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1.
Aver'yanov, E. M.
Long-Range Orientational Order, Local-Field Anisotropy, and Mean Molecular Polarizability in Liquid Crystals / E. M. Aver'yanov> // J. Exp. Theor. Phys. - 2009. -
Vol. 108
,
Is. 1
. - P. 176-186,
DOI
10.1134/S106377610901021X. - Cited References: 35 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
REFRACTIVE-INDEXES
OPTICAL ANISOTROPY
Кл.слова (ненормированные):
Anisotropy
--
Crystal
symmetry
--
Crystals
--
Electric fields
--
Light sources
--
Liquid crystals
--
Liquids
--
Molecules
--
Tensors
--
Biaxial liquid crystals
--
Calamitic
--
Discotic
--
Discotic liquid crystals
--
Experimental datum
--
Field models
--
Lorentz
--
Mesoscopic
--
Molecular polarizability
--
Orientational orders
--
Phase state
--
Nematic liquid crystals
Аннотация:
The problems on the relation of the mean effective molecular polarizability (gamma) over bar to the long-range orientational order of molecules (the optical anisotropy of the medium) in uniaxial and biaxial liquid crystals, the local anisotropy on mesoscopic scales, and the anisotropy of the Lorentz tensor L and the local-field tensor f are formulated and solved. It is demonstrated that the presence of the long-range orientational order of molecules in liquid crystals imposes limitations from below on the molecular polarizability (gamma) over bar, which differs for uniaxial and biaxial liquid crystals. The relation between the local anisotropy and the molecular polarizability (gamma) over bar is investigated for calamitic and discotic uniaxial liquid crystals consisting of lath- and disk-shaped molecules. These liquid crystals with identical macroscopic
symmetry
differ in the local anisotropy and the relationships between the components L(parallel to)
L(perpendicular to,) f(parallel to) > f(perpendicular to) (discotic) for an electric field oriented parallel and perpendicular to the director. The limitations from below and above on the molecular polarizability (gamma) over bar due to the anisotropy of the tensors L and f are established for liquid crystals of both types. These limitations indicate that the molecular polarizability (gamma) over bar depends on the phase state and the temperature. The factors responsible for the nonphysical consequences of the local-field models based on the approximation (gamma) over bar = const are revealed. The theoretical inferences are confirmed by the experimental data for a number of calamitic nematic liquid crystals with different values of birefringence and the discotic liquid crystal Col(ho).
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аверьянов, Евгений Михайлович
}
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2.
Ovchinnikov, S. G.
Comparison of electronic structure, magnetic mechanism, and
symmetry
of pairing in ruthenates and cuprates / S. G. Ovchinnikov ; ed. C Noce [et al.]> // Ruthenate and rutheno-cuprate materials: unconventional superconductivity, magnetism and quantum phase transitions. Ser. lecture notes in physics : Springer Verlag, 2002. -
Vol. 603
: International Conference on Ruthenate and Rutheno-Cuprate Materials (OCT 25-27, 2001, VIETRI SUL MARE, ITALY). - P. 239-255. - Cited References: 48 . - ISBN 0075-8450. - ISBN 3-540-44275-8
РУБ
Physics, Multidisciplinary + Physics, Condensed Matter
Рубрики:
METAL-INSULATOR-TRANSITION
SUPERCONDUCTOR SR2RUO4
LAYERED PEROVSKITE
BAND-STRUCTURE
CORRELATED ELECTRONS
MOTT TRANSITION
COPPER OXIDES
HUBBARD-MODEL
RUSR2GDCU2O8
CA2-XSRXRUO4
Аннотация:
A generalized tight-binding (GTB) method is developed to calculate quasi-particle band structure with explicit account for strong electronic correlations. The GTB method combines exact diagonalization of the multi-orbital P-d model Hamiltonian within the unit cell and the perturbation theory in the Hubbard X-operators form for the inter-cell hopping and interactions. For undoped cuprates we obtain the valence band structure in excellent agreement with ARPES data, evolution of the band structure with doping with an in-gap state at small doping, impurity-like band at higher doping to optimally doped metal. The effective low-energy Hamiltonian has the form of singlet-triplet t-J model. For ruthenates the t-J-I model is proposed with both antiferromagnetic J and ferromagnetic I couplings. In the strong correlation limit, the mean-field theory of superconductivity results in d-wave singlet pairing mediated by J (cuprates) and p-wave triplet one mediated by I (ruthenates) with ratio T-c((d))/T-c((p)) similar to 100 due to the different
symmetry
of the gap. The competition of ferromagnetic and antiferromagnetic order in rutheno-cuprates is also discussed.
