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    Kresin, Vladimir.
    Superconducting state. Mechanisms and materials / V. Z. Kresin, S. G. Ovchinnikov, S. A. Wolf. - [S. l.] : Oxford University Press, 2021. - XVI, 495 p. - (International series of monographs on physics ; 170) (Oxford science publication). - Bibliogr. - Index. - ISBN 978-0-19-884533-1 : Б. ц.
Перевод заглавия: Сверхпроводимость: механизм и материалы
   Перевод заглавия: Сверхпроводимость: механизм и материалы
Аннотация: This book provides the reader with a detailed theoretical treatment of the key mechanisms of superconductivity, up to the current state of the art (phonons, magnons, plasmons). In addition, the book describes the properties of key superconducting compounds that are of most interest for science and its applications today. For many years there has been a search for new materials with higher values of the main parameters, such as the critical temperature and the critical current. At present, the possibility to observe superconductivity at room temperature has become perfectly realistic. The book is especially concerned with high Tc systems, such as the high Tc oxides, hydrides with record values of the critical temperature under high pressure, nanoclusters, etc. A number of interesting novel superconducting systems have been discovered recently. Among them: topological materials, interface systems, intercalated graphene. The book contains rigorous derivations, based on statistical mechanics and many-body theory. The book is also providing qualitative explanations of the main concepts and results, which makes it accessible and interesting for a broader readership.

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Держатели документа:
ЦНБ ФИЦ Красноярского научного центра СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Wolf, Stuart
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    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].

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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.
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    Quantum phase transitions and superconductivity in single- and two-layer cuprates in the multiband theory of Hubbard fermions / S. G. Ovchinnikov [et al.] // J. Supercond. Nov. Magn. - 2013. - Vol. 26, Is. 8. - P. 2607-2609, DOI 10.1007/s10948-013-2144-1 . - ISSN 1557-1939. - ISSN 1557-1947
   Перевод заглавия: Квантовые фазовые переходы и сверхпроводимость в однослойных и двухслойных купратах в рамках многозонной теории фермионов Хаббарда
Аннотация: We consider the doping dependence of the normal and superconducting properties of La2Sr2−x CuO2 and YBa2Cu3O7 in the low energy effective model based on the ab initio LDA+GTB calculations. With doping we have found a concentration region with electronic instability of the uniform state. We have shown that two quantum phase transitions (QPT) of the Lifshitz type correspond well to the experimental phase diagram. For superconducting state we have considered both magnetic and phonon mechanisms of pairing.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Korshunov, M. M.; Коршунов, Максим Михайлович; Makarov, I. A.; Макаров, Илья Анатольевич; Shneyder, E. I.; Шнейдер, Елена Игоревна
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    Superconductivity in repulsive fermi-systems at low density / M. Y. Kagan [et al.] // J. Supercond. Nov. Magn. - 2013. - Vol. 26, Is. 9. - P. 2809-2815, DOI 10.1007/s10948-013-2262-9. - Cited References: 57. - The authors acknowledge helpful discussions with A. V. Chubukov, A. S. Alexandrov, V. V. Kabanov, K. I. Kugel, Yu. V. Kopaev, N.M. Plakida, N.V. Prokof'ev, M. M. Korovushkin, M. A. Mitskan. M. Yu. K. work was supported by RFBR grant No. 11-02-00741. . - ISSN 1557-1939
   Перевод заглавия: Сверхпроводимость в Ферми-системах с отталкиванием при малых концентрациях

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
T-J MODEL
   SUPERFLUID TRANSITION-TEMPERATURE
   FRACTIONAL-STATISTICS
   PHASE-SEPARATION
   HUBBARD-MODEL
   GAS
   ENHANCEMENT
   MECHANISM
   EXCHANGE
   PARTICLES
Кл.слова (ненормированные):
Anomalous superconductivity -- p-wave and d-wave pairings -- Kohn-Luttinger mechanism -- Shubin-Vonsovsky -- Hubbard and t-J models
Аннотация: In the large variety of models such as 3D and 2D Fermi-gas model with hard-core repulsion, 3D and 2D Hubbard model, and the Shubin-Vonsovsky model, we demonstrate the possibility of triplet p-wave pairing at low electron density. We show that the critical temperature of the p-wave pairing can be strongly increased in a spin-polarized case or in a two-band situation already at low density and reach experimentally feasible values of (1-5) K. We also discuss briefly d-wave pairing and high-T-C superconductivity with T-C similar to 100 K, which arises in the 2D t-J model in the range of parameters realistic for cuprates.

