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Determination of magnetic anisotropies and miscut angles in epitaxial thin films on vicinal (111) substrate by the ferromagnetic resonance / B. A. Belyaev [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P. 181-184, DOI 10.1016/j.jmmm.2016.12.081. - Cited References:16. - This work was supported by the Ministry of Education and Science of the Russian Federation, Task no. 3.528.2014K. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SURFACE
SPECTROMETER
SPINTRONICS
Кл.слова (ненормированные):
Thin film -- Ferromagnetic resonance -- Magnetic anisotropy -- Vicinal (111) -- surface -- Iron silicide
Аннотация: A method for determining magnetic anisotropy parameters of a thin single-crystal film on vicinal (111) substrate as well as substrate miscut angles from angular dependence of ferromagnetic resonance field has been proposed. The method is based on the following: (i) a new approach for the solution of the system of nonlinear equations for equilibrium and resonance conditions; (ii) a new expression of the objective function for the fitting problem. The study of the iron silicide films grown on vicinal Si(111) substrates with different miscut angles confirmed the efficiency of the method. The proposed method can be easily generalized to determine parameters of single-crystal films grown on substrates with an arbitrary cut.

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Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Yakovlev, I. A.; Ministry of Education and Science of the Russian Federation [3.528.2014K]; 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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    Toroidal Configuration of a Cholesteric Liquid Crystal in Droplets with Homeotropic Anchoring / M. N. Krakhalev [et al.] // JETP Letters. - 2019. - Vol. 109, Is. 7. - P. 478-481, DOI 10.1134/S0021364019070075. - Cited References: 30. - This work was supported by the Russian Science Foundation (project no. 18-72-10036). The work was performed using the equipment of the Shared Usage Center of High-Capacity Computational Resources, Moscow State University, supported by the Ministry of Education and Science of the Russian Federation (project no. RFMEFI62117X0011). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
NEMATIC DROPLETS
   SURFACE
Аннотация: Orientational structures formed in cholesteric droplets with homeotropic surface anchoring have been studied by means of polarization optical microscopy and computer simulations. It has been found that, when the ratio of the size of droplets to the pitch of a cholesteric helix ranges from 1.4 to 2.9, an axisymmetric toroidal cholesteric structure is formed with a topological linear defect in the form of an equatorially located surface ring. The features of the toroidal structure in cholesteric droplets and their optical textures for various observation schemes are examined in detail.

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Публикация на русском языке Тороидальная конфигурация холестерика в каплях с гомеотропным сцеплением [Текст] / М. Н. Крахалев [и др.] // Письма в ЖЭТФ. - 2019. - Т. 109 Вып. 7-8. - С. 487-491

Держатели документа:
Russian Acad Sci, Siberian Branch, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Rudyak, V. Yu.; Gardymova, A. P.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Russian Science Foundation [18-72-10036]; Ministry of Education and Science of the Russian Federation [RFMEFI62117X0011]
}
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    Muzalevskiy, K. V.
    Detection of soil freeze/thaw states in the Arctic region based on combined SMAP and AMSR-2 radio brightness observations / K. Muzalevskiy, Z. Ruzicka // Int. J. Remote Sens. - 2020. - Vol. 41, Is. 14. - P. 5046-5061, DOI 10.1080/01431161.2020.1724348. - Cited References: 36. - This study was funded by the SB RAS Program (project No. 0356-2019-0004). . - ISSN 0143-1161. - ISSN 1366-5901
   Перевод заглавия: Идентификация мёрзлого и талого состояния почвы в Арктическом регионе на основе данных наблюдений радиояркостной температуры SMAP и AMSR-2

РУБ Remote Sensing + Imaging Science & Photographic Technology
Рубрики:
L-BAND
   DIELECTRIC MODEL
   TEMPERATURE
   SURFACE
   FROZEN
   SMOS
Аннотация: In this study, a new approach to identify the freeze/thaw states of tundra topsoil was developed based on the polarization ratio index, which was calculated from the reflectivity values of soil. Reflectivity was estimated from radiometric measurements of the SMAP satellite using the values of vertical polarization brightness temperature measured by the AMSR-2 radiometer at 6.9 GHz; this value was used to characterize the effective temperature of the soil. The proposed approach was tested using weather station data on soil surface temperatures for six test sites located in the North Slope of Alaska and the Yamal Peninsula collected from April 2015 to June 2018. The modified polarization ratio index, calculated from values of reflectivity rather than from brightness temperatures, significantly improved the possibility of determining the reference values of the index in the winter and in the summer. During testing, the modified index showed a good correlation between the dates of transition through the threshold level and soil temperature transition through 0ºC, as recorded at meteorological stations.

