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    Коршунов, Максим Михайлович.
    Взаимосвязь сверхпроводимости и магнитных возбуждений в многоорбитальных системах / М. М. Коршунов, Ю. Н. Тогушова // Вестн. Новосиб. гос. ун-та. Сер.: Физика. - 2015. - Т. 10, Вып. 2. - С. 83-90. - Библиогр.: 29 назв. - Материал данной работы был доложен на семинаре ОКНО-2014. Работа была выполнена при поддержке Минобрнауки РФ ГФ-2 (СФУ), РФФИ (грант 13-02-01395), программы Президиума РАН № 20.7, при государственной поддержке ведущих научных школ НШ-2886.2014.2, фонда «Династия» и МЦФФМ . - ISSN 1818-7994
   Перевод заглавия: Interplay of superconductivity and magnetic excitations in multiorbital systems
Кл.слова (ненормированные):
сверхпроводники на основе железа -- спин-резонансный пик -- спиновая восприимчивость -- Fe-based superconductors -- spin-resonance peak -- spin susceptibility
Аннотация: Рассмотрено влияние нетривиального сверхпроводящего параметра порядка на магнитную восприимчивость в многоорбитальной модели соединений железа. Показано, как формируется спин-резонансный пик, обсуждается его связь с экспериментальными данными по неупругому рассеянию нейтронов.
We have considered the impact of the nontrivial superconducting order parameter on the magnetic susceptibility within the multiorbital model for the iron-based materials. The formation of the spin-resonance peak is demonstrated and its connection to the experimental data on the inelastic neutron scattering is discussed.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Тогушова, Ю. Н.; Togushova, Yu. N.; Korshunov, M. M.
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Why in cuprate superconductors the d-wave superconductivity emerges rather than s-wave / В. Г. Мягков [и др.] // 19-й Междунар. симп. "Порядок, беспорядок и свойства оксидов" (ODPO-19) : труды симпозиума. - 2016. - Вып. 19, Т. 1. - P48-49

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Мягков, Виктор Григорьевич; Myagkov, V. G.; Быкова, Людмила Евгеньевна; Bykova, L. E.; Жигалов, Виктор Степанович; Zhigalov, V. S.; Середкин, Виталий Александрович; Seredkin, V. A.; Турпанов, Игорь Александрович; Turpanov, I.A.; Юшков, Василий Иванович; Yushkov, V. I.; Патрин, Геннадий Семёнович; Patrin, G. S.; Тамбасов, Игорь Анатольевич; Tambasov, I. A.; Мацынин, Алексей Александрович; Matsynin, A. A.; Рыбакова, Александра Николаевна; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Бондаренко, Галина Николаевна; Bondarenko, G. N.; Южный федеральный университет; "Порядок, беспорядок и свойства оксидов", международный междисциплинарный симпозиум(19 ; 2016 ; 5-10 сент. ; Ростов-на-Дону / Южный, Ростовская обл.); "Order, Disorder and Properties of Oxides", International interdisciplinary seminar(19 ; 2016 г. ; sent. ; 5-10 ; Rostov-on-Don / Yuzhny)
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Vortex pinning and magnetic peak effect in Eu(Eu,Ba)2.125Cu3Ox / E. Altin [et al.] // J. Mater. Sci.-Mater. Electron. - 2014. - Vol. 25, Is. 3. - P. 1466-1473, DOI 10.1007/s10854-014-1753-1. - Cited References: 30 . - ISSN 0957-4522. - ISSN 1573-482X

РУБ Engineering, Electrical & Electronic + Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
SUPERCONDUCTORS
   FIELD
   NANOCRYSTALLINE
   TEMPERATURE
   LOOP
Аннотация: Eu–Ba–Cu–O composition was synthesized by solid state reaction technique. To determine optimum growth temperature, heat treatment was examined on the material at 880–1,100 °C. Microstructural evolution, phase formation and elemental distribution depending on heat treatments were examined by using X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscope analysis. Optimum fabrication conditions were determined as 1,020 °C for 24 h under oxygen atmosphere and detailed characterization of corresponding compound was performed. The magnetization hysteresis loops are expounded to be the product of superconducting Eu-123 grains and magnetic Eu2+ ions. The peak effect on the magnetization curves was described by the extended critical state model. Scaling of the pinning force was found such that the peak position is proportional to the irreversibility field H irr and the maximum pinning force is proportional to H irr 2 .

