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    Korshunov, M. M.
    Band structure modification due to the spin-orbit coupling in the three-orbital model for iron pnictides / M. M. Korshunov, Y. N. Togushova // J. Sib. Fed. Univ. Math. Phys. - 2018. - Vol. 11, Is. 4. - P. 430-437 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2018-11-4-430-437. - Cited References: 14. - This work was supported in part by the Russian Foundation for Basic Research (grant 16-02-00098) and BASIS Foundation for Development of Theoretical Physics and Mathematics. . - ISSN 1997-1397. - ISSN 2313-6022
   Перевод заглавия: Изменение зонной структуры из-за спин-орбитального взаимодействия в трехорбитальной модели пниктидов железа

РУБ Physics
Рубрики:
SUPERCONDUCTING STATE
Кл.слова (ненормированные):
Fe-based superconductors -- spin-orbit coupling -- band structure -- Fermi surface -- сверхпроводники на основе железа -- спин-орбитальное взаимодействие -- зонная структура -- поверхность Ферми
Аннотация: We study the effect of the spin-orbit coupling on the band structure and the Fermi surface of the three-orbital model within the two-iron Brillouin zone. Due to the presence of two irons in the crystallographically correct unit cell, the spin-orbit coupling can be divided into the intra- and intercell parts with respect to the one-iron unit cell. We show that the intercell part produces the reconstruction of the Fermi surface in the form of the pronounced splitting between the previously degenerate electron (π, π)-pockets along the (0, π) - (π, π) direction. Intracell part shifts the bands around (0, 0) point and removes degeneracy there. There are also some other band shifts but they should not affect the low-energy physics because they occur at energy scales of about 1 eV below the Fermi level.
Исследовано влияние спин-орбитального взаимодействия на зонную сруктуру и поверхность Ферми трехорбитальной модели в зоне Бриллюэна двух атомов железа на ячейку. Из-за присутствия двух атомов железа в кристаллографической элементарной ячейке спин-орбитальное взаимодействие можно разделить на внутри- и межъячеечную части по отношению к элементарной ячейке решетки железа. Показано, что межъячеечная часть приводит к реконструкции поверхности Ферми в виде выраженного расщепления между ранее вырожденными электронными карманами в точке (π ;π ) вдоль направления (0; π) − (π; π). Внутриячеечная часть приводит к сдвигу зон вблизи точки (0; 0) и снимает там вырождение. Также имеют место другие сдвиги зон, но они не должны влиять на низкоэнергетическую физику, поскольку возникают на энергиях порядка 1 eV ниже уровня Ферми.

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Держатели документа:
Siberian Fed Univ, Svobodny 79, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Togushova, Yu.N.; Тогушова, Ю. Н.; Коршунов, Максим Михайлович; Russian Foundation for Basic Research [16-02-00098]; BASIS Foundation for Development of Theoretical Physics and Mathematics

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    Ivanov, D. A.
    Changes of the Fermi surface topology in the three-orbital model for iron pnictides with the spin-orbit coupling / D. A. Ivanov, Y. N. Togushova, M. M. Korshunov // J. Sib. Fed. Univ. Math. Phys. - 2023. - Vol. 16, Is. 6. - P. 795-803 ; Журн. СФУ. Матем. и физ. - Cited References: 28 . - ISSN 1997-1397. - ISSN 2313-6022
   Перевод заглавия: Изменение топологии поверхности Ферми в трехорбитальной модели пниктидов железа со спин-орбитальным взаимодействием
Кл.слова (ненормированные):
Fe-based superconductors -- spin-orbit coupling -- band structure -- Fermi surface -- сверхпроводники на основе железа -- спин-орбитальное взаимодействие -- зонная структура -- поверхность Ферми
Аннотация: Effect of the spin-orbit coupling on the band structure and the Fermi surface of the three-orbital model is studied. The inter-orbital part of the model is reformulated to fully conform with the iron lattice symmetry. Because there are two iron ions in the unit cell, we introduce the intra-and inter-ion spin-orbit coupling constants to separate the effect of the related couplings on the band structure and the Fermi surface. Both the intra-and inter-ion parts lift the degeneracy of some bands at the Γ = (0, 0) point and the splitting of bands along the (0, π) ‒ (π, π) direction of the Brillouin zone. We show that the inter-ion part of the spin-orbit coupling leads to the topological change of the Fermi surface — the splitting of two Fermi surface sheets around the M = (π, π) point.
Изучено влияние спин-орбитального взаимодействия на зонную структуру и поверхность Ферми в трехорбитальной модели. Межорбитальная часть модели изменена для полного соответствия с симметрией решетки железа. Из-за наличия двух ионов железа в элементарной ячейке мы вводим внутри- и межионную константы спин-орбитального взаимодействия для разделения эффектов соответствующих взаимодействий на зонную структуру и поверхность Ферми. И внутри, и межионная части снимают вырождение некоторых зон в точке Γ = (0, 0) и вырождение вдоль направления (0, π) − (π, π) зоны Бриллюэна. Показано, что межионная часть спин-орбитального взаимодействия приводит к изменению топологии поверхности Ферми, а именно к разделению листов поверхности Ферми вблизи точки M = (π, π).

