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Val'kov, V. V.
The nonuniform spin polarization in the square-shaped 1D wire induced by spin-orbit coupling / V. V. Val'kov, A. D. Fedoseev // J. Magn. Magn. Mater. - 2017. - Vol. 440. - P. 185-188, DOI 10.1016/j.jmmm.2016.12.080. - Cited References: 9. - The reported study was funded by Russian Foundation for Basic Research project nos. 16-42-242036, 16-42-243056, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project nos. 21/16, 29/16. . - ISSN 0304-8853

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

Кл.слова (ненормированные):
Spin polarization -- Rashba spin-orbit coupling
Аннотация: It is shown, that the Rashba spin-orbit coupling induces the spatially nonuniform spin state in the square-shaped 1D wire. The electron states of this type are characterized with spin orientation changing according to the harmonic motion along the square side. The period of the oscillation is determined only by the spin-orbital coupling and the hopping parameters ratio. The modulation of spin orientation is caused by step-like changing of Rashba field direction. The obtained results were generalized on the case of polygon-shaped wire.
Показано, что спин-орбитальное взаимодействие Рашбы индуцирует пространственно неоднородное спиновое состояние в 1D цепочке формы квадрата. Такие электронные состояния характеризуются изменением ориентации спина по гармоническому закону вдоль стороны квадрата. Период осцилляций определяется только отношением параметров перескока и спин-орбитального взаимодействия. Модуляция спиновой ориентации вызвана скачкообразным изменением направления поля Рашбы. Проведено обобщение полученных результатов на случай цепочке формы правильного многоугольника.

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Доп.точки доступа:
Fedoseev, A. D.; Федосеев, Александр Дмитриевич; Вальков, Валерий Владимирович; 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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Tsifrinovich, V. I.
Narrowing of nonuniform nmr lines in magnetics / V. I. Tsifrinovich // Fiz. Tverd. TelaVol. 23, Is. 12. - P. 3521-3525. - Cited References: 16 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
Цифринович, Владимир Ильич
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IGNATCHENKO, V. A.
PLASMA-WAVES IN NONUNIFORM SEMICONDUCTORS / V. A. IGNATCHENKO, Y. I. MANKOV, F. V. RAKHMANOV // Fiz. Tverd. Tela. - 1982. - Vol. 24, Is. 8. - P. 2292-2295. - Cited References: 3 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Доп.точки доступа:
MANKOV, Y. I.; RAKHMANOV, F. V.
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    Скоморохов, Георгий Витальевич.
    Неоднородности в распределении магнитных параметров тонких пленок NiFe вблизи их краев / Г. В. Скоморохов, Б. А. Беляев, П. Н. Соловьев // Магнитные материалы. Новые технологии : тез. докл. VIII Байкал. междунар. конф. BICMM-2018 / чл. прогр. ком. R. S. Iskhakov [et al.]. - Иркутск, 2018. - С. 16. - Библиогр.: 1 . - ISBN 978-5-00133-051-6
   Перевод заглавия: Nonuniform distribution of thin NiFe films magnetic parameters near their edges

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

Доп.точки доступа:
Iskhakov, R. S. \чл. прогр. ком.\; Исхаков, Рауф Садыкович; Ovchinnikov, S. G. \чл. прогр. ком.\; Овчинников, Сергей Геннадьевич; Aplesnin, S. S. \чл. прогр. ком.\; Аплеснин, Сергей Степанович; Balaev, D. A. \чл. прогр. ком.\; Балаев, Дмитрий Александрович; Беляев, Борис Афанасьевич; Belyaev, B. A.; Соловьев, Платон Николаевич; Solovev, P. N.; Skomorokhov, G. V.; Байкальская международная конференция "Магнитные материалы. Новые технологии"(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Magnetic materials. New tecnologies", Baikal International Conference(8 ; 2018 ; Aug. 24-28 ; Irkutsk); Иркутский государственный университет
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Shustin, M. S.
To an analytical theory of higher-order magnetic skyrmions in nonuniform magnetic fields / M. S. Shustin, D. M. Dzebisashvili, V. A. Stepanenko // Phys. Solid State. - 2023. - Vol. 65, Is. 6. - P. 978-986, DOI 10.21883/PSS.2023.06.56111.41H. - Cited References: 44. - The research was supported by ”BASIS“ Foundation for Development of Theoretic Physics and Mathematics (project No. 20-1-4-25-1), grant of the President of the Russian Federation MK-4687.2022.1.2, Krasnoyarsk Mathematical Center and financed by the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 075-02-2023-936) . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
magnetic skyrmions -- nonuniform magnetic fields
Аннотация: It is shown that axially symmetric inhomogeneous magnetic fields can lead to stabilization of higher-order magnetic skyrmions with topological charge |Q| ˃ 1 due to orbital effects. We developed the analytical theory on the energy, size, and domain wall width of the such skyrmions in a power-law inhomogeneous fields, with a parameters corresponding to strongly correlated electron systems. The results obtained may have applications in describing the formation of nontrivial magnetic structures in inhomogeneous fields of superconducting vortices in heterostructures superconductor – chiral magnet of the type [Ir1Fe0.5Co0.5Pt1]10/MgO/Nb.

