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Magnetic-field-induced structural transition in polymer-dispersed liquid crystals / A. M. Parshin [et al.] // Mol. Cryst. Liquid Cryst. - 2012. - Vol. 557, Is. 1. - P. 50-59, DOI 10.1080/15421406.2011.632237. - Cited References: 19. - This study was supported by the Presidium of the Russian Academy of Sciences (Project no. 24.1) and the Siberian Branch of the Russian Academy of Sciences (grant no. 43). . - ISSN 1542-1406

РУБ Crystallography
Рубрики:
FRANK CONSTANTS
   ELECTRIC-FIELD
   NEMATIC DROPS
   ANISOTROPY
   ALIGNMENT
   FILMS
   ORDER
Кл.слова (ненормированные):
Anchoring energy -- magnetic field -- polymer-dispersed liquid crystals -- structural transition -- temperature fluctuations
Аннотация: The structural transition occurring in droplets of nematic liquid crystals formed in a polymer in magnetic field is studied. The transition is caused by field-driven weakening of tangential surface anchoring and develops following two scenarios: bipolar structure/homogeneous structure or bipolar structure/radial structure. The first scenario suggests a cyclic transition occurring upon thermal fluctuations without field. The structural transition is considered within a model of the biaxial liquid crystal/polymer interface. The model describes tendency of the nematic director to align tangentially on a droplet's surface, normally under the action of flexoelectric polarization, and axially along the magnetic-field-imposed easy orientation axis.

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Держатели документа:
[Parshin, A. M.
Nazarov, V. G.
Zyryanov, V. Ya.
Shabanov, V. F.] Krasnoyarsk Sci Ctr, LV Kirensky Inst Phys, Krasnoyarsk, Russia

Доп.точки доступа:
Parshin, A. M.; Паршин, Александр Михайлович; Nazarov, V. G.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович
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    Bulgakov, E. N.
    Induced tunneling and localization for a quantum particle in tilted two-dimensional lattices / E. N. Bulgakov, A. R. Kolovsky // Phys. Rev. B. - 2014. - Vol. 89, Is. 3. - Ст. 035116, DOI 10.1103/PhysRevB.89.035116. - Cited References: 17. - The authors express their gratitude to D. N. Maksimov for useful remarks and acknowledge financial support of the Russian Academy of Sciences through the SB RAS integration project No. 29 Dynamics of atomic Bose-Einstein condensates in optical lattices. . - ISSN 1098-0121. - ISSN 1550-235X
   Перевод заглавия: Индуцированное туннелирование и локализация квантовой частицы в наклонных двухмерных решетках

РУБ Physics, Condensed Matter
Рубрики:
DYNAMIC LOCALIZATION
   CHARGED-PARTICLE
   OPTICAL LATTICE
   ELECTRIC-FIELD
   DIRAC POINTS
Аннотация: We consider a quantum particle in tilted two-dimensional lattices in the tight-binding approximations. We show that for certain lattice geometries the particle can freely move across the lattice in the direction perpendicular to the vector of the static force. This effect is argued to be analog of the photon-induced tunneling in driven one-dimensional lattices. We calculate the particle dispersion relation by using a method based on the Bogoliubov-Mitropolskii averaging technique from the theory of dynamical systems. This dispersion relation draws the analogy with driven one-dimensional lattices further by eventually showing band collapses when a control parameter is varied.

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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Kolovsky, A. R.; Коловский, Андрей Радиевич; Булгаков, Евгений Николаевич; Russian Academy of Sciences through the SB RAS [29]
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Voltage-induced defect mode coupling in a one-dimensional photonic crystal with a twisted-nematic defect layer / I. V. Timofeev [et al.] // Phys. Rev. E. - 2012. - Vol. 85, Is. 1. - Ст. 11705, DOI 10.1103/PhysRevE.85.011705. - Cited References: 39. - This work was supported in part by DSP Grant No. 2.1.1/3455; RAS Grants No. 3.9.1 and No. 21.1, SB RAS Grants No. 5 and No. 144, and by the National Science Council of Taiwan under Grant No. NSC 98-2923-M-033-001-MY3. . - ISSN 1539-3755

РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
LIQUID-CRYSTAL
   REFLECTION SPECTRUM
   OPTICAL-PROPERTIES
   ANISOTROPIC MEDIA
   ELECTRIC-FIELD
   EIGENVALUES
   ORIENTATION
Аннотация: Defect modes are investigated in a band gap of an electrically tunable one-dimensional photonic crystal infiltrated with a twisted-nematic liquid crystal. Their frequency shift and interference under applied voltage are studied both experimentally and theoretically. We deal with the case where the defect layer thickness is much larger than the wavelength (i.e., the Mauguin condition). It is shown theoretically that the defect modes could have a complex structure with elliptic polarization. Two series of polarized modes are coupled with each other and exhibit an avoided crossing phenomenon in the case of opposite parity.