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

Доп.точки доступа:
Togushova, Y. N.; Korshunov, M. M.; Коршунов, Максим Михайлович

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Decisive proofs of the s± → s++ transition in the temperature dependence of the magnetic penetration depth / V. A. Shestakov, M. M. Korshunov, Y. N. Togushova, O. V. Dolgov // Supercond. Sci. Technol. - 2021. - Vol. 34, Is. 7. - Ст. 075008, DOI 10.1088/1361-6668/abff6f. - Cited References: 40. - We are grateful to D V Efremov, A S Fedorov, S G Ovchinnikov, E I Shneyder, D Torsello, and A N Yaresko for useful discussions. This work was supported in part by the Russian Foundation for Basic Research (RFBR) Grant No. 19-32-90109 and by RFBR and Government of Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science to the Research Projects 'Electronic correlation effects and multiorbital physics in iron-based materials and cuprates' Grant No. 19-42-240007. . - ISSN 0953-2048. - ISSN 1361-6668

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
ORDER-PARAMETER
   IMPURITIES
   SUPERCONDUCTORS
   STATES
   MODEL
Кл.слова (ненормированные):
unconventional superconductors -- iron pnictides -- iron chalcogenides -- impurity scattering -- penetration depth
Аннотация: One of the features of the unconventional s± state in iron-based superconductors is possibility to transform to the s++ state with the increase of the nonmagnetic disorder. Detection of such a transition would prove the existence of the s± state. Here we study the temperature dependence of the London magnetic penetration depth within the two-band model for the s± and s++ superconductors. By solving Eliashberg equations accounting for the spin-fluctuation mediated pairing and nonmagnetic impurities in the T-matrix approximation, we have derived a set of specific signatures of the s± → s++ transition: (1) sharp change in the behavior of the penetration depth λL as a function of the impurity scattering rate at low temperatures; (2) before the transition, the slope of ΔλL(T) = λL(T) - λL(0) increases as a function of temperature, and after the transition this value decreases; (3) the sharp jump in the inverse square of the penetration depth as a function of the impurity scattering rate, λL-2(Γa), at the transition; (4) change from the single-gap behavior in the vicinity of the transition to the two-gap behavior upon increase of the impurity scattering rate in the superfluid density ρs(T).

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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
RAS, PN Lebedev Phys Inst, Moscow 119991, Russia.
Donostia Int Phys Ctr, San Sebastian 20018, Spain.

Доп.точки доступа:
Shestakov, V. A.; Шестаков, Вадим Андреевич; Korshunov, M. M.; Коршунов, Максим Михайлович; Togushova, Yu. N.; Тогушова Ю. Н.; Dolgov, O., V; Russian Foundation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR) [19-32-90109]; RFBRRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund of Science to the Research Projects 'Electronic correlation effects and multiorbital physics in iron-based materials and cuprates' [19-42-240007]
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    Details of the disorder-induced transition between s± and s++ states in the two-band model for Fe-based superconductors / V. A. Shestakov [et al.] // Supercond. Sci. Technol. - 2018. - Vol. 31, Is. 3. - Ст. 034001, DOI 10.1088/1361-6668/aaa501. - Cited References:62. - We are grateful to P D Grigor'ev and M V Sadovskii for useful discussions. This work was supported in part by the Russian Foundation for Basic Research (grant 16-02-00098) and Government Support of the Leading Scientific Schools of the Russian Federation (NSh-7559.2016.2). MMK and VAS acknowledge the support of the 'BASIS' Foundation for Development of Theoretical Physics and Mathematics. . - ISSN 0953-2048. - ISSN 1361-6668
   Перевод заглавия: Детали вызванного беспорядком перехода между s± и s++ состояниями в двузонной модели сверхпроводников на основе железа