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Держатели документа:
Russian Acad Sci, Lab Radiophys Earth Remote Sensing, Siberian Branch, Kirensky Inst Phys Fed Res Ctr,KSC, Krasnoyarsk, Russia.

Доп.точки доступа:
Ruzicka, Z.; Ружичка, Зденек; Музалевский, Константин Викторович; SB RAS Program [0356-2019-0004]
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Mironov, V. L.
Retrieving profile temperatures in a frozen topsoil near the TFS, Alaska, based on SMOS brightness temperatures at the 1.4-GHz frequency / V. L. Mironov, K. V. Muzalevskiy, Z. Ruzicka // IEEE Trans. Geosci. Remote Sensing. - 2016. - Vol. 54, Is. 12. - P. 7331-7338, DOI 10.1109/TGRS.2016.2599272. - Cited References:25. - This work was supported by the Russian Science Foundation through Project 4-17-00656. . - ISSN 0196-2892. - ISSN 1558-0644

РУБ Geochemistry & Geophysics + Engineering, Electrical & Electronic + Remote Sensing + Imaging Science & Photographic Technology
Рубрики:
DIELECTRIC MODEL
   ARCTIC SOIL
   SURFACE
   BOREAL
   TUNDRA
   GHZ
Кл.слова (ненормированные):
Microwave radiometry -- remote sensing -- soil measurements -- temperature -- measurement
Аннотация: In this paper, the method previously proposed in earlier work for measuring the temperature profile in a frozen topsoil using multiangular brightness temperature observations in the L-band has been experimentally tested. At a frequency of 1.4 GHz, full-polarization multiangular brightness temperature data were obtained from the Soil Moisture and Ocean Salinity (SMOS) satellite land product of Level 1C, with the SMOS footprint being centered at the Toolik Field Station (TFS), Alaska. The SMOS data covered the period from January 1, 2010 to December 31, 2011. Retrieval of the temperature profiles in a frozen topsoil was based on the semiempirical emission model L-MEB and the temperature-dependent dielectric model for an organic-rich tundra soil. The soil samples measured to develop the dielectric model were collected at the TFS site. For winter seasons, the retrieved temperature profiles in the 16.0-cm topsoil were validated relative to the temperature profiles measured in situ. As a result, the values of root-mean-square error and determination coefficient of the temperatures retrieved at the depths of 0.6, 8.7, and 16.0 cm, relative to the respective temperatures measured in situ, were found to be 2.8 °C, 4.9 °C, and 6.4 °C and 0.62, 0.42, and 0.26, respectively. The sources of error and possible improvements of the proposed retrieving algorithm were discussed. The major result of this study is the demonstration of the potential possibility for remote sensing of the temperature profile in a frozen arctic topsoil using the SMOS multiangular brightness data.

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Держатели документа:
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian State Aerosp Univ, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Muzalevskiy, K. V.; Музалевский, Константин Викторович; Ruzicka, Z.; Ружичка, Зденек; Миронов, Валерий Леонидович; Russian Science Foundation [4-17-00656]
}
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Determination of anchoring energy for nematic onto ferroelectric substrate / V. A. Gunyakov [et al.] // Solid State Commun. - 1993. - Vol. 87, Is. 9. - P. 751-753, DOI 10.1016/0038-1098(93)90406-D. - Cited References: 8 . - ISSN 0038-1098

РУБ Physics, Condensed Matter
Рубрики:
LIQUID-CRYSTALS
SURFACE
Аннотация: A technique to determine anchoring energy of planar MBBA layer with cleavage surfaces of triglycine sulphate is presented. The method is based on guest-host phenomenon in impure nematic. The anchoring energy W = (1.0 +/- 0.3).10(-4) erg/cm2 is calculated within Rapini-Papoular approximation.

