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Aksenov, S. V.
Strong Coulomb interactions in the problem of Majorana modes in a wire of the nontrivial topological class BDI / S. V. Aksenov, A. O. Zlotnikov, M. S. Shustin // Phys. Rev. B. - 2020. - Vol. 101, Is. 12. - Ст. 125431, DOI 10.1103/PhysRevB.101.125431. - Cited References: 60. - We acknowledge fruitful discussions with V. V. Valkov and V. A. Mitskan. The reported study was funded by the RAS Presidium programs for fundamental research Nos. 12 and 32, Russian Foundation for Basic Research (Projects No. 18-32-00443 and No. 19-02-00348), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: "Coulomb interactions in the problem of Majorana modes in low-dimensional systems with nontrivial topology" (Grant No. 19-42-240011). S.V.A. and A.O.Z. are grateful to the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, Projects No. MK-1641.2020.2 and No. MK-3594.2018.2. S.V.A. acknowledges the support from the Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" (Grant No. 18-46-007). . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
QUANTUM
   POLARIZATION
   TRANSITION
   FERMIONS
   SPECTRUM
   STATE
Аннотация: In this study, the problem of strong Coulomb interactions in topological superconducting wire is analyzed by means of the density-matrix-renormalization-group (DMRG) approach. To analyze properties of edge states in the BDI-class structure, a quantity called Majorana polarization is used. From its dependence on wire length and an entanglement-spectrum degeneracy, topological phase diagrams are obtained. The DMRG calculations for the Shubin-Vonsovsky-type model of the wire show the transformation of phases with Majorana single and double modes (MSMs and MDMs, respectively) under the increase of onsite and intersite correlations. In particular, we demonstrate different scenarios including the possibilities of both induction and suppression of the MSMs and MDMs. It is shown that in the strongly correlated regime, the contributions of single-particle excitations to the Majorana-type states significantly decrease at low magnetic fxields. Moreover, the t-J*-V model is derived allowing to study the effective interactions and improve the DMRG numerics. It is found out that in the limiting case of the effective Hamiltonian with infinitely strong onsite repulsion, t model, the topological phases are destroyed. Finally, the ways to probe the MSMs and MDMs via the features of caloric functions are discussed.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Shustin, M. S.; Шустин, Максим Сергеевич; Аксенов, Сергей Владимирович; RAS Presidium programs for fundamental research [32, 12]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-32-00443, 19-02-00348]; Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [19-42-240011]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK-1641.2020.2, MK-3594.2018.2]; Foundation for the Advancement of Theoretical Physics and Mathematics "BASIS" [18-46-007]
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    Aleksandrov, K. S.
    Crystal chemistry and prediction of compounds with a structure of skutterudite type / K. S. Aleksandrov, B. V. Beznosikov // Crystallogr. Rep. - 2007. - Vol. 52, Is. 1. - P. 28-36, DOI 10.1134/S106377450701004X. - Cited References: 47 . - ISSN 1063-7745
Рубрики:
SUPERCONDUCTOR PROS4SB12
   MAGNETIC-PROPERTIES
   HIGH-PRESSURE
   RARE-EARTH
   TRANSITION
   LAFE4P12
Аннотация: Crystallochemical analysis of skutterudite-type structures in the BX3, AB(4)X(12), and A B-3' B4O12 compositions (A and B are metals; X = P, As, Sb) has been performed. Probable regions of structure formation are determined, thereby indicating that more than 270 new compounds of the AB4X12 composition can be synthesized.(1)

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Публикация на русском языке Александров, Кирилл Сергеевич. Кристаллохимия и прогноз соединений со структурой типа скуттерудита [Текст] / К. С. Александров, Б. В. Безносиков // Кристаллография. - 2007. - Т. 52 Вып. 1. - С. 32-40