РУБ Physics, Applied + Physics, Condensed Matter
Рубрики:
IRON-BASED SUPERCONDUCTORS
HIGH-TEMPERATURE SUPERCONDUCTIVITY
PAIRING
Кл.слова (ненормированные):
unconventional superconductors -- iron pnictides -- iron chalcogenides -- impurity scattering
Аннотация: IIrradiation of superconductors with different particles is one of many ways to investigate the effects of disorder. Here we study the disorder-induced transition between s ± and s ++ states in the two-band model for Fe-based superconductors with nonmagnetic impurities. Specifically, we investigate the important question of whether the superconducting gaps during the transition change smoothly or abruptly. We show that the behavior can be of either type and is controlled by the ratio of intraband to interband impurity scattering potentials, and by a parameter σ, that represents scattering strength and ranges from zero (Born approximation) to one (unitary limit). For the pure interband scattering potential and the scattering strength σ ≲ 0.11, the s ± → s ++ transition is accompanied by steep changes in the gaps, while for larger values of σ, the gaps change smoothly. The behavior of the gaps is characterized by steep changes at low temperatures, T˂ 0.1Tc0 with Tc0 being the critical temperature in the clean limit, otherwise it changes gradually. The critical temperature Tc is always a smooth function of the scattering rate in spite of the steep changes in the behavior of the gaps.

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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Leibniz Inst Festkorper & Werkstoffforsch, D-01069 Dresden, Germany.
Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
RAS, PN Lebedev Phys Inst, Moscow 119991, Russia.

Доп.точки доступа:
Shestakov, V. A.; Шестаков, Вадим Андреевич; Korshunov, M. M.; Коршунов, Максим Михайлович; Togushova, Yu.N.; Тогушова Ю. Н.; Efremov, D. V.; Dolgov, O. V.; Russian Foundation for Basic Research [16-02-00098]; Government Support of the Leading Scientific Schools of the Russian Federation [NSh-7559.2016.2]; 'BASIS' Foundation for Development of Theoretical Physics and Mathematics
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Does magnetic scattering always suppress superconducting transition? / O. V. Dolgov [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. I2.5. - P. 125. - We acknowledge partial support by RFBR (Grant RFBR 16-02-00098) . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
unconventional superconductivity -- impurities, pnictides -- multiband systems

Доп.точки доступа:
Dolgov, O. V.; Korshunov, M. M.; Коршунов, Максим Михайлович; Golubov, A. A.; Efremov, D. V.; 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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Korshunov, M. M.
Doping evolution of itinerant magnetic fluctuations in Fe-based pnictides / M. M. Korshunov, I. . Eremin // Europhys. Lett. - 2008. - Vol. 83, Is. 6. - Ст. 67003, DOI 10.1209/0295-5075/83/67003. - Cited References: 18. - We would like to thank B. BUCHNER, S.-L. DRECHSLER, D. EFREMOV, P. FULDE, I. MAZIN, R. MOESSNER and D. PARKER for useful discussions. IE acknowledges support from Volkswagen Foundation. . - ISSN 0295-5075

РУБ Physics, Multidisciplinary
Рубрики:
SUPERCONDUCTIVITY
ORDER
Аннотация: Employing the four-band tight-binding model, we study theoretically the doping dependence of the spin response in the normal state of novel Fe-based pnictide superconductors. We show that the commensurate spin density wave (SDW) transition that arises due to interband scattering between the hole alpha-pockets and the electron beta-pockets disappears already at the doping concentration x approximate to 0.04 reflecting the evolution of the Fermi surfaces. Correspondingly, with further increase of the doping the antiferromagnetic fluctuations are suppressed for x 0.1 and the imaginary part of the spin susceptibility at antiferromagnetic wave vector becomes nearly temperature independent. At the same time, we observe that the uniform susceptibility deviates from the Pauli-like behavior and is increasing with increasing temperature reflecting the activation processes for the alpha-Fermi surfaces up to temperatures of about T = 800 K. With increase of the doping the absolute value of the uniform susceptibility lowers and its temperature dependence changes. In particular, it is a constant at low temperatures and then decreases with increasing temperature. We discuss our results in a context of recent experimental data. Copyright (C) EPLA, 2008