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Публикация на русском языке Шустин, Максим Сергеевич. К аналитической теории магнитных скирмионов высокого порядка в неоднородном магнитном поле [Текст] / М. С. Шустин, Д. М. Дзебисашвили, В. А. Степаненко. - 10 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 6. - С. 1021-1030

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

Доп.точки доступа:
Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Stepanenko, V. A.; Шустин, Максим Сергеевич; Nanophysics and Nanoelectronics, International Symposium(27 ; 13-16 March 2023 ; Nizhny Novgorod, Russia)
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Shustin, M. S.
Higher-order magnetic skyrmions in nonuniform magnetic fields / M. S. Shustin, V. A. Stepanenko, D. M. Dzebisashvili // Phys. Rev. B. - 2023. - Vol. 107, Is. 19. - Ст. 195428, DOI 10.1103/PhysRevB.107.195428. - Cited References: 75. - The authors thank Prof. I. S. Burmistrov, S. Apostoloff, E. S. Andriyakhina, M. N. Potkina, and A. D. Fedoseev for fruitful discussions. S.M.S. acknowledges the support the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS” (Grant No. 20-1-4-25-1) and Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools (Grant No. MK-4687.2022.1.2). The analytical solution of systems of nonlinear algebraic equations was carried out by S.V.A. with the support by Krasnoyarsk Mathematical Center and financed by the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 075-02-2023-936) . - ISSN 2469-9950. - ISSN 2469-9969
Аннотация: For a two-dimensional Hubbard model with spin-orbit Rashba coupling in external magnetic field the structure of effective spin interactions is studied in the regime of strong electron correlations and at half-filling. It is shown that in the third order of perturbation theory, the scalar and vector chiral spin-spin interactions of the same order arise. The emergence of the latter is due to orbital effects of magnetic field. It is shown that for nonuniform fields, scalar chiral interaction can lead to stabilization of axially symmetric skyrmion states with arbitrary topological charges. Taking into account the hierarchy of effective spin interactions, an analytical theory on the optimal sizes of such states, the higher-order magnetic skyrmions, is developed for axially symmetric magnetic fields of the form h(r) ∼ rβ with ∊R.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia

Доп.точки доступа:
Stepanenko, V. A.; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Шустин, Максим Сергеевич
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Nonuniform Magnetic States and Electrical Properties SmXMnl-XS solid solutions [Text] / Aplesnin S.S.Har’kov A.M.Eremin E.V. [et al.] // IEEE International Magnetics Conference (INTERMAG ASIA-2011) : Book of abstracs. - 2011. - P257

Доп.точки доступа:
Aplesnin, S.S.; Har’kov, A.M.; Eremin, E.V.; Romanova, O.B.; Balaev, D.A.; Sokolov, V.V.; International Magnetics Conference(2011 ; Apr. ; 25-29 ; Taipei, Taiwan)
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Val'kov, V. V.
Splitting of the lower subband of Hubbard fermions in the Shubin-Vonsowsky model under the influence of strong intersite correlations / V. V. Val'kov, M. M. Korovushkin // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 1. - P. 108-120, DOI 10.1134/S1063776110061056. - Cited References: 26. - We express our deep gratitude to R. O. Zaitsev for numerous remarks and discussions. We are grateful to A. A. Golovnya, A. A. Shklyaev, and V. A. Mitskan for specific advice on the numerical calculations of the mass operator. This work was supported by the "Quantum Condensed Matter Physics" Program of the Presidium of the Russian Academy of Sciences, the Russian Foundation for Basic Research (project no. 10-02-00251), the "Scientific and Scientific-Pedagogical Personnel of Innovational Russian for 2009-2013" Federal Goal-Oriented Program, and the Interdisciplinary Integration Project no. 53 of the Siberian Branch of the Russian Academy of Sciences. One of us (M. K.) thanks Lavrentiev's contest of youth projects of the Siberian Branch of the Russian Academy of Sciences. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
NARROW ENERGY BANDS
ELECTRON CORRELATIONS
Кл.слова (ненормированные):
Cooper channels -- Cooper instability -- Density of electronic state -- Doping levels -- Electron concentration -- Energy structures -- Hubbard -- Hubbard operators -- Interaction energies -- Intersite correlation -- Mott-Hubbard insulator -- Nonuniform -- Renormalization -- Root mean squares -- Scattering amplitudes -- Spectral intensity -- Split-off band -- Strongly correlated fermions -- Sub-bands -- Doping (additives) -- Superconducting transition temperature
Аннотация: The diagram technique for Hubbard operators is used to investigate the influence of intersite Coulomb interactions on the energy structure and Cooper instability of strongly correlated fermions. Allowance for intersite correlations in doped Mott-Hubbard insulators is shown to lead to a splitting of the lower subband of Hubbard fermions and to the formation of a band of fluctuation states as soon as the intersite interaction energy becomes comparable to or exceeds the mean kinetic energy. The spectral intensity of the splitoff band is proportional to the root-mean-square fluctuation of the occupation numbers and increases with doping level. The predicted effect changes significantly the structure of the density of electronic states. This leads to a renormalization of the pole of the scattering amplitude in the Cooper channel and manifests itself as a nonuniform (in electron concentration) modification of the dependence of the critical superconducting transition temperature.