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Держатели документа:
Inonu Univ, Bilimsel & Teknolojik Arastirma Merkezi, TR-44280 Malatya, Turkey
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Inonu Univ, Fen Edebiyat Fak, Fizik Bolumu, Superiletkenlik Arastirma Grubu, TR-44280 Malatya, Turkey

Доп.точки доступа:
Altin, E.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Demirel, S.; Oz, E.; Kurt, F.; Altin, S.; Yakinci, M.E.
}
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Semenov, S. V.
Universal behavior and temperature evolution of the magnetoresistance hysteresis in granular high-temperature superconductors Y-Ba-Cu-O / S. V. Semenov, D. A. Balaev, M. I. Petrov // Phys. Solid State. - 2021. - Vol. 63, Is. 7. - P. 1069-1080, DOI 10.1134/S1063783421070192. - Cited References: 80. - The authors are grateful to D.M. Gokhfeld for discussion of the results. The measurements of the transport properties were performed in part on a PPMS-6000 system of the Center for Collective Use, Krasnoyarsk Scientific Center, Siberian Branch of the Russian Academy of Sciences . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
CRITICAL-CURRENT-DENSITY
CURRENT-VOLTAGE CHARACTERISTICS
MAGNETIC-FLUX COMPRESSION
Кл.слова (ненормированные):
granular HTS -- magnetoresistance hysteresis -- grain boundaries
Аннотация: Regularities in the behavior of the magnetoresistance hysteresis R(H) in the granular yttrium high-temperature superconductors (HTSs) have been established. For this purpose, a comparative analysis of the magnetotransport properties has been carried out on the granular HTS samples, which exhibit (i) approximately the same magnetic properties and temperatures of the onset of the superconducting transition (90.5–93.5 K, which is characteristic of HTS grains) and (ii) different critical transport currents JC (which is characteristic of grain boundaries). Despite a significant (by more than an order of magnitude) spread of the JC values for the three samples, a universal behavior of the magnetoresistance hysteresis has been found, which is apparently inherent in all the granular Y–Ba–Cu–O compounds. The R(H) hysteresis is extremely broad and, in a fairly wide external field range, the dependence of the magnetoresistance hysteresis width ΔН on the field Hdec (the external field for the decreasing hysteresis branch is Н = Hdec) is almost linear: ΔH ≈ Hdec. This behavior is observed over the entire temperature range of implementation of the superconducting state (the investigations have been carried out at temperatures of 77–88 and 4.2 K). The result obtained has been explained by considering the effective field in grain boundaries, which is a superposition of the external field and the field induced by the magnetic moments of grains. The field induced by grains, in turn, significantly increases in the region of grain boundaries due to the magnetic flux compression (the grain boundary length is shorter than the HTS grain size by several orders of magnitude). The aforesaid has been confirmed by the analysis of the R(H) hysteresis for the Y–Ba–Cu–O- and CuO-based HTS composite, in which the grain boundary length is purposefully increased; as a result, the flux compression is less pronounced and the R(H) hysteresis narrows.

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Публикация на русском языке Семенов, Сергей Васильевич. Универсальность поведения гистерезиса магнитосопротивления и его температурной эволюции для гранулярных высокотемпературных сверхпроводников Y-Ba-Cu-O [Текст] / С. В. Семенов, Д. А. Балаев, М. И. Петров // Физ. тверд. тела. - 2021. - Т. 63 Вып. 7. - С. 854-865

Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Petrov, M. I.; Петров, Михаил Иванович; Семёнов, Сергей Васильевич
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    Korshunov, M. M.
    Uniform impurity scattering in two-band s ± and s ++ superconductors / M. M. Korshunov, Y. N. Togushova, O. V. Dolgov // J. Supercond. Nov. Magn. - 2016. - Vol. 29, Is. 4. - P1089-1095, DOI 10.1007/s10948-016-3385-6. - Cited References:28. - We are grateful to D.V. Efremov and A. A. Golubov for useful discussions. We acknowledge the partial support by RFBR (Grant 16-02-00098) and President Grant for Government Support of the Leading Scientific Schools of the Russian Federation (NSh-2886.2014.2). . - ISSN 1557-1939. - ISSN 1557-1947
   Перевод заглавия: Однородное примесное рассеяние в двухзонных s± и s++ сверхпроводниках

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
High-temperature superconductivity
Iron
Кл.слова (ненормированные):
Multiband superconductivity -- Impurity scattering -- Fe-based -- superconductors
Аннотация: The s ± and s ++ models for the superconducting state are subject of intense studies regarding Fe-based superconductors. Depending on the parameters, disorder may leave intact or suppress T c in these models. Here, we study the special case of disorder with equal values of intra- and interband impurity potentials in the two-band s ± and s ++ models. We show that this case can be considered as an isolated point and T c there has maximal damping for a wide range of parameters.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodny Prospect 79, Krasnoyarsk 660041, Russia.
Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
RAS, PN Lebedev Phys Inst, Moscow 117901, Russia.

Доп.точки доступа:
Togushova, Yu. N.; Dolgov, O. V.; Коршунов, Максим Михайлович; RFBR [16-02-00098]; Leading Scientific Schools of the Russian Federation [NSh-2886.2014.2]
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    Tuning the peak effect in the Y1−xNdxBa2Cu3O7−δ compound / D. M. Gokhfeld [et al.] // Ceram. Int. - 2017. - Vol. 43, Is. 13. - P. 9985-9991, DOI 10.1016/j.ceramint.2017.05.011. - Cited References: 37. - This work was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project no. 16-48-243018 and the Russian Foundation for Basic Research, project no. 16-38-00400. . - ISSN 0272-8842
   Перевод заглавия: Управление пик-эффектом в соединении Y1−xNdxBa2Cu3O7−δ
Кл.слова (ненормированные):
Peak effect -- Bulk superconductors -- Critical current -- Pinning -- Characterization -- YBCO
Аннотация: Polycrystalline Y1−xNdxBa2Cu3O7−δ (x=0.02, 0.11, and 0.25) superconductors are synthesized. Nd atoms are uniformly distributed over grains. The magnetization loops of the samples have a pronounced second peak in a wide temperature range. The magnetization data are analyzed using the extended critical state model. It is found that the order-disorder transition of the vortex lattice is affected by doping with neodymium and temperature; the second-peak field and width decrease monotonically with increasing x value. The undoped polycrystalline YBa2Cu3O7−δ compound is assumed to exhibit the peak effect in higher magnetic fields.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Balaev, D. A.; Балаев, Дмитрий Александрович; Yakimov, I. S.; Petrov, M. I.; Петров, Михаил Иванович; Semenov, S. V.; Семёнов, Сергей Васильевич
}
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Trapped field in superconductors with perforations / A. N. Maksimova, V. A. Kashurnikov, A. N. Moroz, D. M. Gokhfeld // J. Supercond. Nov. Magn. - 2022. - Vol. 35, Is. 1. - P. 283-290, DOI 10.1007/s10948-021-06067-7. - Cited References: 35. - The reported study was funded by RFBR and ROSATOM according to the research project No 20-21-00085 (V.A. Kashurnikov, A.N. Moroz) . - ISSN 1557-1939. - ISSN 1557-1947

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
MAGNETIZATION
BULK
Кл.слова (ненормированные):
Trapped flux -- Vortex pinning -- Monte Carlo -- Trapped field magnet -- HTS foam
Аннотация: The Monte Carlo method has been used to calculate the trapped magnetic field in superconducting plates with holes. The mechanism of flux pinning on the holes is implemented with special subprocesses added to the algorithm: vortex capture and emission, both occurring on the hole boundaries. Secondary peaks related to the holes emerge on the calculated profiles of the trapped magnetic field. It has been found that these peaks disappear in plates with sufficiently strong pinning or when the computational mesh is coarse (the case corresponding to a low resolution of probes in experiments). The dependence of the trapped field on the hole radius has been analyzed.