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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, Siberian Branch, LV Kirensky Phys Inst, 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, 01187 Dresden, EU, Germany
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Institute fur Mathematische und Theoretische Physik, TU-Braunschweig, 38106 Braunschweig, EU, Germany
Kazan State University, 420008 Kazan, Russian Federation

Доп.точки доступа:
Eremin, I.; Коршунов, Максим Михайлович
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Extended s(+/-) scenario for the nuclear spin-lattice relaxation rate in superconducting pnictides / D. . Parker [et al.] // Phys. Rev. B. - 2008. - Vol. 78, Is. 13. - Ст. 134524, DOI 10.1103/PhysRevB.78.134524. - Cited References: 35 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
IMPURITIES
SCATTERING
GAPS
Аннотация: Recently, several measurements of the nuclear spin-lattice relaxation rate T(1)(-1) in the superconducting Fe pnictides have been reported. These measurements generally show no coherence peak below T(c) and indicate a low-temperature power-law behavior, the characteristics commonly taken as evidence of unconventional superconductivity with lines of nodes crossing the Fermi surface. In this work we show that (i) the lack of a coherence peak is fully consistent with the previously proposed nodeless extended s(+/-)-wave symmetry of the order parameter (whether in the clean or dirty limit) and (ii) the low-temperature power-law behavior can be also explained in the framework of the same model but requires going beyond the Born limit.

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Держатели документа:
[Parker, D.
Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Parker, D.] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany
[Dolgov, O. V.] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[Korshunov, M. M.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Golubov, A. A.] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands
[Parker, D.
Mazin, I. I.] USN, Res Lab, Washington, DC 20375 USA
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
Max-Planck-Institut fur Chemische Physik Fester Stoffe, D-01187 Dresden, Germany
Max-Planck-Institut fur Festkorperforschung, D-70569 Stuttgart, Germany
L.V. Kirensky Institute of Physics, Siberian Branch of RAS, 660036 Krasnoyarsk, Russian Federation
Faculty of Science and Technology, University of Twente, 7500 AE Enschede, Netherlands
Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375, United States

Доп.точки доступа:
Parker, D.; Dolgov, O. V.; Korshunov, M. M.; Коршунов, Максим Михайлович; Golubov, A. A.; Mazin, I. I.
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Korshunov, M. M.
Impurities in multiband superconductors / M. M. Korshunov, Y. N. Togushova, O. V. Dolgov // Physics-Uspekhi. - 2016. - Vol. 59, Is. 12. - P. 1211-1240, DOI 10.3367/UFNe.2016.07.037863. - Cited References: 200. - We acknowledge partial support by RFBR (grant 16-02-00098) and Government Support of the Leading Scientific Schools of the Russian Federation (NSh-7559.2016.2). . - ISSN 1063-7869
Кл.слова (ненормированные):
Unconventional superconductors -- Iron pnictides -- Iron chalcogenides -- Impurity scattering
Аннотация: Disorder impurities and defects violating the ideal long-range order is always present in solids. It can result in interesting and sometimes unexpected effects in multiband superconductors, especially if the superconductivity is uncon-ventional, thus having symmetry other than the usual s-wave. This paper uses the examples of iron-based pnictides and chal-cogenides to examine how both nonmagnetic and magnetic impurities affect superconducting states with s± and s++ order parameters. We show that disorder causes the transition between s± and s++ states and examine what observable effects this transition can produce. © 2016 Uspekhi Fizicheskikh Nauk, Russian Academy of Sciences.

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Публикация на русском языке Коршунов, Максим Михайлович. Примеси в многозонных сверхпроводниках [Текст] / М. М. Коршунов, Ю. Н. Тогушова, В. Г. Долгов // Успехи физ. наук : ред. журн. "Успехи физ. наук", 2016. - Т. 186 № 12. - С. 1315-1347

Держатели документа:
Kirensky Institute of Physics, Federal Research Center, Krasnoyarsk Science Center SB RAS, ul. Akademgorodok 50, str. 38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodnyi prosp. 79, Krasnoyarsk, Russian Federation
Max-Planck-Institut fur Festkorperforschung, Stuttgart, Germany
Lebedev Physical Institute, Russian Academy of Sciences, Leninskii prosp. 53, Moscow, Russian Federation