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Держатели документа:
[Val'kov, V. V.
Korovushkin, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Val'kov, V. V.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Korovushkin, M. M.; Коровушкин, Максим Михайлович; Вальков, Валерий Владимирович
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Karpov, S. V.
Simulation of conditions for fabrication of optical nanowaveguides in the form of chains of spherical metal nanoparticles by electrostatic functionalization of the process substrate / S. V. Karpov, I. L. Rasskazov // Colloid J. - 2013. - Vol. 75, Is. 3. - P. 279-288, DOI 10.1134/S1061933X13030083 . - ISSN 1061-933X
Кл.слова (ненормированные):
Deposition of metals -- Electrical parameter -- Experimental conditions -- Nonuniform electric field -- Ordered structures -- Selective deposition -- Single-domain structure -- Transmission property -- Deposition -- Electric fields -- Mathematical models -- Metal nanoparticles -- Photoexcitation -- Plasmons -- Sols -- Substrates
Аннотация: A method is proposed for electrostatic functionalization of substrates used to prepare ordered structures composed of closely spaced plasmon-resonant nanoparticles. The method ensures selective deposition of nanoparticles from the bulk of a colloidal system onto the substrates. This method is based on placing a metal nanotemplate of a required configuration at the opposite side of a substrate, with an electric potential being applied to the template. A mathematical model is developed to ensure that the system parameters responsible for the deposition of metal nanoparticles into ordered single-domain structures on the substrate from a bulk sol in a nonuniform electric field generated by the nanotemplate correspond to the real experimental conditions. Since the degree of imperfection of the synthesized chains governs the applicability of these structures to transmission of the optical excitation at the frequency of the surface plasmon of the particles, the dependence of the degree of imperfection on the physicochemical and electrical parameters of the system is studied using the Brownian-dynamics model. The calculations of the spectral and transmission properties of nanowaveguides of this type are exemplified. В© 2013 Pleiades Publishing, Ltd.

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Публикация на русском языке Моделирование условий синтеза оптических нановолноводов из цепочек сферических металлических наночастиц методом электростатической функционализации технологической подложки. - [S. l. : s. n.]

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660028, Russia;

Доп.точки доступа:
Рассказов, Илья Леонидович; Rasskazov, I. L.; Карпов, Сергей Васильевич
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10.

Nonuniform magnetic states and electrical properties of SmXMn1-XS solid solutions / S. S. Aplesnin [et al.] // IEEE Trans. Magn. - 2011. - Vol. 47, Is. 10. - P. 4413-4416, DOI 10.1109/TMAG.2011.2160715. - Cited References: 13 . - ISSN 0018-9464

РУБ Engineering, Electrical & Electronic + Physics, Applied

Кл.слова (ненормированные):
Conductivity -- magnetic semiconductors -- magnetization processes
Аннотация: The real and imaginary parts of magnetic permeability at the three frequencies 100 Hz, 1 kHz and 10 kHz and magnetic moment in magnetic field H = 0.05 T in the SmXMn1-XS(0.1 <= X <= 0.25) solid solutions at the temperatures 5 K-300 K were measured. Magnetization curves were measured in the range of fields -9 T < H < 9 T at the temperatures T = 5 K, 50 K. Non-linear behavior of the magnetization versus field, residual magnetic moment, logarithmic dependence of imaginary parts of the magnetic permeability maximum on frequency and sharp drop of Im(mu) at T < 40 K for compound Sm0.25Mn0.75 S were found. The electrical resistivity of the SmXMn1-X S(0.5 < x < 0.25) solid solution in the range of temperatures 80 K-300 K were measured. Minimum and maximum in the temperature dependence of the resistivity were found respectively at T = 220 K for X = 0.15 and at T = 100 K for X = 0.2 compounds. This behavior is explained a result of the mobility edge movement and the disorder of the deformation and spin density fluctuations with short-range order.

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Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Har'kov, A. M.; Eremin, E. V.; Еремин, Евгений Владимирович; Romanova, O. B.; Романова, Оксана Борисовна; Balaev, D. A.; Балаев, Дмитрий Александрович; Sokolov, V. V.; Соколов В. В.; Pichugin, A. Yu.; IEEE International Magnetics Conference(2011 ; Apr. ; 25-29 ; Taipei, Taiwan)
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