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

Доп.точки доступа:
Beznosikov, B. V.; Безносиков, Борис Валерьевич; Александров, Кирилл Сергеевич
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    Anionic-cationic surfactant mixture providing the electrically controlled homeotropic surface anchoring of liquid crystals / M. N. Krakhalev [et al.] // J. Mol. Liq. - 2019. - Vol. 282: Suzdal Conference (2018, Suzdal, RUSSIA). - P. 57-62, DOI 10.1016/j.molliq.2019.02.132. - Cited References: 30. - The reported study was supported by the Belarusian Republican Foundation for Fundamental Research (project No X16P-110) and Russian Foundation for Basic Research (RFBR) (project No 16-53-00073). Mikhail N. Krakhalev and Vitaly S. Sutormin acknowledge financial support from RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (project No 18-42-243006). . - ISSN 0167-7322. - ISSN 1873-3166
   Перевод заглавия: Смесь анионного и катионного сурфактантов, обеспечивающая электроуправляемое гомеотропное поверхностное сцепление в жидких кристаллах

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
IONIC MODIFICATION
   TRANSITION
   DROPLETS
   CONFIGURATION
   LAYER
Кл.слова (ненормированные):
Polymer dispersed liquid crystal -- Nematic droplet -- Ionic surfactant -- Anchoring transition -- Director configuration -- Optical texture
Аннотация: In search of a substance able to function as an anionic surfactant applied for the electrically-induced anchoring transitions in liquid crystals, the compound 4-heptyloxybenzoate benzyl dodecyldimethylammonium (HOBBDDA) has been synthesized. Its orienting influence on nematic liquid crystal 4-pentyl-4'-cyanobiphenyl (5CB) has been tested. HOBBDDA dissolved up to 1.4%in 50 droplets dispersed in polymer film does not change the tangential surface anchoring inherent to polyvinyl alcohol matrix used. Homeotropic surface anchoring is realized if the HOBBDDA content exceeds 1.7%. The molecules of the surfactant in 5CB dissociate into anions and cations. The anions modify the surface anchoring under the action of DC electric field both in the normal and inverse mode. The mixture of HOBBDDA and cetyltrimethylammonium bromide can function as a binary ionic cationic surfactant which significantly expands the prospects for using the ionic-surfactant method to control liquid crystal materials. (C) 2019 Elsevier B.V. All rights reserved.

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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.
Belarusian State Technol Univ, Minsk 220006, BELARUS.

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Kuz'menok, N. M.; Mikhalyonok, S. G.; Bezborodov, V. S.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Belarusian Republican Foundation for Fundamental Research [X16P-110]; Russian Foundation for Basic Research (RFBR) [16-53-00073]; RFBR, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-42-243006]; International conference on Hole Burning, Single Molecule, and Related Spectroscopies: Science and Applications - 2018(XIII ; August 6-12, 2018 ; Suzdal - Moscow, Russia)
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Aplesnin, S. S.
Anomalies in magnetoresistance and in the bulk modulus for ferromagnetics with four-spin exchange interaction on the Kondo lattice / S. S. Aplesnin, N. I. Piskunova // J. Phys.: Condens. Matter. - 2006. - Vol. 18, Is. 29. - P. 6859-6868, DOI 10.1088/0953-8984/18/29/023. - Cited References: 29 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
MIXED-VALENCE MANGANITES
   PHASE-SEPARATION
   LA1-XSRXMNO3
   BEHAVIOR
   PECULIARITIES
   TRANSITION
Кл.слова (ненормированные):
Elastic moduli -- Electric resistance -- Ferromagnetism -- Function evaluation -- Paramagnetism -- Transceivers -- Adiabatic approximation -- Kondo lattice -- Paramagnetic state -- Ring exchange -- Magnetoresistance
Аннотация: The temperature dependence of resistivity and the bulk modulus are calculated on the Kondo lattice, with ring exchange between localized spins, using the spin-polaron and adiabatic approximation. Peak and zero values of the bulk modulus as functions of temperature and concentration are determined below the temperature of the transition to the paramagnetic state. The effects of the nearest order between transverse spin components and a value of the ring exchange between localized spins on magnetoresistivity are estimated.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
L v Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
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Aplesnin, S. S.
Existence of massive singlet excitations in an antiferromagnetic alternating chain with S=1/2 / S. S. Aplesnin // Phys. Rev. B. - 2000. - Vol. 61, Is. 10. - P. 6780-6784, DOI 10.1103/PhysRevB.61.6780. - Cited References: 26 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
PEIERLS COMPOUND CUGEO3
SPIN SYSTEMS
TRANSITION
Аннотация: The one-dimensional Heisenberg model with alternating antiferromagnetic bond and spin-1/2 has been studied by the Monte Carlo method. The thermodynamic characteristics, spin-spin, and four spin-correlation function have been calculated. From several maxima of the correlation radius of the four spin-correlation function and sharp slopes of the dimer order parameter, a longitudinal component of the total spin square as a function of temperature and magnetic field, the existence of two mass singlet excitation branches with Delta S-z=0 and one triplet with Delta S-z=1 is suggested. Critical temperatures and fields related to singlet filled bands have been estimated. From these results low-temperature (TT-SP) properties of spin-Peierls (SP) compounds CuGeO3 and NaV2O5 have been explained.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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Aplesnin, S. S.
Magnetoresistance effect in anion-substituted manganese chalcogenides / S. S. Aplesnin, O. B. Romanova, K. I. Yanushkevich // Phys. Status Solidi B. - 2015. - Vol. 252, Is. 8. - P. 1792-1798, DOI 10.1002/pssb.201451607. - Cited References: 35. - This study was supported by the official assignment no. 114090470016. . - ISSN 0370. - ISSN 1521-3951. -

