Библиотека института физики им. Л.В. Киренского СО РАН

Главная

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

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (1)

Каталог журналов библиотеки ИФ СО РАН (1)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=Copper<.>)

Общее количество найденных документов : 197
Показаны документы с 1 по 20

Peculiarities of the resistive state of the (Y,Lu)1Ba2Cu3O7-δ superconducting ceramics / K. S. Aleksandrov [et al.] // Physica C. - 1988. - Vol. 156, Is. 2. - P. 249-250 . - ISSN 0921-4534
Кл.слова (ненормированные):
Ceramic Materials -- Oxides -- Current Voltage Characteristics -- Yttrium Barium Copper Oxides -- Superconducting Materials
Аннотация: The resistive state of the high-Tc superconducting ceramics (Y, Lu)1Ba2Cu3O7-δ has been investigated, a hysteresis instability has been discovered in the current-voltage characteristics (CVC) under a current density j ≈ 1.7 kA cm-2. © 1988.

Scopus,
WOS

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Vasilyev, A. D.; Васильев, Александр Дмитриевич; Zwegintsev, S. A.; Звегинцев, Сергей Анатольевич; Петров, Михаил Иванович; Petrov, M. I.; Khrustalev, B. P.; Хрусталев, Борис Петрович
}
Найти похожие

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

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

OVCHINNIKOV, S. G.
EFFECT OF ORTHORHOMBIC ILISTORTIONS ON THE X-RAY AND X-RAY ELECTRON-SPECTRA OF COPPER OXIDES / S. G. OVCHINNIKOV // Fiz. Tverd. Tela. - 1993. - Vol. 35, Is. 3. - P. 617-623. - Cited References: 9 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TC
HOLES

WOS
}
Найти похожие

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

WOS
}
Найти похожие

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.

WOS,
Scopus
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
}
Найти похожие

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

WOS
}
Найти похожие

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

Mossbauer study of copper ferrite / O. A. Bayukov [и др.] // Fiz. Tverd. Tela. - 1995. - Vol. 37, Is. 8. - P. 2409-2412. - Cited References: 9 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
CU-ZN FERRITE

WOS

Доп.точки доступа:
Bayukov, O. A.; Баюков, Олег Артемьевич; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Savitskii, A. F.
}
Найти похожие

10.

Ovchinnikov, S. G.
Modification of magnetic and superconducting properties of layered cuprates due to copper substitution for zinc and nickel / S. G. Ovchinnikov // Fiz. Tverd. Tela. - 1995. - Vol. 37, Is. 12. - P. 3645-3654. - Cited References: 28 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC-STRUCTURE
   LA2CUO4
   LA2-XSRXCUO4
   EXCITATIONS
   DENSITY
   PLANE
   NI

WOS
}
Найти похожие

11.

Avramov, P. V.
Effects of the intense electron correlations on the shape of x-ray CuK absorption spectra of La2-xSrxCuO4 / P. V. Avramov, S. G. Ovchinnikov // Zhurnal Eksperimentalnoi Teor. Fiz. - 1995. - Vol. 108, Is. 4. - P. 1479-1488. - Cited References: 28 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
HIGH-TC SUPERCONDUCTIVITY
   EDGE STRUCTURE
   LA2CUO4
   SATELLITES
   ALPHA
   EXCITATIONS
   COPPER
   OXIDES
   STATE
   SHAKE

WOS

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Аврамов, Павел Вениаминович
}
Найти похожие

12.

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

13.

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

14.

Permalloy-copper-permalloy sandwiches with perpendicular anisotropy axes in the magnetic layers / V. P. Kononov [et al.] // Tech. Phys. - 1997. - Vol. 42, Is. 11. - P. 1281-1284, DOI 10.1134/1.1258907. - Cited References: 9 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
CO/CU/CO SANDWICHES
Аннотация: Layerd FeNi-Cu-FeNi structures with a mutually perpendicular orientation of the easy axes in the FeNi layers are fabricated in ultrahigh vacuum, and the physical properties of these structures are investigated: ferromagnetic resonance, quasistatic magnetization reversal, and the Faraday rotation of the plane of polarization of a light wave. (C) 1997 American Institute of Physics. [S1063-7842(97)00811-8].