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Держатели документа:
Natl Res Nucl Univ MEPhI, Moscow 115409, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Maksimova, A. N.; Kashurnikov, V. A.; Moroz, A. N.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; RFBRRussian Foundation for Basic Research (RFBR) [20-21-00085]; ROSATOM [20-21-00085]
}
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Trapped field in perforated superconductors / D. M. Gokhfeld, A. N. Maksimova, V. A. Kashurnikov, A. N. Moroz // 12th International workshop on processing and applications of superconducting bulk materials (PASREG 2021) : program and abstracts. - 2021. - Ст. F-III-1

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Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Maksimova, A. N.; Kashurnikov, V. A.; Moroz, A. N.; International Workshop on Processing and Applications of Superconducting Bulk Materials(12 ; 2021 ; Nov. 11-13 ; Shanghai, China)
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Transport properties of HTSC-based composites: Modeling the random networks of Josephson weak links with magneto-active barriers. / K. A. Shaihutdinov [et al.] // J. Low Temp. Phys. - 2003. - Vol. 130, Is. 3-4. - P. 347-381, DOI 10.1023/A:1022204705059. - Cited References: 89 . - ISSN 0022-2291

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
   HIGH-TEMPERATURE SUPERCONDUCTORS
   SNS JUNCTIONS
   THERMAL FLUCTUATIONS
   RESISTIVE PROPERTIES
   PERCOLATION SYSTEM
   TRANSITION
   YBA2CU3O7
   BOUNDARY
   OXIDES
Кл.слова (ненормированные):
Crystalline materials -- Electric insulators -- Josephson junction devices -- Magnetic devices -- Magnetic barriers -- Superconducting materials -- composite
Аннотация: The results of the study of transport properties (temperature dependences of resistivity and critical current, current-voltage characteristics) of two-phase composites on the basis of Y3/4Lu1/4Ba2Cu3O7 high-temperature superconductor (HTSC) produced by fast baking technique and modelling networks of Josephson-type weak links are reported. Non-superconducting ingredients with different magnetic structures, insulators and normal metals, function as barriers between HTSC crystallites. Besides strong suppression of superconducting properties in HTSC composites with magnetic barriers, anomalous behavior of temperature dependences of resistivity below T-c of HTSC grains have been observed and investigated.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian St. Aerosp. Univ., Krasnoyarsk 660014, Russian Federation
Krasnoyarsk State University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Shaihutdinov, K. A.; Balaev, D. A.; Балаев, Дмитрий Александрович; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович; NATO Advanced Research Workshop on Vortex Dynamics in High-Temperature Superconductors(2002 ; May ; 17-22)
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10.

Transport properties of HTSC plus Ba(Pb, Met)O-3 composites as functions of the electrical and magnetic characteristics of nonsuperconducting components / M. I. Petrov [et al.] // Phys. Solid State. - 2000. - Vol. 42, Is. 5. - P. 810-815, DOI 10.1134/1.1131294. - Cited References: 27 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   CURRENT-VOLTAGE CHARACTERISTICS
   NORMAL-METAL LAYER
   WEAK LINKS
   JUNCTIONS
   SCATTERING
   BAPB1-XBIXO3
   TRANSITION
   IMPURITIES
   BREAKING
Аннотация: Composites simulating a network of weak metallic links and consisting of a classic 1-2-3 HTSC and a BaPbO3 metal oxide with incorporated Sn, Ni, and Fe impurities have been prepared. Experimental resistivity, magnetic, and Mossbauer studies of the BaPb(0.9)Met(0.1)O(3) nonsuperconducting components are presented. The transport properties of the HTSC + BaPb(0.9)Met(0.1)O(3) composites have been investigated. The superconducting properties of the composites are observed to be suppressed, both when the carrier mean free path in nonsuperconducting components with tin impurities decreases, and as a result of an additional interaction of the magnetic moments of (Fe, Ni) impurities with the spins of supercurrent carriers. The experimental temperature dependences of the composite critical current are analyzed in terms of the de Gennes theory for the superconductor-normal metal-superconductor structures. (C) 2000 MAIK "Nauka/Interperiodica".