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Держатели документа:
RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Доп.точки доступа:
Noce, C \ed.\; Vecchione, A \ed.\; Cuoco, M \ed.\; Cuoco, \ed.\; Овчинников, Сергей Геннадьевич
}
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3.
Gavrichkov, V. A.
Electronic structure and order parameter
symmetry
in high-temperature superconductors / V. A. Gavrichkov, E. V. Kuz'min, S. G. Ovchinnikov> // Uspekhi Fiz. Nauk. - 2000. -
Vol. 170
,
Is. 2
. - P. 189-192. - Cited References: 31 . - ISSN 0042-1294
РУБ
Physics, Multidisciplinary
Рубрики:
CORRELATED ELECTRONS
HUBBARD-MODEL
OXIDES
LA2-XSRXCUO4
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk, Russia
ИФ СО РАН
Доп.точки доступа:
Kuz'min, E. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Гавричков, Владимир Александрович
}
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4.
Violation of axial
symmetry
of optical properties in the trigonal crystal Nd:GdFe2.1Ga0.9(BO3)(4) / A. V. Malakhovskii [et al.]> // Phys. Lett. A. - 2009. -
Vol. 373
,
Is. 18-19
. - P. 1683-1686,
DOI
10.1016/j.physleta.2009.03.019. - Cited References: 16. - The work was supported by the Russian Foundation for Basic Researches, grant No 07-02-00704. . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
IRON BORATE GDFE3(BO3)(4)
Кл.слова (ненормированные):
Optical anisotropy
--
Spectroscopy
--
Rare earth compounds
--
Transition metal compounds
--
Optical anisotropy
--
Rare earth compounds
--
Spectroscopy
--
Transition metal compounds
Аннотация:
Strong dependence of birefringence and absorption spectra of d-d, f-f and charge transfer transitions on the direction of light beam in the plane perpendicular to the threefold crystallographic axis has been found out in trigonal crystal Nd:GdFe2.1Ga0.9(BO3)(4). X-ray measurements have shown that the crystal consists of inversion twins, whose formation is stimulated by the partial substitution of Fe by Ga. Observed violation of axial
symmetry
of the trigonal crystal optical properties is accounted for on the basis of assumption about stripe domain structure of the inversion twins. (c) 2009 Elsevier B.V. All rights reserved.
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Держатели документа:
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Zabluda, V. N.; Заблуда, Владимир Николаевич; Leont'ev, A. A.; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Researches [07-02-00704]
}
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5.
Magnetic properties of
MnGeO3 single crystals with orthorhombic structure / A. D. Balaev [et al.]> // J. Phys.: Condens. Matter. - 2009. -
Vol. 21
,
Is. 33
. - Ст. 336006,
DOI
10.1088/0953-8984/21/33/336006. - Cited References: 10 . - ISSN 0953-8984
РУБ
Physics, Condensed Matter
Кл.слова (ненормированные):
Anisotropy field
--
Magnetic measurements
--
Orthorhombic structures
--
Orthorhombic
symmetry
--
Spin-flop transitions
--
Two-sublattice models
--
Crystal
symmetry
--
Crystallography
--
Magnetic fields
--
Magnetic properties
--
Magnetic structure
--
Single crystals
Аннотация:
The current report is devoted to the further study of magnetic properties of MnGeO3 single crystals with orthorhombic
symmetry
Pbca. New data from magnetic measurements in magnetic fields up to 80 kOe are presented. A spin flop transition is observed at H-sf = 35 kOe and T = 4.2 K along the a-axis. The exchange and anisotropy fields are determined. The magnetic structure of MnGeO3 with T-N approximate to 36 K is qualitatively described using a two-sublattice model.
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Держатели документа:
[Balaev, A. D.
Volkov, N. V.
Sapronova, N. V.
Sablina, K. A.
Vasilyev, A. D.] SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Volkov, N. V.