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
   ELECTRONIC-STRUCTURE
   SOLID-SOLUTIONS
   MnTe
   MnSe
   CONDUCTIVITY
   TRANSITION
Кл.слова (ненормированные):
Electron tunneling -- Magnetic properties -- Magnetoresistance -- Semiconductors
Аннотация: The electric and magnetic properties of anion-substituted antiferromagnetic MnSe1-xTex (0.1≤x≤0.4) semiconductors in the 77-700K temperature range and magnetic fields under 1T are studied. In the MnSe1-xTex solid solutions, negative magnetoresistance in the vicinity of the Néel temperature for x=0.1 and for composition with x=0.2 in the paramagnetic range below 270K is revealed. A dependence of the magnetic susceptibility versus the prehistory of the samples is found. The model of localized spin-polarized electrons with the localization radius depending on the magnetic field is proposed for x=0.1. In the paramagnetic range, the negative magnetoresistance and the behavior of magnetic moment are a result of orbital glass formation.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University M F Reshetnev, Krasnoyarsky Rabochy Av. 31, Krasnoyarsk, Russian Federation
Scientific-Practical Materials Research Center NAS, P. Brovski Str.19, Minsk, Belarus

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Янушкевич, Казимир Иосифович; Yanushkevich K. I.; Аплеснин, Сергей Степанович
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Aver'yanov, E. M.
Dimension of mesogenic molecules as atomic clusters / E. M. Aver'yanov // Phys. Solid State. - 2005. - Vol. 47, Is. 2. - P. 378-389, DOI 10.1134/1.1866424. - Cited References: 19 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
LIQUID-CRYSTAL CHEMISTRY
ORIENTATIONAL ORDER
TRANSITION
Аннотация: The problem regarding the mass dimension D of mesogenic molecules as atomic clusters is formulated and solved using computer simulation and analytical calculations. For a large number of compounds belonging to different chemical classes, it is shown that the cores of discotic lacunar (rodlike, lathlike) molecules forming nematic or columnar discotic (calamitic) phases have a fractional dimension 1 D-c 2 (D-c approximate to 1). The dependences of the dimension D-c on the symmetry, the conformation, and the structural-chemical features of the molecular core are determined. It is demonstrated that, in the region of side flexible chains in molecules of both types, the dimension D-ch can be either smaller or larger than unity, depending on the chain conformation. An analytical expression accounting for the results of numerical experiments is obtained for the dimension D-ch. (C) 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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Aver'yanov, E. M.
Influence of nematic and smectic orders on polarizability of molecules of ethyl-p-(4-ethoxybenzylideneamino-)alpha-methyl cinnamate liquid crystals / E. M. Aver'yanov // Phys. Solid State. - 2013. - Vol. 55, Is. 11. - P. 2391-2396, DOI 10.1134/S1063783413110048. - Cited References: 16 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
TRANSITION
MBBA
Аннотация: Experimental values of the polarizability tensor gamma components of molecules of ethyl-p-(4-ethoxybenzylideneamino-)alpha-methyl cinnamate liquid crystals in the nematic and smectic A phases have been obtained. Quadratic dependences of the longitudinal, gamma (l) , and transverse, gamma (t) , components, the mean value , and anisotropy Delta gamma in both phases have been established as functions of the orientational order parameter S of molecules in a maximally wide range of S. The nematic-smectic A phase transition with a continuous variation of S manifests itself as kinks in the linear dependences of , Delta gamma, and gamma (l) on S (2) and does not influence the dependence gamma (t) (S (2)). The observed dependences have been derived in the framework of the theory of the nematic-smectic A phase transition. The factors responsible for different influences of the orientational and positional orderings of molecules on the polarizability parameters have been determined.

