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1.
Aplesnin, S. S.
Nonadiabatic interaction of acoustic
phonons
with spins S=1/2 in the two-dimensional Heisenberg model / S. S. Aplesnin> // J. Exp. Theor. Phys. - 2003. -
Vol. 97
,
Is. 5
. - P. 969-977,
DOI
10.1134/1.1633952. - Cited References: 18 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
QUANTUM MONTE-CARLO
EU2CUO4
GD2CUO4
POLARON
Кл.слова (ненормированные):
Antiferromagnetic materials
--
Correlation methods
--
Crystal symmetry
--
Magnetic couplings
--
Magnetic moments
--
Magnetization
--
Monte Carlo methods
--
Quantum theory
--
Acoustic
phonons
--
Nonadiabatic interaction
--
Orthorhombicity
--
Quantum spin liquid transitions
--
Phonons
Аннотация:
The ground state of a two-dimensional antiferromagnet having spins S = 1/2 and interacting with acoustic
phonons
is investigated in the nonadiabatic approximation using the quantum-mechanical Monte Carlo method. The critical parameters of the spin-phonon coupling, corresponding to the formation of bound spin-phonon excitations, crystal symmetry lowering, and the emergence of a gap in the spin excitation spectrum, as well as the antiferromagnet-quantum spin liquid transition, are determined. The orthorhombicity parameter, the sublattice magnetization, the violation of the spherical symmetry of spin-spin correlation functions, and the magnetic moment in Gd2CuO4 and Eu2CuO4 are calculated. (C) 2003 MAIK "Nauka / Interperiodica".
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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgoivdok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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2.
Aplesnin, S. S.
Spinon excitations in 2D uantum spin liquid with S=1/2 interacted with acoustic
phonons
/ S. S. Aplesnin> //
EASTMAG-2004 : abstract book / org. com. K. S. Aleksandrov [et al.]. - Krasnoyarsk, 2004. -
Sect.
: Fundamental magnetic properties. - P. 54. - Cited References: 3
Держатели документа:
Kirensky Institute of Physics
Доп.точки доступа:
Aleksandrov, K. S. \org. com.\; Александров, Кирилл Сергеевич; Аплеснин, Сергей Степанович; Российская академия наук; Научный совет по физике конденсированных сред РАН; Научный совет РАН по физике низких температурСибирское отделение РАН; Красноярский научный центр Сибирского отделения РАН; Институт физики им. Л.В. Киренского Сибирского отделения РАН; Красноярский государственный университет; Красноярский государственный технический университет; Институт физики металлов Уральского отделения РАН; Euro-asian symposium "Trends in magnetism"(2 ; 2004 ; Aug. 24-27 ; Krasnoyarsk); "Trends in magnetism", Euro-Asian Symposium(2 ; 2004 ; Aug. 24-27 ; Krasnoyarsk)
}
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3.
Aplesnin, S. S.
Two-dimensional quantum spin liquid with S=1/2 spins interacting with acoustic
phonons
/ S. S. Aplesnin> // Phys. Lett. A. - 2004. -
Vol. 333
,
Is. 5-6
. - P. 446-449,
DOI
10.1016/j.physleta.2004.10.064. - Cited References: 11 . - ISSN 0375-9601
РУБ
Physics, Multidisciplinary
Рубрики:
ANTIFERROMAGNET
Кл.слова (ненормированные):
spin-phonon interactions
--
spin-liquid
--
spinon excitations
--
Spin-liquid
--
Spin-phonon interactions
--
Spinon excitations
--
ferromagnetic material
--
acceleration
--
acoustics
--
article
--
density
--
energy
--
liquid
--
magnetic field
--
mathematical analysis
--
Monte Carlo method
--
phonon
--
quantum mechanics
Аннотация:
The spin density of states of a two-dimensional antiferromagnet in magnetic field having spins-1/2 and interacting with acoustic
phonons
is investigated in the nonadiabatic approximation using the quantum Monte Carlo method. It is found the gap energy A in the single particle spin excitations spectrum closes at magnetic field Delta similar or equal to H-c, W-ph
W-s, where W-ph and W-s are the bandwidths of phonon and spin excitations in antiferromagnet. (C) 2004 Elsevier B.V All rights reserved.
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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirenskii Institute of Physics, Siberian Br. Russ. Acad. of Sci., Krasnoyarsk 660036, Russia, Russian Federation
Доп.точки доступа:
Аплеснин, Сергей Степанович
}
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4.