Vasilyev, A. D.] Siberian Fed Univ, Dept Phys, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirensky Institute of Physics SB RAS, 660036 Krasnoyarsk, Russian Federation
Department of Physics, Siberian Federal University, 660041 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Balaev, A. D.; Балаев, Александр Дмитриевич; Volkov, N. V.; Волков, Никита Валентинович; Sapronova, N. V.; Sablina, K. A.; Саблина, Клара Александровна; Vasilyev, A. D.
}
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6.
Chubukov, A. V.
Theory of Raman response of a superconductor with extended s-wave
symmetry
: Application to the iron pnictides / A. V. Chubukov, I. . Eremin, M. M. Korshunov> // Phys. Rev. B. - 2009. -
Vol. 79
,
Is. 22
. - Ст. 220501,
DOI
10.1103/PhysRevB.79.220501. - Cited References: 48. - We acknowledge useful conversations with G. Blumberg, W. Brenig, H.-Y. Choi, D. V. Efremov, A. Sacuto, M. Vavilov, and A. Vorontsov. A. V. C. acknowledges support from NSF (Contract No. NSF-DMR 0604406). I. E. acknowledges partial support from the Asian-Pacific Center for Theoretical Physics, the Volkswagen Foundation (Contract No. I/82203), and the RMHE Program "Development of scientific potential" (Contract No. N1 2.1.1/298.5). M. M. K. acknowledges support from RFBR (Grant No. 09-02-00127) and RAS program on "Low temperature quantum phenomena." . - ISSN 1098-0121
РУБ
Physics, Condensed Matter
Рубрики:
LAYERED SUPERCONDUCTOR
SCATTERING
BA0.6K0.4FE2AS2
Аннотация:
We argue that Raman study of Fe-pnictides is a way to unambiguously distinguish between various superconducting gaps proposed for these materials. We show that A(1g) Raman intensity develops a true resonance peak below 2 Delta if the pairing gap has A(1g)
symmetry
in the folded Brillouin zone (Delta(k=0)=Delta, Delta(pi, pi)=-Delta). No such peak develops for a pure s-wave gap, a d-wave gap, and an extended s-wave gap with Delta(k) =Delta cosk(x)/2cosk(y)/2. We show that the peak remains quite strong for the values of interpocket impurity scattering used to fit NMR data.
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Держатели документа:
[Chubukov, Andrey V.] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[Eremin, Ilya
Korshunov, Maxim M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Eremin, Ilya] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Korshunov, Maxim M.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, United States
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, D-38106 Braunschweig, Germany
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russian Federation
Physics Department, Kazan State University, 420008 Kazan, Russian Federation
Доп.точки доступа:
Eremin, I.; Korshunov, M. M.; Коршунов, Максим Михайлович; NSF [DMR 0604406]; Asian-Pacific Center for Theoretical Physics; Volkswagen Foundation [I/82203]; RMHE Program "Development of scientific potential" [N1 2.1.1/298.5]; RFBR [09-02-00127]
}
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7.
Breaking of the
Selection Rules for Optical Transitions in the Dielectric PrFe3(BO3)(4) Crystal by a Praseodymium-Iron Exchange Interaction / M. N. Popova [et al.]> // Phys. Rev. Lett. - 2009. -
Vol. 102
,
Is. 18
. - Ст. 187403,
DOI
10.1103/PhysRevLett.102.187403. - Cited References: 26. - This work was supported in part by the RFBR under Grants No. 07-02-01185 and No. 07-02-00704 and by the Russian Academy of Sciences under the Programs for Basic Research. . - ISSN 0031-9007
РУБ
Physics, Multidisciplinary
Рубрики:
SINGLE-CRYSTAL
GDFE3(BO3)(4)
PHASE
DYFE3(BO3)(4)
SPECTRUM
LINES
Кл.слова (ненормированные):
Magnetic ordering temperatures
--
Optical spectrum
--
Order parameters
--
Point symmetries
--
Selection rules
--
Exchange interactions
--
Neon
--
Praseodymium
--
Single crystals
--
Crystal
symmetry
Аннотация:
We report on the emergence of new lines in the optical spectrum of the PrFe3(BO3)(4) single crystal at the magnetic ordering temperature. The transitions between singlet crystal-field sublevels of Pr3+ ion with the same transformational properties, strictly forbidden for the trigonal D-3 point
symmetry
of this ion in PrFe3(BO3)(4), appear below the Neel temperature and grow in intensity as a square of the order parameter. We show that the phenomenon originates from the mixing of wave functions of different Pr3+ sublevels by the Pr-Fe exchange interaction.