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Держатели документа:
L.V. Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, 660036 Krasnoyarsk, Russian Federation
ИФ СО РАН

Доп.точки доступа:
Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Parshin, A. M.; Паршин, Александр Михайлович; Khrustalev, B. P.; Хрусталев, Борис Петрович; Shabanov, V. F.; Шабанов, Василий Филиппович
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Nickel-containing carbon nanotubes and nanoparticles prepared in a high-frequency arc plasma / I. V. Osipova [et al.] // Phys. Solid State. - 2009. - Vol. 51, Is. 9. - P. 1972-1975, DOI 10.1134/S1063783409090339. - Cited References: 6. - This study was supported in part by the Russian Foundation for Basic Research (project no. 08-08-00521) and the Integrated Interdisciplinary Project of the Siberian Branch of the Russian Academy of Sciences (project no. 12, decree no. 55). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
SURFACE
Аннотация: This paper presents the results of an investigation of nickel-containing carbon nanostructures prepared by plasma-chemical synthesis in a carbon-helium plasma jet at atmospheric pressure with the arc fed by a high-frequency current. It is demonstrated that, under these conditions, the conversion of graphite into a carbon condensate reaches 98 wt % and the contents of carbon nanotubes and nickel in this condensate are 72 and 10 wt %, respectively. Sequential treatment with nitric and hydrochloric acids has made it possible to extract purified carbon nanotubes and nickel nanoparticles coated with a carbon shell (approximately 50 nm thick) in which the nickel content is 4 wt %. Data are presented on the diameters of the prepared nanotubes and on the state of carbon in the samples.

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Держатели документа:
[Osipova, I. V.
Vnukova, N. G.
Zharkov, S. M.
Churilov, G. N.] Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660074, Russia
[Osipova, I. V.
Vnukova, N. G.
Glushchenko, G. A.
Krylov, A. S.
Zharkov, S. M.
Churilov, G. N.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Tomashevich, E. V.] Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660049, Russia
ИФ СО РАН
ИХХТ СО РАН

Доп.точки доступа:
Osipova, I. V.; Осипова, Ирина Владимировна; Vnukova, N. G.; Внукова, Наталья Григорьевна; Glushchenko, G. A.; Глущенко, Гарий Анатольевич; Krylov, A. S.; Крылов, Александр Сергеевич; Tomashevich, E. V.; Zharkov, S. M.; Жарков, Сергей Михайлович; Churilov, G. N.; Чурилов, Григорий Николаевич; Russian Foundation for Basic Research [08-08-00521]; Integrated Interdisciplinary Project of the Siberian Branch of the Russian Academy of Sciences [12, 55]
}
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Electron spectroscopy of iron disilicide / A. S. Parshin [et al.] // Tech. Phys. - 2016. - Vol. 61, Is. 9. - P. 1418-1422, DOI 10.1134/S1063784216090176. - Cited References: 33 . - ISSN 1063-7842

РУБ Physics, Applied
Рубрики:
SCATTERING CROSS-SECTIONS
   ENERGY-LOSS SPECTROSCOPY
   QUANTITATIVE-ANALYSIS
   LOSS SPECTRA
   SURFACE
   SI
   HETEROSTRUCTURES
   INTERFACE
   PARAMETER
   PHASE
Аннотация: We have reported on the results of a complex investigation of iron disilicide FeSi2 using characteristic electron energy loss spectroscopy, inelastic electron scattering cross section spectroscopy, and X-ray photoelectron spectroscopy. It has been shown that the main peak in the spectra of inelastic electron scattering for FeSi2 is a superposition of two unresolved peaks, viz., surface and bulk plasmons. An analysis of the fine structure of the spectra of inelastic electron scattering cross section by their decomposition into Lorentzlike Tougaard peaks has made it possible to quantitatively estimate the contributions of individual energy loss processes to the resulting spectrum and determine their origin and energy. © 2016, Pleiades Publishing, Ltd.