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Держатели документа:
[Timofeev, Ivan V.
Gunyakov, V. A.
Myslivets, Sergey A.
Arkhipkin, V. G.
Zyryanov, Victor Ya] Russian Acad Sci, Krasnoyarsk Sci Ctr, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Timofeev, Ivan V.
Gunyakov, Vladimir A.
Arkhipkin, V/ G.
Vetrov, Stepan Ya] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Lin, Yu-Ting] Chung Yuan Christian Univ, Master Program Nanotechnol, Chungli 32023, Taiwan
[Lee, Wei] Chung Yuan Christian Univ, Dept Phys, Chungli 32023, Taiwan
[Lee, Wei] Chung Yuan Christian Univ, Ctr Nanotechnol, Chungli 32023, Taiwan
[Zyryanov, Victor Ya] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Lin, Y. T.; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vetrov, S. Y.; Lee, W.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
}
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Reflection and refraction of bulk acoustic waves in piezoelectrics under uniaxial stress / S. I. Burkov [et al.] // Acoust. Phys. - 2009. - Vol. 55, Is. 2. - P. 178-185, DOI 10.1134/S1063771009020055. - Cited References: 10 . - ISSN 1063-7710
Рубрики:
ELECTRIC-FIELD
Аннотация: Basic equations that describe the conditions of reflection and refraction of bulk acoustic waves at the boundary between acentric crystalline media under uniaxial stress are presented. The effect of uniaxial stress on the anisotropy of reflection and refraction of bulk acoustic waves is numerically analyzed for boundaries of the crystal-vacuum, piezoelectric crystal-piezoelectric crystal, and piezoelectric crystal-elastic isotropic medium types.

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Публикация на русском языке Отражение и преломление объемных акустических волн в пьезоэлектриках при воздействии одноосноного напряжения [Текст] / С. И. Бурков [и др.] // Акуст. журн. - 2009. - Т. 55 № 2. - С. 180-187

Держатели документа:
[Burkov, S. I.
Sorokin, B. P.
Karpovich, A. A.] Siberian Fed Univ, Krasnoyarsk 660049, Russia
[Aleksandrov, K. S.] Russian Acad Sci, Siberian Div, Kirenskii Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Burkov, S. I.; Sorokin, B. P.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Karpovich, A. A.
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Alekseev, K. N.
Pendulum limit, chaos and phase-locking in the dynamics of ac-driven semiconductor superlattices / K. N. Alekseev, F. V. Kusmartsev // Phys. Lett. A. - 2002. - Vol. 305, Is. 5. - P. 281-288, DOI 10.1016/S0375-9601(02)01420-2. - Cited References: 60 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
STRANGE NONCHAOTIC ATTRACTORS
   DC VOLTAGE GENERATION
   JOSEPHSON-JUNCTIONS
   GAAS/ALAS SUPERLATTICE
   BLOCH OSCILLATIONS
   TERAHERTZ RADIATION
   ELECTRIC-FIELD
   THZ RADIATION
   FREQUENCY
   TRANSPORT
Кл.слова (ненормированные):
semiconductor superlattice -- pendulum -- chaos -- phase-locking -- Josephson junction -- Chaos -- Josephson junction -- Pendulum -- Phase-locking -- Semiconductor superlattice -- analytic method -- analytical parameters -- article -- dynamics -- electric potential -- semiconductor -- temperature
Аннотация: We describe a limiting case when nonlinear dynamics of an ac-driven semiconductor superlattice in the miniband transport regime is governed by a periodically forced and damped pendulum equations. We find analytically the conditions for a transition to chaos. With increasing temperature the chaos disappears. We also discuss fractional do voltage states in a superlattice originating from phase-locked states of the pendulum. (C) 2002 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Oulu Univ, Dept Phys Sci, FIN-90014 Oulu, Finland
LV Kirenskii Inst Phys, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Loughborough Univ Technol, Dept Phys, Loughborough LE11 3TU, Leics, England
ИФ СО РАН
Department of Physical Sciences, University of Oulu, P.O. Box 3000, FIN-90014, Oulu, Finland
Theory of Nonlin. Proc. Laboratory, Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom