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Держатели документа:
[Popova, M. N.
Stanislavchuk, T. N.] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
[Malkin, B. Z.] Kazan VI Lenin State Univ, Kazan 420008, Russia
[Bezmaternykh, L. N.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Institute of Spectroscopy, Russian Academy of Sciences, 142190 Troitsk, Moscow region, Russian Federation
Kazan State University, 420008 Kazan, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch, RAS, 660036 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Popova, M. N.; Stanislavchuk, T. N.; Malkin, B. Z.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; RFBR [07-02-01185, 07-02-00704]; Russian Academy of Sciences
}
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8.
Lattice and magnetic
dynamics of a quasi-one-dimensional chain antiferromagnet PbFeBO4 / M. A. Prosnikov [et al.]> // J. Phys.: Condens. Matter. - 2017. -
Vol. 29
,
Is. 2
. - Ст. 025808,
DOI
10.1088/0953-8984/29/2/025808. - Cited References:32. - This research was supported by the Russian Science Foundation, grant No. 16-12-10456. . - ISSN 0953-8984. - ISSN 1361-648X
РУБ
Physics, Condensed Matter
Рубрики:
LIGHT-SCATTERING
DIELECTRIC-PROPERTIES
RAMAN-SPECTROSCOPY
Кл.слова (ненормированные):
Raman scattering
--
spin and phonon excitations
--
spin-phonon interaction
--
antiferromagnetism
--
magnetic
symmetry
analysis
--
two-magnon scattering
Аннотация:
A group of recently synthesized orthorhombic Pnma crystals PbMBO4 (M = Cr, Mn, Fe) demonstrates a number of unusual structural and magnetic properties. We report on polarized Raman scattering study of the lattice and magnetic dynamics in single crystals of an antiferromagnet PbFeBO4 below and above T-N = 114 K. Polarization properties of the observed magnetic excitations below T-N as well as intense quasi-elastic scattering support the quasi-one-dimensional character of the magnetic structure of PbFeBO4. Frequency overlapping of magnetic excitations and low-frequency phonons in the range of 90-200 cm-1 leads to pronounced asymmetric anomalies thus confirming intrinsic coupling of magnetic and lattice subsystems. This conclusion is also supported by observation of anomalous temperature behaviour of higher frequency phonons in the vicinity of T-N. Experimental investigations are supported by relevant magnetic
symmetry
analysis which allows us to explain previously observed anomalous results.
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Держатели документа:
Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia.
SB Russian Acad Sci, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Prosnikov, M. A.; Smirnov, A. N.; Davydov, V. Yu; Sablina, K. A.; Саблина, Клара Александровна; Pisarev, R. V.; Russian Science Foundation [16-12-10456]
}
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9.
Timofeev, I. V.
Chiral optical Tamm states at the boundary of the medium with helical
symmetry
of the dielectric tensor / I. V. Timofeev, S. Y. Vetrov> // JETP Letters. - 2016. -
Vol. 104
,
Is. 6
. - P. 380-383,
DOI
10.1134/S0021364016180119. - Cited References: 7. - This work was performed within the framework of the state assignment from the Ministry of Education and Science of the Russian Federation for R&D at the Siberian Federal University (assignment no. 3.1276.2014/K). . - ISSN 0021-3640
Аннотация:
A new optical state at the boundary of a chiral medium whose dielectric tensor has a helical
symmetry
is described analytically and numerically. The case of zero tangential wavenumber is considered. The state localized near the boundary does not transfer energy along this boundary and decreases exponentially with the distance from the boundary. The penetration of the field into the chiral medium is blocked at wavelengths corresponding to the photonic band gap and close to the pitch of the helix. The polarization of light near the boundary has the same sign of chirality as the helical
symmetry
. It is shown that the homogeneous environment or a substrate should exhibit anisotropic metallic reflection. The spectral manifestation of the state is determined by the angle between the optical axes of the media at the interface. A state at the interface between a cholesteric liquid crystal and an anisotropic metal–dielectric nanocomposite was considered as an example. © 2016, Pleiades Publishing, Inc.