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

Доп.точки доступа:
Petrov, M. I.; Петров, Михаил Иванович; Balaev, D. A.; Балаев, Дмитрий Александрович; Ospishchev, S. V.; Оспищев С. В.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
}
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11.

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.

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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
}
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12.

Time relaxation of residual resistance of HTSC-based composites / D. A. Balaev [et al.] // Physica C. - 2007. - Vol. 460: 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (JUL 09-14, 2006, Dresden, GERMANY). - P. 1309-1310, DOI 10.1016/j.physc.2007.03.347. - Cited References: 5 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
SUPERCONDUCTORS
Кл.слова (ненормированные):
granular HTSC -- resistance -- relaxation -- magnetic flux -- Granular HTSC -- Magnetic flux -- Relaxation -- Resistance -- Copper oxides -- Crystallites -- Magnetic flux -- Magnetic relaxation -- Magnetization -- Yttrium barium copper oxides -- Anderson-like relaxation processes -- Flux trapping -- Residual resistance -- Time relaxation -- Josephson junction devices
Аннотация: Magnetoresistance curves R(H) and time relaxation of the residual resistance of bulk YBCO + CuO composites have been studied. These composites represent the network of Josephson junctions, where CuO acts as a barrier between YBCO grains. It has been shown that hysteresis of the R(H) dependences is related to the flux trapping within the YBCO crystallites. This flux induces magnetic field in the intergrain media. Time relaxation of the residual resistance is caused by relaxation of the magnetization of YBCO grains. The time dependence of the residual resistance obeys a logarithmic law, which describes the Anderson-like relaxation processes in the YBCO grains. (c) 2007 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Petrov, M. I.; Петров, Михаил Иванович
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13.

    Korshunov, M. M.
    Three-orbital model for Fe-pnictides / M. M. Korshunov, Y. N. Togushova, I. Eremin // J. Supercond. Nov. Magn. - 2013. - Vol. 26, Is. 8. - P. 2665-2668, DOI 10.1007/s10948-013-2156-x . - ISSN 1557-1939
   Перевод заглавия: Трехорбитальная модель ферропниктидов
Кл.слова (ненормированные):
Fe-based superconductors -- Low-energy model -- Spin susceptibility -- Fe-based superconductors -- Iron-based superconductors -- Pairing interactions -- Spin susceptibility -- High temperature superconductors -- Magnetic susceptibility -- Superconductivity
Аннотация: We formulate and study the three-orbital model for iron-based superconductors. Results for the band structure, Fermi surface, and the spin susceptibility in both normal and superconducting s В± states are presented. We also discuss the pairing interaction and show that the dominant part of it should come from the intraorbital scattering. В© 2013 Springer Science+Business Media New York.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Ruhr Univ Bochum, Inst Theoret Phys 3, D-44801 Bochum, Germany
Kazan Fed Univ, Kazan 420008, Russia

Доп.точки доступа:
Togushova, Yu. N.; Eremin, I.; Коршунов, Максим Михайлович
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14.

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.

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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
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15.

Thermally activated dissipation in a novel foamed Bi-based oxide superconductor in magnetic fields / K. A. Shaykhutdinov [et al.] // Supercond. Sci. Technol. - 2007. - Vol. 20, Is. 6. - P. 491-494, DOI 10.1088/0953-2048/20/6/001. - Cited References: 20 . - ISSN 0953-2048

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
FLUX
   BI2SR2CACU2O8+DELTA
   MECHANISM
   PHASE
   FILMS
Кл.слова (ненормированные):
Bismuth compounds -- Josephson junction devices -- Magnetic field effects -- Transport properties -- Resistive transitions -- Thermally activated dissipation -- Oxide superconductors
Аннотация: The transport properties of a novel foamed superconductor Bi1.8Pb0.3Sr1.9Ca2Cu3Ox have been studied. As the analysis of resistive transitions in a magnetic field shows, the dissipation follows a thermally activated flux creep model with the temperature- independent pinning potential in S-N-S-type Josephson junctions.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Boreskov Inst Catalysis, Novosibirsk 630090, Russia
ИФ СО РАН
Kirensky Institute of Physics, Akademgorodok 50, 660036 Krasnoyarsk, Russian Federation
Boreskov Institute of Catalysis, Lavrent'ev avenue 5, 630090 Novosibirsk, Russian Federation

Доп.точки доступа:
Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Vasilyev, A. D.; Martyanov, O. N.; Petrov, M. I.; Петров, Михаил Иванович
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16.