Доп.точки доступа:
Kusmartsev, F. V.
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Wannier-Stark resonances in semiconductor superlattices / M. . Gluck [et al.] // Phys. Rev. B. - 2002. - Vol. 65, Is. 11. - Ст. 115302, DOI 10.1103/PhysRevB.65.115302. - Cited References: 22 . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
ELECTRIC-FIELD
   STATES
   LADDERS
   BREAKDOWN
   BLOCH
   LOCALIZATION
Аннотация: Wannier-Stark states for semiconductor superlattices in strong static fields, where the interband Landau-Zener tunneling cannot be neglected, are rigorously calculated. The lifetime of these metastable states was found to show multiscale oscillations as a function of the static field, which is explained by an interaction with above-barrier resonances. An equation, expressing the absorption spectrum of semiconductor superlattices in terms of the resonance Wannier-Stark states, is obtained and used to calculate the absorption spectrum in the region of high static fields.

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Держатели документа:
Univ Kaiserslautern, Fachbereich Phys, D-67653 Kaiserslautern, Germany
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Gluck, M.; Kolovsky, A. R.; Коловский, Андрей Радиевич; Korsch, H. J.; Zimmer, F.
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Fractional and unquantized dc voltage generation in THz-driven semiconductor superlattices / K. N. Alekseev [et al.] // Europhys. Lett. - 2001. - Vol. 56, Is. 6. - P. 842-848, DOI 10.1209/epl/i2001-00596-9. - Cited References: 40 . - ISSN 0295-5075

РУБ Physics, Multidisciplinary
Рубрики:
BLOCH OSCILLATIONS
   SYMMETRY-BREAKING
   ELECTRIC-FIELD
   FREQUENCY
   TRANSPORT
   CHAOS
   RESONANCES
   RADIATION
Аннотация: We consider the spontaneous creation of a dc voltage across a strongly coupled semiconductor superlattice subjected to THz radiation. We show that the dc voltage may be approximately proportional either to an integer or to a half-integer multiple of the frequency of the applied ac field, depending on the ratio of the characteristic scattering rates of conducting electrons. For the case of an ac field frequency less than the characteristic scattering rates, we demonstrate the generation of an unquantized dc voltage.

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Держатели документа:
Univ Oulu, Dept Phys Sci, Div Theoret Phys, FIN-90014 Oulu, Finland
LV Kirenskii Inst Phys, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Univ Notre Dame, Dept Elect Engn, Notre Dame, IN 46556 USA
Univ Loughborough, Dept Phys, Loughborough LE11 3TU, Leics, England
Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
Boston Univ, Dept Phys, Boston, MA 02215 USA
ИФ СО РАН
Theor. of Nonlinear Processes Lab., Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States
Department of Physics, Loughborough University, Loughborough, LE11 3TU, United Kingdom
Depts. of Elec. and Comp. E., Boston University, Boston, MA 02215, United States

Доп.точки доступа:
Alekseev, K. N.; Cannon, E. H.; Kusmartsev, F. V.; Campbell, D. K.
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Spontaneous dc current generation in a resistively shunted semiconductor superlattice driven by a terahertz field / K. N. Alekseev [et al.] // Phys. Rev. Lett. - 1998. - Vol. 80, Is. 12. - P. 2669-2672, DOI 10.1103/PhysRevLett.80.2669. - Cited References: 21 . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
DYNAMIC LOCALIZATION
   BLOCH OSCILLATIONS
   ELECTRIC-FIELD
   THZ-FIELD
   PENDULUM
   CHAOS
   TIME
   SUPPRESSION
   SYSTEMS
Аннотация: We study a resistively shunted semiconductor superlattice subject to a high-frequency electric field. Using a balance equation approach that incorporates the influence of the electric circuit, we determine numerically a range of amplitude and frequency of the ac field for which a de bias and current are generated spontaneously and show that this region is likely accessible to current experiments. Our simulations reveal that the Bloch frequency corresponding to the spontaneous de bias is approximately an integer multiple of the ac field frequency.