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Публикация на русском языке
Тимофеев, Иван Владимирович. Хиральные оптические таммовские состояния на границе среды с винтовой симметрией тензора диэлектрической проницаемости [Текст] / И. В. Тимофеев, С. Я. Ветров // Письма в Журн. эксперим. и теор. физ. : Наука, 2016. - Т. 104 Вып. 5-6. - С. 393-397
Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Laboratory of Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Тимофеев, Иван Владимирович
}
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10.
Small-angle light scattering
symmetry
breaking in polymer-dispersed liquid crystal films with inhomogeneous electrically controlled interface anchoring / V. A. Loiko [et al.]> // J. Exp. Theor. Phys. - 2017. -
Vol. 124
,
Is. 3
. - P. 388-405,
DOI
10.1134/S1063776117020133. - Cited References:57. - This work was performed under the interacademic integration project between the National Academy of Sciences of Belarus and the Siberian Branch of the Russian Academy of Sciences and supported by the Belarus Republic Foundation for Fundamental Research (project no. F15SO-039). One of the authors (V.Ya.Z.) thanks the Russian Foundation for Basic Research and the Administration of the Krasnoyarsk Territory (project no. 16-42-240704). . - ISSN 1063-7761. - ISSN 1090-6509
РУБ
Physics, Multidisciplinary
Рубрики:
NEMATIC DROPLETS
BOUNDARY-CONDITIONS
IONIC MODIFICATION
ANGULAR
Аннотация:
We have described the method of analyzing and reporting on the results of calculation of the small-angle structure of radiation scattered by a polymer-dispersed liquid crystal film with electrically controlled interfacial anchoring. The method is based on the interference approximation of the wave scattering theory and the hard disk model. Scattering from an individual liquid crystal droplet has been described using the anomalous diffraction approximation extended to the case of droplets with uniform and nonuniform interface anchoring at the droplet–polymer boundary. The director field structure in an individual droplet is determined from the solution of the problem of minimizing the volume density of the free energy. The electrooptical effect of
symmetry
breaking in the angular distribution of scattered radiation has been analyzed. This effect means that the intensities of radiation scattered within angles +θs and–θs relative to the direction of illumination in the scattering plane can be different. The effect is of the interference origin and is associated with asymmetry of the phase shift of the wavefront of an incident wave from individual parts of the droplet, which appears due to asymmetry of the director field structure in the droplet, caused by nonuniform anchoring of liquid crystal molecules with the polymer on its surface. This effect is analyzed in the case of normal illumination of the film depending on the interfacial anchoring at the liquid crystal–polymer interface, the orientation of the optical axes of droplets, their concentration, sizes, anisometry, and polydispersity.
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Публикация на русском языке
Держатели документа:
Natl Acad Sci Belarus, Stepanov Inst Phys, Minsk 220072, Byelarus.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Fed Res Ctr,Krasnoyarsk Sci Ctr, Kraskoyarsk 660036, Russia.
Доп.точки доступа:
Loiko, V. A.; Konkolovich, A. V.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич; Miskevich, A. A.
}
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11.
Korshunov, M. M.
Spin-resonance peak in inelastic neutron scattering as a probe of gap
symmetry
in Fe-based superconductors / M. M. Korshunov, S. V. Nikolaev, Yu. N. Togushova> //
Int. Conf. "Spectroscopies in Novel Superconductors (SNS-2016) : book of abstracts. - 2016. - P. 54. - We acknowledge partial support by RFBR (Grant RFBR 16-02-00098)
Доп.точки доступа:
Togushova, Yu. N.; Тогушова, Ю. Н.; Shestakov, V. A.; Коршунов, Максим Михайлович; "Spectroscopies in Novel Superconductors", International Conference(2016 ; Jun. 19-24 ; Stuttgart/Ludwigsburg, Germany)
}
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12.
Berman, G. P.
Stochastic-instability of classical homogeneous SU(2) by U(1) fields with spontaneously broken
symmetry
/ G. P. Berman, Y. I. Mankov, A. F. Sadreev> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1985. -
Vol. 88
,
Is. 3
. - P. 705-714. - Cited References: 19 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
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Доп.точки доступа:
Mankov, Y. I.; Маньков, Юрий Иннокентьевич; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Берман, Геннадий Петрович
}
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13.