Korshunov, M. M.
Theory of magnetic excitations in iron-based layered superconductors / M. M. Korshunov, I. . Eremin // Phys. Rev. B. - 2008. - Vol. 78, Is. 14. - Ст. 140509, DOI 10.1103/PhysRevB.78.140509. - Cited References: 31 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
NEUTRON-SCATTERING
   INSTABILITY
   STATE
   ORDER
   MODEL
Аннотация: Based on the effective four-band model we analyze the spin response in the normal and superconducting states of the Fe-pnictide superconductors. While the normal-state spin excitations are dominated by the continuum of the interorbital antiferromagnetic fluctuations and the intraband spin-density wave fluctuations, the unconventional superconductivity yields different feedback. The resonance peak in the form of the well-defined spin exciton occurs only for the interband scattering at the antiferromagnetic momentum Q(AFM) for the s(+/-) (extended s wave) superconducting order parameter and it disappears rapidly for q Q(AFM). The resonance feature is extremely weak for the d(x)(2)-y(2)-wave order parameter due to the specific Fermi-surface topology of these compounds. The essential difference between s(+/-)-wave and d(x)(2)-y(2)-wave symmetries for the magnetic excitations can be used for experimental determination of the superconducting wave-function symmetry.

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Держатели документа:
[Korshunov, M. M.
Eremin, I.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Eremin, I.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institute fur Mathematische und Theoretische Physik, Technische Universitat Braunschweig, D-38106 Braunschweig, Germany

Доп.точки доступа:
Eremin, I.; Коршунов, Максим Михайлович
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17.

Val'kov, V. V.
The role of anomalous strength operator in the high-T (c) superconductivity theory / V. V. Val'kov, A. A. Golovnya, D. M. Dzebisashvili // Physica B. - 2006. - Vol. 378-80: International Conference on Strongly Correlated Electron Systems (SECES 05) (JUL 26-30, 2005, Vienna, AUSTRIA). - P. 465-466, DOI 10.1016/j.physb.2006.01.202. - Cited References: 3 . - ISSN 0921-4526

РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
superconductivity -- t-J-model -- Superconductivity -- t- J-model -- Approximation theory -- Frequencies -- Mathematical operators -- Numerical methods -- Superconducting transition temperature -- Superconductivity -- Hubbard operator -- Matsubara frequency -- T- J-model -- High temperature superconductors
Аннотация: The diagram series structure for Matsubara Green's functions in the Hubbard operators representation have been analyzed for the superconducting (SC) phase in the t-J-model. It has been found that the Hubbard operator diagram technique besides anomalous self-energy operator includes also anomalous strength operator (ASO). With account for ASO Gor'kov equations have been written. ASO are shown to be very essential when anomalous averages are calculated. The anomalous self-energy operator and ASO were derived in one-loop approximation. It has turned out that strength operator components depend oil Matsubara frequency. As a result the SC phase is described by infinite set of integral equations. When deriving the equation for transition temperature in SC phase with s- and d-order parameter symmetry this system has been solved exactly. On the basis of numerical calculations it has been found that the account for strength operator components has fully suppressed SC phase with s-order parameter symmetry in the t-J-model. (c) 2006 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660075, Russia
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
ИФ СО РАН
L.V.Kirensky Institute of Physics, Krasnoyasrk 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660075, Russian Federation
Krasnoyarsk State Technical University, Krasnoyarsk, 660074, Russian Federation

Доп.точки доступа:
Golovnya, A. A.; Головня, Александр Александрович; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Вальков, Валерий Владимирович
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18.