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Публикация на русском языке Аверьянов, Евгений Михайлович. Влияние нематического и смектического порядка на поляризуемость молекул жидкого кристалла этил-p-(4-этоксибензилиденамино-)α-метилциннамата / Е. М. Аверьянов // Физика твердого тела. - 2013. - Т. 55, вып. 11. - С. 2271-2275

Доп.точки доступа:
Аверьянов, Евгений Михайлович
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Aver'yanov, E. M.
Orientational order and polarizability of molecules in a nematic liquid crystal / E. M. Aver'yanov // Phys. Solid State. - 2014. - Vol. 56, Is. 5. - P. 1058-1063, DOI 10.1134/S1063783414050035. - Cited References: 17 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
NORMAL-BUTYLANILINE MBBA
   INTERNAL-ROTATION
   TRANSITION
   PHASE
Аннотация: The influence of the orientational order of molecules in a nematic liquid crystal on the mean value ?? and anisotropy ?? of the molecular polarizability has been studied in the framework of the molecular statistical approach with allowance for the perturbation of the electronic structure of molecules due to the change in the conformation of their aromatic core and intermolecular interactions. Experimental dependences of ?? and ?? on the molecular orientational order parameter S have been derived, and their specific features for the known objects have been explained. The possibility of separating the contributions of opposite signs to the dependence ??(S) due to the change in the conformation of molecules and intermolecular interactions has been shown using nematic MBBA as an example. © 2014 Pleiades Publishing, Ltd.

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Публикация на русском языке Аверьянов, Евгений Михайлович. Ориентационный порядок и поляризуемость молекул в нематическом жидком кристалле [Текст] / Е. М. Аверьянов // Физ. тверд. тела. - 2014. - Т. 56 Вып. 5.- P.1019-1023

Доп.точки доступа:
Аверьянов, Евгений Михайлович
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10.

AVERYANOV, E. M.
POLARIZED LUMINESCENCE SPECTRUM OF IMPURITY LIQUID-CRYSTAL - THE DEGENERATION LIFTED AND RENEWED BY RELAXATION / E. M. AVERYANOV // Zhurnal Eksperimentalnoi Teor. Fiz. - 1993. - Vol. 103, Is. 6. - P. 2018-2038. - Cited References: 45 . - ISSN 0044-4510

РУБ Physics, Multidisciplinary
Рубрики:
RESOLVED FLUORESCENCE DEPOLARIZATION
   UNIAXIAL MOLECULAR SAMPLES
   NEMATIC ORDER PARAMETERS
   EXCITED-STATES
   SPECTROSCOPY
   MEMBRANES
   FLUOROPHORES
   ORIENTATION
   TRANSITION
   DYES
Аннотация: The general molecular-statistical approach is proposed for the analysis or the polarized luminescence spectrum for impurity molecule of an arbitrary symmetry in the nematic liquid crystal matrix. On the particular example of uniaxial molecules the influence of features of the molecular electron structure, orientational statistics, molecular dynamics, and features of the anisotropic intermolecular coupling upon the positions of maxima v(if)(t) of impurity fluorescence polarized bands J(ij)(t) is studied. For the first time it is shown that all these factors significantly affect the degree of spectrum v(ij)(t) degeneration. For t not-equal 0, relaxation of excited impurity molecule subsystem toward the orientational distribution lifts a partial degeneration of spectrum v(ij), occuring at t not-equal 0, and renews partial or total degeneration of spectrum v(ij) in the limit t = infinity. In the lack of the spectrum v(ij) degeneration for t = 0 the relaxation may restore partial degeneration for t not-equal 0 as a function of the features of electron structure of molecules. The results of work explain the familiar experimental data on the number of independent component v(ij) and relation between them, on dependence of v(ij) upon the order of matrix and impurity subsystem, on the mutual relation in the positions of impurity band polarized component in the absorption and fluorescence spectra.

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