Val'kov, V. V.
Anomalies in the characteristics of electronic structure upon a quantum phase transition to a state with two order parameters and the breaking of time-reversal
symmetry
/ V. V. Val’kov, A. O. Zlotnikov> // Bull. Russ. Acad. Sci. Phys. - 2016. -
Vol. 80
,
Is. 6
. - P. 616-619,
DOI
10.3103/S106287381606040X. - Cited References: 9 . - ISSN 1062-8738
Кл.слова (ненормированные):
Antiferromagnetism
--
Electronic structure
--
Phase transitions
--
Temperature distribution
--
Antiferromagnetic order parameter
--
Density of state
--
Landau expansion
--
Periodic Anderson model
--
Quantum phase transitions
--
Temperature dependence
--
Time reversal symmetries
--
Two order parameters
--
Quantum theory
Аннотация:
Based on the periodic Anderson model, microscopic expressions for the Ginzburg–Landau expansion coefficients in a phase with superconducting and antiferromagnetic order parameters are obtained. Temperature dependences of the order parameters near the temperature of the transition to this phase are established. The emergence of anomalous properties upon the quantum phase transition to the phase with two order parameters is investigated. This transition is accompanied by drastic reconstruction of the density of states, reflected by the interplay between superconductivity and antiferromagnetism. © 2016, Allerton Press, Inc.
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Публикация на русском языке
Вальков, Валерий Владимирович. Аномалии характеристик электронной структуры при квантовом фазовом переходе в состояние с двумя параметрами порядка и нарушенной симметрией относительно инверсии времени [Текст] / В. В. Вальков, А. О. Злотников // Изв. РАН. Сер. физ. - 2016. - Т. 80 № 6. - С. 683-686
Доп.точки доступа:
Zlotnikov, A. O.; Злотников, Антон Олегович; Вальков, Валерий Владимирович
}
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14.
Korshunov, M. M.
Spin-resonance peak in iron-based superconductors as a probe of gap
symmetry
/ M. M. Korshunov, V. A. Shestakov, Yu. N. Togushova> //
VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. I2.10. - P. 131. - References: 8. - We acknowledge partial support by RFBR (Grant RFBR 16-02-00098) . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
iron-based superconductors
--
spin fluctuation pairing
--
spin-resonance peak
--
impurities
Доп.точки доступа:
Shestakov, V. A.; Togushova, Yu. N.; Тогушова, Ю. Н.; Коршунов, Максим Михайлович; 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
Нет сведений об экземплярах
}
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15.
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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16.
Korshunov, M. M.
The effective Hamiltonian of the singlet-triplet model for copper oxides / M. M. Korshunov, S. G. Ovchinnikov> // Phys. Solid State. - 2001. -
Vol. 43
,
Is. 3
. - P. 416-419,
DOI
10.1134/1.1356113. - Cited References: 15 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
HIGH-TC SUPERCONDUCTORS
BAND-STRUCTURE
LA2-XSRXCUO4
MECHANISM
SYMMETRY
SPECTRUM
Аннотация:
The effective Hamiltonian for a realistic multiband p-d model is developed. In the case of electron doping, the Hamiltonian coincides with that for the standard t-J model. For hole doping, the singlet-triplet t-J model takes place. (C) 2001 MAIK "Nauka/Interperiodica".
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Держатели документа:
Krasnoyarsk State Univ, Krasnoyarsk 660062, Russia
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Krasnoyarsk State University, Krasnoyarsk, 660062, Russian Federation
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Коршунов, Максим Михайлович
}
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17.
Polarization-optical and X-ray
diffraction investigations on the
symmetry
of distorted phases of ammonium cryolite (NH4)(3)ScF6 / S. V. Mel'nikova [et al.]> // Phys. Solid State. - 2000. -
Vol. 42
,
Is. 2
. - P. 345-349,
DOI
10.1134/1.1131210. - Cited References: 12 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
TRANSITIONS
Аннотация:
Single-crystal plates of different sections of the (NH4)(3)ScF6 crystal have been investigated by polarization-optical microscopy and X-ray diffraction over a wide temperature range, including the temperatures of two known phase transitions and the third transition found recently. It is established that the
symmetry
of phases changes in the following sequence: O-h(5) - Fm3m (Z = 4) ↔ C-2h(5) - P12(1)/n1 (Z = 2)↔ C-2h(3) -I12/m1 (Z = 16) ↔ C-i(1) - I (l) over bar (Z = 16). (C) 2000 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, Kirenskii Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Agr Univ, Krasnoyarsk 660049, Russia
ИФ СО РАН
Доп.точки доступа:
Mel'nikova, S. V.; Мельникова, Светлана Владимировна; Misyul', S. V.; Мисюль, Сергей Валентинович; Bovina, A. F.; Бовина, Ася Федоровна; Afanas'ev, M. L.