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Публикация на русском языке Исследование дисилицида железа методами электронной спектроскопии [Текст] / А. С. Паршин [и др.] // Журн. техн. физ. : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 86 Вып. 9. - С. 136–140

Держатели документа:
Rechetnev Siberian State Aerospace University, ul. Krasnoyarskii rabochii 31, Krasnoyarsk, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, Russian Federation
Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosobirsk, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodor 50/38, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Parshin, A. S.; Igumenov, A. Y.; Mikhlin, Y. L.; Pchelyakov, O. P.; Zhigalov, V. S.; Жигалов, Виктор Степанович
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    Krakhalev, M. N.
    Oblique light incidence method to study topological defects in nematic layers with conical boundary conditions / M. N. Krakhalev // Sci. Rep. - 2021. - Vol. 11, Is. 1. - Ст. 17433, DOI 10.1038/s41598-021-96784-9. - Cited References: 54 . - ISSN 2045-2322
   Перевод заглавия: Метод наклонного падения света для исследования топологических дефектов в нематических слоях с коническими граничными условиями

РУБ Multidisciplinary Sciences
Рубрики:
CHOLESTERIC FINGERS
   DISCLINATIONS
   SURFACE
   WALLS
   ORDER
Аннотация: A polarization microscopy method to investigate the orientational structures and boojums formed in the chiral and achiral nematic layers under conical (tilted) boundary conditions has been developed. Oblique light incidence on nematic layer is used, due to which the phase difference between the ordinary and extraordinary waves depends on the director’s azimuthal angle. The phase difference gets maximal when the director azimuthal angle of achiral nematic φ(x,y)=0 and an azimuthal angle at the center of the chiral nematic layer φ0(x,y)=0 independently of the total twist angle φTOTAL. It has been found that the m=+1 boojums with the phase ξ=±90° and ξ=(−90°+φTOTAL/2) are formed in achiral and chiral nematics, respectively, at the director tilt angle θd/2≅40° at the interface. In addition, the defectless structure of chiral nematic with the periodically variable azimuthal director angle on the substrates has been studied.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Крахалев, Михаил Николаевич
}
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Asymmetric interfaces in epitaxial off-stoichiometric Fe3+xSi1-x/Ge/Fe3+xSi1-x hybrid structures: Effect on magnetic and electric transport properties / A. S. Tarasov, I. A. Tarasov, I. A. Yakovlev [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 1. - Ст. 131, DOI 10.3390/nano12010131. - Cited References: 61. - The research was funded by RFBR, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-42-243007, and by the Government of the Russian Federation, Mega Grant for the Creation of Competitive World-Class Laboratories (Agreement no. 075-15-2019-1886). I.A.T. and S.N.V. thank RFBR, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-42-240012, for partial work related to the development of the simulation model of the pore autocorrelated radial distribution function coupled with the near coincidence site model, the Fe3+xSi1-x lattice distortion analysis, and processing Rutherford backscattering spectroscopy data. The Rutherford backscattering spectroscopy measurements were supported by the Ministry of Science and Higher Education of the Russian Federation (project FZWN-2020-0008) . - ISSN 2079-4991

