shaikhutdinov, K. A.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
15.
Thermally activated phase
slippage in composites HTSC + CuO / M. I. Petrov [et al.]> // Physica C-Superconductivity and its Applications. - 1997. -
Vol. 282
,
Is. PART 4
. - P. 2453-2454 . - ISSN 0921-4534
Кл.слова (ненормированные):
Copper oxides
--
Critical currents
--
Thermal effects
--
Thermally activated phase slippage (TAPS)
--
High temperature
superconductors
Аннотация:
The effect of thermally activated phase slippage (TAPS) in composites HTSC + CuO has been studied. The experimental ?(T) dependences have been treated within framework of TAPS using temperature dependences of critical current for tunnel S-I-S junctions.
Scopus
Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Шайхутдинов, Кирилл Александрович; Shaikhutdinov, K. A.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
16.
The effect of
nonmagnetic and magnetic impurities in the normal metal layer - N of network of weak S-N-S junctions in composites on high temperature
superconductors
basis / M. I. Petrov [et al.]> // Physica C-Superconductivity and its Applications. - 1997. -
Vol. 282
,
Is. PART 4
. - P. 2447-2448 . - ISSN 0921-4534
Кл.слова (ненормированные):
Charge carriers
--
Composite materials
--
Electric currents
--
High temperature
superconductors
--
Impurities
--
Magnetic materials
--
Transport properties
--
Superconducting normal metal superconducting junctions
--
Superconducting devices
Аннотация:
Composites HTSC + normal metal with magnetic and nonmagnetic impurities have been prepared. Transport properties of these composites have been studied. Supercurrent in the composites is weakened by magnetic impurities in greater degree than by nonmagnetic ones. It indicates that carriers in HTSC with 1-2-3 structure are mostly the conventional singlet pairs.
Scopus
Доп.точки доступа:
Петров, Михаил Иванович; Petrov, M. I.; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Оспищев С. В.; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
17.
Ovchinnikov, S. G.
Quasiparticles in strongly correlated electronic systems in cuprate oxides / S. G. Ovchinnikov> // Uspekhi Fiz. Nauk. - 1997. -
Vol. 167
,
Is. 10
. - P. 1043-1068. - Cited References: 227 . - ISSN 0042-1294
РУБ
Physics, Multidisciplinary
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.
WOS
Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
Найти похожие
18.
Transport properties of
composites high temperature superconductor + semiconductor with different carrier concentration / M. I. Petrov [et al.]> // Physica C-Superconductivity and its Applications. - 1997. -
Vol. 282
,
Is. PART 4
. - P. 2449-2450 . - ISSN 0921-4534
Кл.слова (ненормированные):
Carrier concentration
--
Critical current density (superconductivity)
--
High temperature
superconductors
--
Semiconductor materials
--
Thermal effects
--
Transport properties
--
Superconductor semiconductor superconductor junctions
--
Composite materials
Аннотация:
Composites HTSC + semiconductor with different carrier concentrations were prepared as a model of Josephson type contacts. Experimental temperature dependences of the critical current density Jc(T) in the composites are presented. The best congruence of experiment with theory was reached for the Schussler-Kummel consideration of Andreev scattering in S-Sm-S (S-superconductor, Sm-semiconductor) junctions.
Scopus
Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Khrustalev, B. P.; Хрусталев, Борис Петрович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
Найти похожие
19.
Gavrichkov, V. A.
Low-energy electron spectrum in copper oxides in the multiband p-d model / V. A. Gavrichkov, S. G. Ovchinnikov> // Phys. Solid State. - 1998. -
Vol. 40
,
Is. 2
. - P. 163-168,
DOI
10.1134/1.1130262. - Cited References: 31 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-TC
SUPERCONDUCTORS
SR2CUO2CL2
STATES
PLANES
Аннотация:
An exact diagonalization of the Hamiltonian in the p-d model of a CuO6 cluster was used to obtain dependences on the model parameters of the lowest-energy two-hole terms: the energy difference between the 2p orbitals of planar and apical oxygen Delta(apex) = epsilon(2p) - epsilon[2p(apex)], the crystal field parameter Delta(d) = epsilon(3z2-r2)-epsilon(x2-y2), and the ratio of the distances between the copper atom and the apical and planar oxygen atoms d(apex)/d(pl). In the limit of large d(apex)/d(pl) and Delta(d), OUT model is equivalent to the three-band p-d model and, in this case, large singlet-triplet splitting Delta epsilon greater than or equal to 1 eV is also observed. As the parameters decrease, a singlet-triplet crossover is observed. Two mechanisms are identified for stabilization of the tripler term B-3(1g)(0) as the ground state. It is shown that for realistic values of the parameters, reduction of the p-d model to the three-band model is limited by the low energies of the current excitations because of the presence of the lower excited B-3(1g), and (1)A(1g) cluster states. Intercluster hopping causes strong mixing of singlet and triplet states far from the Gamma point. The results of the calculations are compared with data obtained by angle-resolved photoelectron emission in Sr2CuO2Cl2. (C) 1998 American Institute of Physics.
WOS
,
Scopus
,
Читать в сети ИФ
Держатели документа:
LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Гавричков, Владимир Александрович
}
Найти похожие
20.
Short-circuit current limiter
utilizing a high-T-c superconductor / M. I. Petrov [et al.]> // Tech. Phys. - 1998. -
Vol. 43
,
Is. 10
. - P. 1255-1256,
DOI
10.1134/1.1259166. - Cited References: 6 . - ISSN 1063-7842
РУБ
Physics, Applied
Рубрики:
HIGH-TEMPERATURE
SUPERCONDUCTORS
Аннотация:
Experimental data are given on a prototype short-circuit current limiter utilizing a polycrystalline high-T-c superconductor of composition Y1Ba2Cu3O7-delta. The limiter comprises a series-connected de circuit element immersed in liquid nitrogen. To improve the efficiency, a polycrystalline high-T-c superconductor having an S-shaped current-voltage characteristic is used as the current limiter. (C) 1998 American Institute of Physics. [S1063-7842(98)02410-6].
WOS
,
Scopus
,
Читать в сети ИФ
Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Physicotech Sci Res Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Physicotechnical Scientific-Research Institute, Krasnoyarsk State University, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Kirko, V. I.
}
Найти похожие
полный формат
краткий формат
все найденные
отмеченные
кроме отмеченных
Стандартный
Расширенный
Профессиональный
Распределенный
По словарю
ГРНТИ-навигатор
УДК-навигатор
Тематический навигатор
Другие библиотеки
Центральная Научная Библиотека КНЦ СО РАН
Библиотека института биофизики
Библиотека института химии и химический технологии
Библиотека института вычислительного моделирования
Библиотека института леса
Библиотека СФУ
Краевая научная библиотека
© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)