}
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18.
Optical and x-ray
diffraction investigations of the
symmetry
of distorted phases of the (NH4)(2)KGaF6 crystal / S. V. Mel'nikova [et al.]> // Phys. Solid State. - 2002. -
Vol. 44
,
Is. 10
. - P. 1967-1971,
DOI
10.1134/1.1514789. - Cited References: 10 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
THERMODYNAMIC PROPERTIES
TRANSITION
Аннотация:
Powders and single-crystal plates of different sections of an (NH4)(2)KGaF6 crystal are investigated using polarized light microscopy and x-ray diffraction over a wide temperature range, including the phase transition temperatures. It is established that the sequence of
symmetry
changes in the crystal under investigation is as follows: O-h(5)-Fm3m (Z = 4) ↔ C-4h(5)-I114/m (Z = 2) ↔ C-2h(5)-P112(1)/n (Z = 2). (C) 2002 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Krasnoyarsk State Agr Univ, Krasnoyarsk 660049, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Mel'nikova, S. V.; Мельникова, Светлана Владимировна; Misyul', S. V.; Мисюль, Сергей Валентинович; Bovina, A. F.; Бовина, Ася Федоровна; Afanas'ev, M. L.
}
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19.
Low-temperature specific heat
of the Rb2KScF6 elpasolite / I. N. Flerov [et al.]> // Phys. Solid State. - 2003. -
Vol. 45
,
Is. 1
. - P. 167-170,
DOI
10.1134/1.1537430. - Cited References: 9 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
CRYOLITE (NH4)(3)SCF6
DISTORTED PHASES
SYMMETRY
Аннотация:
The specific heat of single-crystal Rb2KScF6 is measured using ac calorimetry in the range 4-280 K. The results are discussed in the context of a group-theoretical analysis of possible distortions of the elpasolite structure and of experimental data obtained earlier with an adiabatic calorimeter in a narrower temperature region. (C) 2003 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Zaragoza, CSIC, Inst Sci Mat Aragon, E-50009 Zaragoza, Spain
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Inst. de Sciencia de Mat. de Aragon, CSIC, Universidad de Zaragoza, Zaragoza 50009, Spain
Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Burriel, R.; Gorev, M. V.; Горев, Михаил Васильевич; Isla, P.; Voronov, V. N.; Воронов, Владимир Николаевич
}
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20.
Bulgakov, E. N.
Rectangular microwave resonators with magnetic anisotropy. Mapping onto pseudointegrable rhombus / E. N. Bulgakov, A. F. Sadreev> // Europhys. Lett. - 2002. -
Vol. 57
,
Is. 2
. - P. 198-204,
DOI
10.1209/epl/i2002-00561-8. - Cited References: 24 . - ISSN 0295-5075
РУБ
Physics, Multidisciplinary
Рубрики:
TIME-REVERSAL
SYMMETRY
SPECTRAL STATISTICS
STADIUM BILLIARD
EIGENFUNCTIONS
SYSTEMS
CHAOS
Аннотация:
A rectangular microwave resonator filled with ferrite with uniaxial magnetic anisotropy is considered. It is shown that this task can be reduced to an empty rhombus resonator with the vertex angle defined by an external magnetic field, provided that the magnetic anisotropy of the ferrite is strong. Therefore, the statistics of eigenfrequencies for TM modes is described by the Brody or semi-Poisson distribution with some exceptional cases.
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Держатели документа:
LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden
ИФ СО РАН
Kirensky Institute of Physics-, 660036, Krasnoyarsk, Russian Federation
Department of Physics and Measurement Technology, Linkoping University, S-581 83 Linkoping, Sweden
Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
}
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