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Держатели документа:
PL Kapitsa Phys Problems Inst, Moscow 119334, Russia
Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany
Hofstra Univ, Dept Phys & Astron, Hempstead, NY 11549 USA
Kirenskii Inst Phys, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Kagan, M. Y.; Efremov, D. V.; Mar'enko, M. S.; Val'kov, V. V.; Вальков, Валерий Владимирович; RFBR [11-02-00741]
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    Superconductivity on interfaces of nonsuperconducting granules La2CuO4 and La1.56Sr0.44CuO4 / A. A. Bykov [et al.] // J. Supercond. Nov. Magn. - 2018. - Vol. 31, Is. 12. - P. 3867–3874, DOI 10.1007/s10948-018-4668-x. - Cited References: 19. - The authors are grateful to D.A. Balaev for fruitful discussions, and I.V. Nemtsev for electronic microscope measurements in the center for shared use, KSC SB RAS. The work is supported by the Russian Science Foundation (project No. 17-72-10067). . - ISSN 1557-1939
   Перевод заглавия: Сверхпроводимость на интерфейсах несверхпроводящих гранул La2CuO4 и La1.56Sr0.44CuO4
Кл.слова (ненормированные):
Magnetic properties -- Superconductivity -- Oxide superconductors -- Grain boundaries -- LCO -- LSCO -- Josephson media
Аннотация: Composite materials fabricated by annealing of nonsuperconducting ceramics La2CuO4 and La1.56Sr0.44CuO4 at 910 °C during various time are investigated. Areas of superconducting La1.85Sr0.15CuO4 phase arises at boundaries of contacting nonsuperconducting granules. The volume fraction of the superconducting phase increases with increasing annealing time. A model describing the magnetic and transport properties of the samples at low magnetic fields is constructed. The magnetotransport characteristics of obtained samples at low magnetic fields (∼ 100 Oe) are defined by weak links network formed by superconducting areas. At high fields, behavior of the system is defined by a magnetization of the disconnected superconducting islands. The average size of the superconducting areas has been estimated from an extended critical state model.

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Держатели документа:
Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre “Kurchatov Institute”, Gatchina, 1, mkr., Orlova roshcha, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Bykov, A. A.; Terent'ev, K. Yu.; Терентьев, Константин Юрьевич; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Savitskaya, N. E.; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
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    Superconductivity, magnetic interactions, and disorder in iron-based materials / M. M. Korshunov, V. A. Shestakov, L. V. Begunovich, Yu. N. Togushova // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. I : Magnetism and superconductivity. - Ст. I.I5. - P. 134. - Cited References: 15 . - ISBN 978-5-94469-051-7
   Перевод заглавия: Сверхпроводимость, магнитные взаимодействия и беспорядок в соединениях железа

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Shestakov, V. A.; Шестаков, Вадим Андреевич; Begunovich, L. V.; Togushova, Yu. N.; Тогушова Ю. Н.; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
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    The Kohn-Luttinger superconductivity in idealized doped graphene / M. Y. Kagan [et al.] // Solid State Commun. - 2014. - Vol. 188. - P. 61-66, DOI 10.1016/j.ssc.2014.03.001. - Cited References: 31. - This work was supported by the Program of the Division of Physical Sciences of the Russian Academy of Sciences (Project 11.3.1), and the Russian Foundation for Basic Research (Projects 14-02-00058 and 14-02-31237). One of the authors (M.M.K.) acknowledges the support of the Council of the President of the Russian Federation (Project MK-526.2013.2), and the Dynasty Foundation. . - ISSN 0038-1098. - ISSN 1879-2766
   Перевод заглавия: Сверхпроводимость Кона-Латтинжера в идиализированном допированном графене

РУБ Physics, Condensed Matter
Рубрики:
REPULSIVE INTERACTIONS
   HUBBARD-MODEL
   SUPERFLUIDITY
   INSTABILITY
   MECHANISM
   DENSITY
   SYSTEMS
Кл.слова (ненормированные):
Graphene -- Superconductivity
Аннотация: Idealized graphene monolayer is considered neglecting the van der Waals potential of the substrate and the role of the nonmagnetic impurities. The effect of the long-range Coulomb repulsion in an ensemble of Dirac fermions on the formation of the superconducting pairing in a monolayer is studied in the framework of the Kohn-Luttinger mechanism. The electronic structure of graphene is described in the strong coupling Wannier representation on the hexagonal lattice. We use the Shubin-Vonsowsky model which takes into account the intra- and intersite Coulomb repulsions of electrons. The Cooper instability is established by solving the Bethe-Salpeter integral equation, in which the role of the effective interaction is played by the renormalized scattering amplitude. The renormalized amplitude contains the Kohn-Luttinger polarization contributions up to and including the second-order terms in the Coulomb repulsion. We construct the superconductive phase diagram for the idealized graphene monolayer and show that the Kohn-Luttinger renormalizations and the intersite Coulomb repulsion significantly affect the interplay between the superconducting phases with f-, d+id-, and p+ip-wave symmetries of the order parameter. (C) 2014 Elsevier Ltd. All rights reserved.