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Держатели документа:
Univ Illinois, Dept Phys, Urbana, IL 61801 USA
NORDITA, DK-2100 Copenhagen O, Denmark
LV Kirensky Phys Inst, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Loughborough Univ Technol, Dept Phys, Loughborough LE11 3TU, Leics, England
ИФ СО РАН

Доп.точки доступа:
Alekseev, K. N.; Cannon, E. H.; McKinney, J. C.; Kusmartsev, F. V.; Campbell, D. K.
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Director configurations in nematic droplets with tilted surface anchoring / M. N. Krakhalev [et al.] // Liq. Cryst. - 2017. - Vol. 44, Is. 2. - P. 355-363, DOI 10.1080/02678292.2016.1205225. - Cited References:32. - This work was supported by Russian Foundation for Basic Research (RFBR) under Grants 15-02-06924 and 16-32-00164 and Siberian Branch of the Russian Academy of Sciences (SB RAS) under Complex Program [II.2P 0358-2015-0010], and V.S.S. acknowledges financial support from RFBR [16-32-60036]. . - ISSN 0267-8292. - ISSN 1366-5855

РУБ Chemistry, Multidisciplinary + Crystallography + Materials Science, Multidisciplinary
Рубрики:
DISPERSED LIQUID-CRYSTALS
   RIGIDLY FIXED POLES
   ELECTRIC-FIELD
   POLYMER
Кл.слова (ненормированные):
Polymer dispersed liquid crystal -- nematic droplet -- director -- configuration -- boundary conditions -- surface anchoring strength -- optical -- texture
Аннотация: The polymer dispersed nematic liquid crystal (LC) with the tilted surface anchoring has been studied. The droplet orientational structures with two point surface defects – boojums and the surface ring defect – are formed within the films. The director tilt angle α = 40° ± 4° at the droplet interface and LC surface anchoring strength Ws ~ 10–6 (J m−2) have been estimated. The bipolar axes within the studied droplets of oblate ellipsoidal form can be randomly oriented are oriented randomly relatively to the ellipsoid axes as opposed to the droplets with homeotropic and tangential anchoring.

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

Доп.точки доступа:
Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Russian Foundation for Basic Research (RFBR) [15-02-06924, 16-32-00164]; Siberian Branch of the Russian Academy of Sciences (SB RAS) [II.2P 0358-2015-0010]; RFBR [16-32-60036]
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10.

    Optical textures and orientational structures of nematic and cholesteric droplets with heterogeneous boundary conditions / O. O. Prishchepa [et al.] // Mol. Cryst. Liquid Cryst. - 2008. - Vol. 489, Is. 1. - P. 84-93, DOI 10.1080/15421400802219817. - Cited Reference Count: 17. - Гранты: This work was supported in part by the grants of DSP, No 2.1.1.1814; RFBR, No 0803-01007; Council of the President of the RF for Support of Young Scientists and Leading Scientific Schools (projects NSh-3818-2008.3, MK-3624.2007.2); RAS, No 8.1, 2.10.2; SB RAS, No 33. - Финансирующая организация: DSP [2.1.1.1814]; RFBR [0803-01007]; Young Scientists and Leading Scientific Schools [NSh-3818-2008.3, MK-3624.2007.2]; RAS [8.1, 2.10.2]; SB RAS [33] . - ISSN 1542-1406
Рубрики:
LIQUID-CRYSTAL DROPLETS
   ELECTRIC-FIELD
   BIPOLAR
Кл.слова (ненормированные):
director configuration -- interfaces -- nematic and cholesteric droplets -- surfactant -- Director configuration -- Interfaces -- Nematic and cholesteric droplets -- Surfactant -- Boundary value problems -- Drop formation -- Drops -- Fluid mechanics -- Phospholipids -- Surface active agents -- Boundary conditioning -- Director configuration -- Homeotropic -- Interfaces -- Nematic and cholesteric droplets -- Nematic droplets -- Nematics -- Optical textures -- Orientational structures -- Surface anchoring -- Surfactant -- Boundary conditions
Аннотация: Brief review of the orientational structures within the droplets of chiral as well as achiral nematics with the heterogeneous boundary conditions is reported. The modification of boundary conditions in the 5CB/polyvinylbutyral and LN-396/cholesterylacetate/polyvinylbutyral compositions with the planar anchoring at the interface is created by addition of the homeotropic surfactant (lecithin). Sequences of the novel stable and non-stable orientational structures being realized within the droplets of achiral nematic are presented. For the LN-396 nematic droplets doped by cholesterylacetate the formation of a spherulite structure has been shown when the tangential surface anchoring is modified to the homeotropic one.

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Держатели документа:
Siberian Fed Univ Krasnoyarsk, Krasnoyarsk Sci Ctr, SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
L.V. Kirensky Institut of physics

Доп.точки доступа:
Prishchepa, O. O.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Gardymova, A. P.; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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