WOS,
Scopus
Держатели документа:
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Kononov, V. P.; Khudyakov, A. E.; Morozova, T. P.; Chernov, V. K.; Piskunov, O. N.; Zhigalov, V. S.; Жигалов, Виктор Степанович; Bondarenko, G. V.; Бондаренко, Геннадий Васильевич; Edel'man, I. S.; Edelman, I. S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
Найти похожие

15.

    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

16.

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

17.

Ovchinnikov, S. G.
Role of zinc and nickel impurities in high-temperature superconductors / S. G. Ovchinnikov // Phys. Solid State. - 1999. - Vol. 41, Is. 4. - P. 534-538, DOI 10.1134/1.1130819. - Cited References: 32 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
PR2-XCEXCUO4+DELTA SINGLE-CRYSTALS
   SR-CU-O
   COPPER OXIDES
   MAGNETIC-PROPERTIES
   NI
   MODEL
   ZN
   SUBSTITUTION
   SCATTERING
   SPECTRUM
Аннотация: The local changes produced in the electronic structure and their effect on the physical properties of the superconducting and normal phases when zinc and nickel are substituted for copper are examined on the basis of a multiband p-d model. It is shown that strong electronic correlations suppress the S = 1 configuration of Ni2+ and cause the superposition of the S = 1/2 and S = 0 states of nickel. The change in the density of states in p- and n-type systems is studied, and the peculiarity of Zn impurity for p- type systems and Ni impurity for n-type systems is shown. The universal dependence of the T-c on the residual resistance in lightly doped superconductors and deviations from it in optimally doped systems are discussed. (C) 1999 American Institute of Physics. [S1063-7834(99)00704-2].

WOS,
Scopus,
Читать в сети ИФ

Публикация на русском языке Овчинников, Сергей Геннадьевич. Роль примесей цинка и никеля в высокотемпературных сверхпроводниках [Текст] / С. Г. Овчинников // Физ. тверд. тела. - 1999. - Т. 41 Вып. 4. - С. 596-600

Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
Найти похожие

18.

Weak ferromagnetism in copper metaborate CuB2O4 / G. A. Petrakovskii [et al.] // Phys. Solid State. - 1999. - Vol. 41, Is. 7. - P. 1157-1161, DOI 10.1134/1.1130957. - Cited References: 10 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SUSCEPTIBILITY
Аннотация: CuB2O4 single crystals have been grown and their magnetic and resonance properties have been investigated for the first time. The temperature dependence of the susceptibility was found to contain features at T = 21 and 10 K. The CuB2O4 single crystal transformed at T = 21 K to a weakly ferromagnetic state. The sharp drop in susceptibility at T 10 K is caused by a transition of the magnetic system of CuB2O4 to an antiferromagnetic state. The effective magnetic moment of the Cu2+ ion, determined from the high-temperature part of the magnetic susceptibility, is 1.77 mu(B). The room-temperature g factors are, respectively, 2.170 and 2.133 for magnetic field parallel and perpendicular to the c axis of the crystal. The antiferromagnetic resonance parameters in the weakly ferromagnetic and antiferromagnetic phases were measured. (C) 1999 American Institute of Physics. [S1063-7834(99)02907-X].

WOS,
Scopus,
Читать в сети ИФ

Публикация на русском языке Слабый ферромагнетизм в метаборате меди CuB2O4 [Текст] / Г. А. Петраковский, К. А. Саблина, Д. А. Великанов [и др.] // Физ. тверд. тела. - 1999. - Т. 41 Вып. 7. - С. 1267-1271

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

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vorotynov, A. M.; Воротынов, Александр Михайлович; Volkov, N. V.; Волков, Никита Валентинович; Bovina, A. F.; Бовина, Ася Федоровна
}
Найти похожие

19.