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Держатели документа:
PL Kapitsa Phys Problems Inst, Moscow 119334, Russia
Natl Res Univ, Higher Sch Econ, Moscow Inst Elect & Math, Moscow 109028, Russia
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Kagan, M. Y.; Val'kov, V. V.; Вальков, Валерий Владимирович; Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; Program of the Division of Physical Sciences of the Russian Academy of Sciences [11.3.1]; Russian Foundation for Basic Research [14-02-00058, 14-02-31237]; Council of the President of the Russian Federation [MK-526.2013.2]; Dynasty Foundation
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    The Kohn-Luttinger superconductivity in idealized doped graphene / M. Y. Kagan [et al.] // The Eur. conf. "Physics of magnetism 2014" (PM’14) : Abstracts. - Poznań, 2014. - Ст. P-1-09. - This work was supported by the RFBR (projects 14-02-00058 and 14-02-31237) and the Grant of President of Russia (project MK-526.2013.2) . - ISBN 83-922407-9-0
   Перевод заглавия: Сверхпроводимость Кона-Латтинжера в идиализированном допированном графене
Кл.слова (ненормированные):
Graphene -- Superconductivity
Аннотация: The effect of the long-range Coulomb repulsion in an ensemble of Dirac fermions on the formation of the superconducting pairing in an idealized graphene monolayer is studied in the framework of the Kohn-Luttinger mechanism neglecting the van der Waals potential of a substrate and the role of the nonmagnetic impurities. The superconductive phase diagram of the system is constructed and it is shown that the Kohn-Luttinger renormalizations up to and including the second-order terms in the Coulomb interaction and the intersite Coulomb repulsion significantly affect the inter- play between the superconducting phases with f-, d+id-, and p+ip-wave symmetriesof the order parameter.

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Доп.точки доступа:
Kagan, M. Y.; Val'kov, V. V.; Вальков, Валерий Владимирович; Mitskan, V. A.; Мицкан, Виталий Александрович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; "Physics of magnetism", European conference(2014 ; Jun. 23-27 ; Poznań, Poland)
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    Togushova, Yu. N.
    Magnetic Interactions, Superconductivity, and Spin-Resonance Peak in Iron-Based Materials / Yu. N. Togushova, M. M. Korshunov // Phys. Metals Metallogr. - 2019. - Vol. 120, Is. 13. - P. 1313-1317, DOI 10.1134/S0031918X1913026X. - Cited References: 35. - This work was supported in part by Presidium of RAS Program for the Fundamental Studies no. 12 and “BASIS” Foundation for Development of Theoretical Physics and Mathematics. . - ISSN 0031-918X. - ISSN 1555-6190
   Перевод заглавия: Магнитные взаимодействия, сверхпроводимость и спин-резонансный пик в материалах на основе железа
Кл.слова (ненормированные):
Fe-based superconductors -- spin resonance peak -- spin fluctuation mechanism of pairing
Аннотация: Different mechanisms of superconductivity result in specific symmetries and structures of the gap in multiband systems. Here we review the spin fluctuation mechanism of Cooper pairing and discuss the spin resonance feature in the superconducting state of iron-based materials.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041 Russia
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036 Russia

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович
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10.

    Unexpected impact of magnetic disorder on multiband superconductivity / M. M. Korshunov [et al.] // Phys. Rev. B. - 2014. - Vol. 90, Is. 13, DOI 10.1103/PhysRevB.90.134517. - Cited References: 41. - The authors are grateful to S.-L. Drechsler, P.J. Hirschfeld, K. Kikoin, and S.G. Ovchinnikov for useful discussions. We acknowledge partial support by the Dynasty Foundation and ICFPM (MMK), the Ministry of Education and Science of the Russian Federation (Grant No. 14Y26.31.0007), RFBR (Grant Nos. 12-02-31534 and 13-02-01395), President Grant for Government Support of the Leading Scientific Schools of the Russian Federation (NSh-2886.2014.2), DFG Priority Program 1458, and FP7 EU-Japan program IRON SEA. . - ISSN 1098-0121. - ISSN 1550-235X
   Перевод заглавия: Непредвиденное влияние магнитного беспорядка на многозонную сверхпроводимость

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTIVITY
   PARAMAGNETIC IMPURITIES
   IRON
   CONDUCTIVITY
   ALLOYS
Аннотация: We analyze how the magnetic disorder affects the properties of the two-band s± and s++ models, which are the subject of discussions regarding iron-based superconductors and other multiband systems like MgB2. We show that there are several cases when the transition temperature Tc is not fully suppressed by magnetic impurities in contrast to the Abrikosov-Gor'kov theory, but a saturation of Tc takes place in the regime of strong disorder. These cases are: (1) the purely interband impurity scattering and (2) the unitary scattering limit. We show that in the former case the s± gap is preserved, while the s++ state transforms into the s± state with increasing magnetic disorder. For case (2), the gap structure remains intact.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Leibniz Inst Festkorper & Werkstoffforsch, D-01069 Dresden, Germany
Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands
Moscow Inst Phys & Technol, Dolgoprudnyi, Russia
Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
Lebedev Phys Inst RAN, Moscow, Russia

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Efremov, D. V.; Golubov, A. A.; Dolgov, O. V.; Dynasty Foundation; ICFPM; Ministry of Education and Science of the Russian Federation [14Y26.31.0007]; RFBR [12-02-31534, 13-02-01395]; Leading Scientific Schools of the Russian Federation [NSh-2886.2014.2]; DFG [1458]; EU-Japan
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