Доп.точки доступа:
Togushova, Yu.N.; Тогушова, Ю. Н.; Dolgov, O. V.; Коршунов, Максим Михайлович
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Multiband model for the dynamical conductivity of superconducting pnictides manifestation of impurity induced s±às++ transition / D. V. Efremov [et al.] // International conferences «Phase separation and Superstripes in High Temperature Superconductors and Related Materials (Superstripes-2012)». - 2012. - P. 127
Аннотация: The multiband (4 x4 bands) model and its reduction to the effective two-band model taking into account the strong interaction with intermediate spin-fluctuations have been successively applied to the description of the properties of Ba1-xKxFeAs2. On the base of this approach and using the extension of the formalism developed for the multiband system MgB2 we have calculated free energy and frequency dependent optical complex conductivity \ sigma ( \omega ,T) in the superconducting as well as the normal states of pnictides. An application of the presented approach to the ellipsometry data for single crystals of Ba1-xKxFeAs2 allows to describe some experimental features connected to multigap nature and strong coupling effects. Effects of rather strong nonmagnetic impurities beyond the Born approximation which can lead to the transitions in the superconducting order parameter S+- - S++ were investigated.

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Доп.точки доступа:
Efremov, D. V.; Korshunov, M. M.; Коршунов, Максим Михайлович; Golubov, A. A.; Dolgov, O. V.; Ettore Majorana Foundation, Centre for Scientific Culture; Rome International Center for Materials Science; International School of Solid State Physics; "Phase separation and Superstripes in High Temperature Superconductors and Related Materials", Int. Conf. (55 ; 2012 ; July ; 11-17 ; Erice (Sicily), Italy)
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10.

Nonanalytic Spin Susceptibility of a Fermi Liquid: The Case of Fe-Based Pnictides / M. M. Korshunov [et al.] // Phys. Rev. Lett. - 2009. - Vol. 102, Is. 23. - Ст. 236403, DOI 10.1103/PhysRevLett.102.236403. - Cited References: 41. - We thank R. Klingeler for useful discussions. M. M. K. acknowledges support from RFBR ( 09-02-00127) and the OFN RAS program on "Strong electronic correlations". I. E. acknowledges partial support from APCTP, NSF-DMR ( 0645461), and the RMHE Program ( Contract No. 2.1.1/3199). D. L. M. acknowledges support from Laboratoire de Physique des Solides, Universite Paris-Sud ( France) and RTRA Triangle de la Physique. A. V. C. acknowledges support from NSF-DMR 0604406. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
PHASE-TRANSITIONS
QUANTUM
Кл.слова (ненормированные):
Electron pockets -- Fermi energy -- Linear temperature dependence -- Pnictides -- Prefactor -- Quantitative agreement -- Spin susceptibility -- Temperature dependence -- Fermi liquids -- Fermions -- Liquids -- Magnetic susceptibility -- Temperature distribution -- Spin dynamics
Аннотация: We propose an explanation of the peculiar linear temperature dependence of the uniform spin susceptibility chi(T) in ferropnictides. We argue that the linear in T term appears to be due to the nonanalytic temperature dependence of chi(T) in a two-dimensional Fermi liquid. We show that the prefactor of the T term is expressed via the square of the spin-density-wave (SDW) amplitude connecting nested hole and electron pockets. Because of an incipient SDW instability, this amplitude is large, which, along with a small value of the Fermi energy, makes the T dependence of chi(T) strong. We demonstrate that this mechanism is in quantitative agreement with the experiment.

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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
[Efremov, D. V.] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany
[Maslov, D. L.] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[Chubukov, A. V.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
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, 38106 Braunschweig, Germany
Institut fur Theoretische Physik, Technische Universitat Dresden, 01062 Dresden, Germany
Department of Physics, University of Florida, Gainesville, FL 32611, United States
Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, United States
Kazan State University, 420087 Kazan, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Eremin, I.; Efremov, D. V.; Maslov, D. L.; Chubukov, A. V.; RFBR [09-02-00127]; OFN RAS; APCTP; NSF-DMR [0645461, 0604406]; RMHE [2.1.1/3199]; Laboratoire de Physique des Solides, Universite Paris-Sud (France); RTRA Triangle de la Physique
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