    Kuz'min, E. V.
    Superconductivity of strongly correlated electrons in copper and ruthenium oxides within the t-J-I model / E. V. Kuz'min, S. G. Ovchinnikov, I. O. Baklanov // J. Exp. Theor. Phys. - 1999. - Vol. 89, Is. 2. - P. 349-357, DOI 10.1134/1.558991. - Cited References: 12 . - ISSN 1063-7761
   Перевод заглавия: Сверхпроводимость сильно коррелированных электронов оксидов меди и рутения в рамках t-J-I модели

РУБ Physics, Multidisciplinary
Рубрики:
LAYERED PEROVSKITE
SR2RUO4
Аннотация: We propose a t-J-I model with direct ferromagnetic exchange I to explain the superconductivity of copper oxides and the ruthenate Sr2RuO4 on the basis of the analysis of the electronic structure of these substances. We analyze the possible p- and d-type superconducting solutions. Solutions of the s type with singlet pairings are impossible in the strong-electron-correlations regime, and p-type solutions correspond to triplet superconductivity and is formed near the ferromagnetic instability threshold in ruthenates. The solution with the d(x)(2)-y(2) symmetry near the antiferromagnetic instability threshold corresponds to copper oxides. We also discuss the reason for the high values of the superconducting transition temperature (T(c)similar to 100 K) in copper oxides and the low values (T(c)similar to 1 K) in ruthenates. (C) 1999 American Institute of Physics. [S1063- 7761(99)02208-8].

WOS,
Scopus,
Shpringer,
Читать в сети ИФ

Публикация на русском языке Сверхпроводимость сильно коррелированных электронов оксидов меди и рутения в рамках t-J-I модели [Текст] / Е. В. Кузьмин, О. Г. Бакланов, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 1999. - Т. 116 Вып. 2.- С.655-670

Держатели документа:
Krasnoyarsk State Univ, Krasnoyarsk 660075, Russia
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660075, Russia
ИФ СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Baklanov, I. O.
}
Найти похожие

20.

Evolution of the band structure of quasiparticles with doping in copper oxides on the basis of a generalized tight-binding method / V. A. Gavrichkov [et al.] // J. Exp. Theor. Phys. - 2000. - Vol. 91, Is. 2. - P. 369-383, DOI 10.1134/1.1311997. - Cited References: 45 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
T-J MODEL
   CUPRATE SUPERCONDUCTORS
   ELECTRONIC-STRUCTURE
   EXCITATIONS
   DEPENDENCE
   TEMPERATURE
   DERIVATION
   SR2CUO2CL2
   SPECTRUM
   DENSITY
Аннотация: Two methods for stabilizing the two-hole B-3(1g) state as the ground state instead of the Zhang-Rice singlet are determined on the basis of an orthogonal cellular basis for a realistic multiband pd model of a CuO2 layer and the dispersion relations for the valence band top in undoped and doped cases are calculated. In the undoped case, aside from the valence band, qualitatively corresponding to the experimental ARPES data for Sr2CuO2Cl2 and the results obtained on the basis of the t-t'-J model, the calculations give a zero-dispersion virtual level at the valence band top itself. Because of the zero amplitude of transitions forming the virtual level the response corresponding to it is absent in the spectral density function. In consequence, the experimental ARPES data do not reproduce its presence in this antiferromagnetic undoped dielectric. A calculation of the doped case showed that the virtual level transforms into an impurity-type band and acquires dispersion on account of the nonzero occupation number of the two-hole states and therefore should be detected in ARPES experiments as a high-energy peak in the spectral density. The computed dispersion dependence for the valence band top is identical to the dispersion obtained by the Monte Carlo method, and the ARPES data for optimally doped Bi2Sr2CaCu2O8 + delta samples. The data obtained also make it possible to explain the presence of an energy pseudogap at the symmetric X point of the Brillouin band of HTSC compounds. (C) 2000 MAIK "Nauka/Interperiodica".

WOS,
Scopus,
Читать в сети ИФ

Публикация на русском языке Эволюция зонной структуры квазичастиц с допированием в оксидах меди в рамках обобщенного метода сильной связи [Текст] / В. А. Гавричков [и др.] // Журн. эксперим. и теор. физ. - 2000. - Т. 118 Вып. 2. - С. 422-437

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

Доп.точки доступа:
Gavrichkov, V. A.; Гавричков, Владимир Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Borisov, A. A.; Goryachev, E. G.
}
Найти похожие