The reason for implementation of the d–wave rather than s–wave pairing in cuprate superconductors / V. V. Val'kov [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. I2.2. - P. 122. - References: 6. - The work was supported by the RFBR, grant № 16-02-00073, 16-02-00304 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
cuprate superconductors -- spin-fermion model -- Coulomb repulsion

Доп.точки доступа:
Val'kov, V. V.; Вальков, Валерий Владимирович; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Korovushkin, M. M.; Коровушкин, Максим Михайлович; Barabanov, A. F.; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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19.

Komarov, K. K.
The origin of an inflection point on the temperature dependence of the London penetration depth in hole-doped cuprate high-temperature superconductors / K. K. Komarov, D. M. Dzebisashvili // J. Exp. Theor. Phys. - 2021. - Vol. 133, Is. 3. - P. 351-359, DOI 10.1134/S1063776121080021. - Cited References: 77. - This work was supported by the Russian Foundation for Basic Research, project nos. 18-02-00837 and 20-3270059 . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
MUON-SPIN-ROTATION
QUASI-PARTICLES
FERMI-SURFACE
Аннотация: A scenario of the formation of an experimentally observed inflection point on the temperature dependence of the London penetration depth λ in cuprate high-temperature superconductors (HTSCs) with optimal hole doping is discussed within the spin-polaron concept. It is shown that the reason for the appearance of an inflection point on the 1/λ2(T) dependence is due to the features of the energy spectrum of spin-polaron quasiparticles in the superconducting phase, as well as to the specific temperature dependence of their spectral density.

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Публикация на русском языке Комаров, Константин Константинович. Происхождение точки перегиба на температурной зависимости лондоновской глубины в дырочно-легированных купратных высокотемпературных сверхпроводниках [Текст] / К. К. Комаров, Д. М. Дзебисашвили // Журн. эксперим. и теор. физ. - 2021. - Т. 160 Вып. 3. - С. 415-425

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Комаров, Константин Константинович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-02-00837, 20-3270059]
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20.

The mechanisms responsible for broadening of the resistive transition under magnetic field in the Josephson junction network realized in bulk YBCO+CuO composites / D. A. Balaev [et al.] // Physica C. - 2006. - Vol. 435, Is. 1-2. - P. 12-15, DOI 10.1016/j.physc.2006.01.008. - Cited References: 15 . - ISSN 0921-4534

РУБ Physics, Applied
Рубрики:
SUPERCONDUCTORS
MODEL
Кл.слова (ненормированные):
Josephson network -- YBCO plus CuO composites -- dissipation -- magnetic field -- Dissipation -- Josephson network -- Magnetic field -- YBCO + CuO composites -- Composite materials -- Copper compounds -- Mathematical models -- Phase transitions -- Semiconductor junctions -- Yttrium compounds -- Creep model -- Josephson network -- YBCO + CuO composites -- Magnetic field effects
Аннотация: The experimental results of the effect of the magnetic field (up to 60 kOe) on the broadening of the resistive transition of bulk composites Y3/4Lu1/4Ba2CU3O7 (YBCO) + CuO are presented. These composites represent the network of the tunnel-type Josephson junctions where the copper oxide acts as a material forming barriers between YBCO crystallites. The mechanisms responsible for broadening of the resistive transition under magnetic field are discussed. The analysis of experimental R(7) dependences have shown that in the low field range 0-10(2) Oe, the R(7) dependences are described well by the Ambegaokar-Halperin (AH) model. In the range 10(3)-6 x 10(4) Oe, the dissipation follows Arrhenius law R similar to exp(-U(H)/k(B)T) characteristic for thermally activated flux creep model. In the range H similar to 10(2)-10(3), the crossover from AH to flux creep dissipation mechanisms occurs. (c) 2006 Elsevier B.V. All rights reserved.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Shaihutdinov, K. A.; Petrov, M. I.; Петров, Михаил Иванович; International Workshop on Weak Superconductivity(2005 ; Sept. ; 16-19 ; Bratislava, Slovakia)
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