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
FILMS
   ANISOTROPY
   SI(001)
   DEVICES
   SURFACE
   GROWTH
Кл.слова (ненормированные):
iron silicide -- germanium -- molecular beam epitaxy -- epitaxial stress -- lattice distortion -- dislocation lattices -- FMR -- Rutherford backscattering -- spintronics
Аннотация: Three-layer iron-rich Fe3+xSi1-x/Ge/Fe3+xSi1-x (0.2 < x < 0.64) heterostructures on a Si(111) surface with Ge thicknesses of 4 nm and 7 nm were grown by molecular beam epitaxy. Systematic studies of the structural and morphological properties of the synthesized samples have shown that an increase in the Ge thickness causes a prolonged atomic diffusion through the interfaces, which significantly increases the lattice misfits in the Ge/Fe3+xSi1-x heterosystem due to the incorporation of Ge atoms into the Fe3+xSi1-x bottom layer. The resultant lowering of the total free energy caused by the development of the surface roughness results in a transition from an epitaxial to a polycrystalline growth of the upper Fe3+xSi1-x. The average lattice distortion and residual stress of the upper Fe3+xSi1-x were determined by electron diffraction and theoretical calculations to be equivalent to 0.2 GPa for the upper epitaxial layer with a volume misfit of -0.63% compared with a undistorted counterpart. The volume misfit follows the resultant interatomic misfit of |0.42|% with the bottom Ge layer, independently determined by atomic force microscopy. The variation in structural order and morphology significantly changes the magnetic properties of the upper Fe3+xSi1-x layer and leads to a subtle effect on the transport properties of the Ge layer. Both hysteresis loops and FMR spectra differ for the structures with 4 nm and 7 nm Ge layers. The FMR spectra exhibit two distinct absorption lines corresponding to two layers of ferromagnetic Fe3+xSi1-x films. At the same time, a third FMR line appears in the sample with the thicker Ge. The angular dependences of the resonance field of the FMR spectra measured in the plane of the film have a pronounced easy-axis type anisotropy, as well as an anisotropy corresponding to the cubic crystal symmetry of Fe3+xSi1-x, which implies the epitaxial orientation relationship of Fe3+xSi1-x (111)[0-11] || Ge(111)[1-10] || Fe3+xSi1-x (111)[0-11] || Si(111)[1-10]. Calculated from ferromagnetic resonance (FMR) data saturation magnetization exceeds 1000 kA/m. The temperature dependence of the electrical resistivity of a Ge layer with thicknesses of 4 nm and 7 nm is of semiconducting type, which is, however, determined by different transport mechanisms.

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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC SB, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
RAS, Boreskov Inst Catalysis SB, Synchrotron Radiat Facil SKIF, Nikolskiy Prospekt 1, Koltsov 630559, Russia.
Immanuel Kant Balt Fed Univ, REC Smart Mat & Biomed Applicat, Kaliningrad 236041, Russia.
Immanuel Kant Balt Fed Univ, REC Funct Nanomat, Kaliningrad 236016, Russia.
Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany.
Univ Duisburg Essen, Ctr Nanointegrat, D-47057 Duisburg, Germany.

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Tarasov, I. A.; Тарасов, Иван Анатольевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Bondarev, I. A.; Бондарев, Илья Александрович; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Efimov, Dmitriy D.; Goikhman, Aleksandr Yu.; Belyaev, B. A.; Беляев, Борис Афанасьевич; Baron, F. A.; Барон, Филипп Алексеевич; Shanidze, Lev V.; Шанидзе, Лев Викторович; Farle, M.; Фарле, Михаель; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович; RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Regional Fund of Science [20-42-243007, 20-42-240012]; Government of the Russian Federation [075-15-2019-1886]; Ministry of Science and Higher Education of the Russian Federation [FZWN-2020-0008]
}
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10.

Val'kov, V. V.
Splitting of the spectrum of fermionic excitations in a topological insulator by charge fluctuations / V. V. Val'kov // JETP Letters. - 2021. - Vol. 114, Is. 12. - P. 751-756, DOI 10.1134/S0021364021240097. - Cited References: 22. - This work was supported by the Russian Foundation for Basic Research (project no. 19-02-00348) . - ISSN 0021-3640. - ISSN 1090-6487

РУБ Physics, Multidisciplinary
Рубрики:
HUBBARD FERMIONS
   EDGE STATES
   PHASE
   SURFACE
Аннотация: It is shown that the intersite Coulomb interaction of electrons in a topological insulator leads to the splitting of the initial energy structure and to the induction of two bands of fluctuation states. As a result, the total spectrum of Fermi excitations of the topological insulator has a four-band structure. The dielectric gap is determined by the energy interval between the bottom of the band of fluctuation states of conduction electrons and the top of the valence band of fluctuation states. Since the band of fluctuation states is narrow, quasiparticles with different effective masses appear.

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Публикация на русском языке Вальков, Валерий Владимирович. Расщепление спектра фермиевских возбуждений топологического изолятора зарядовыми флуктуациями [Текст] / В. В. Вальков // Письма в ЖЭТФ. - 2021. - Т. 114 Вып. 12. - С. 812-817

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

Доп.точки доступа:
Вальков, Валерий Владимирович; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-02-00348]
}
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