Bifurcations of coupled
electron-phonon modes in an antiferromagnet subjected to a magnetic field / K. N. Boldyrev [et al.]> // Phys. Rev. Lett. - 2017. -
Vol. 118
,
Is. 16
. - Ст. 167203,
DOI
10.1103/PhysRevLett.118.167203. - Cited References: 26. - This research was supported by the Russian Scientific Foundation under Grant No. 14-12-01033, the President of Russian Federation (MK-3577.2017.2, K. N. B.), and the U.S. Department of Energy under Grant No. DE-FG02-07ER46382 (experiments at U4-IR beam line NSLS-BNL, T. N. S. and A. A. S.). The National Synchrotron Light Source is operated as a user facility for the U.S. Department of Energy under Contract No. DE-AC02-98CH10886. Part of this work was supported by EMFL (Contract No. 26211). M. N. P. thanks B. Z. Malkin and A. V. Popov for helpful discussions. . - ISSN 0031-9007
Кл.слова (ненормированные):
Antiferromagnetic materials
--
Bifurcation (mathematics)
--
Electron-phonon interactions
--
Electrons
--
Magnetic fields
--
Magnetism
--
Temperature
--
Antiferromagnetic crystals
--
Bifurcation points
--
Electron phonon couplings
--
Electronic excitation
--
External magnetic field
--
Field independents
--
Low temperatures
--
Reflection spectra
--
Phonons
Аннотация:
We report on a new effect caused by the electron-phonon coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registered in the low-temperature far-infrared (terahertz) reflection spectra of an easy-axis antiferromagnet PrFe3(BO3)4 in magnetic fields Bext-c. Both paramagnetic and magnetically ordered phases (including a spin-flop one) were studied in magnetic fields up to 30 T, and two bifurcation points were observed. We show that the field behavior of the coupled modes can be successfully explained and modeled on the basis of the equation derived in the framework of the theory of coupled electron-phonon modes, with the same field-independent electron-phonon interaction constant |W|=14.8 cm-1. © 2017 American Physical Society.
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Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russian Federation
Department of Physics, New Jersey Institute of Technology, Newark, NJ, United States
High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
Kirenskiy Institute of Physics, Siberian Branch of RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Boldyrev, K. N.; Stanislavchuk, T. N.; Sirenko, A. A.; Kamenskyi, D.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Popova, M. N.
}
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5.
Bikbaev, R. G.
Transparent conductive oxides for the epsilon-near-zero Tamm plasmon polaritons / R. G. Bikbaev, S. Ya Vetrov, I. V. Timofeev> // J. Opt. Soc. Am. B. - 2019. -
Vol. 36
,
Is. 10
. - P. 2817-2823,
DOI
10.1364/JOSAB.36.002817. - Cited References: 44. - The reported study was funded by RFBR according to the research project No 18-32-00053 and financial support RFBR and MOST according to the research project No 19-52-52006. . - ISSN 0740-3224
Кл.слова (ненормированные):
Aluminum oxide
--
II-VI semiconductors
--
Indium compounds
--
Infrared devices
--
Optical films
--
Phonons
--
Photons
--
Plasmons
--
Q factor measurement
--
Tin oxides
--
Transfer matrix method
--
Transparent conducting oxides
--
Zinc oxide
Аннотация:
We demonstrate the possibility of using transparent conducting oxides [aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO), indium tin oxide (ITO)] to form Tamm plasmon polaritons in the near-infrared spectral range where the permittivity of oxides is near zero. The spectral properties of the structures are investigated in the framework of the temporal coupled-mode theory and confirmed by the transfer matrix method. It is found that in the critical coupling conditions, the maximal Q-factor of a Tamm plasmon polariton is achieved when a photonic crystal is conjugated with the AZO film, while at the conjugation with the ITO films, the broadest spectral line is obtained. The sensitivity of the wavelength and spectral width of the Tamm plasmon polariton to changes in the oxide film thickness, bulk concentration of a dopant, and angle of incidence is demonstrated.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Бикбаев, Рашид Гельмединович
}
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6.
Coupling of Hubbard
fermions with
phonons
in La2 CuO4: A combined study using density-functional theory and the generalized tight-binding method / E. I. Shneyder [et al.]> // J. Alloys Compd. - 2015. -
Vol. 648
. - P. 258-264,
DOI
10.1016/j.jallcom.2015.05.150. - Cited References: 60. - We acknowledge the stimulating discussions with V.V. Val'kov, D.M. Dzebisashvilly, M.M. Korshunov and I.S. Sandalov. E.I.S. and S.G.O. are thankful to the Russian Science Foundation (project No. 14-12-00061) for the support of the research given in Sections 2, 6 and 7. E.E.K. and I.A.N. are thankful to the State Contract No. 0389-2014-0001 and RFBR grant No. 14-02-00065 for the support of the research given in Section 5. Financial support of the research given in Sections 3 and 4 by the Austrian Federal Government (in particular from Bundesministerium fur Verkehr, Innovation und Technologie and Bundesministerium fur Wissenschaft, Forschung und Wirtschaft) represented by Osterreichische Forschungsforderungsgesellschaft mbH and the Styrian and the Tyrolean Provincial Government, represented by Steirische Wirtschaftsforderungsgesellschaft mbH and Standortagentur Tirol, within the framework of the COMET Funding Programme is gratefully acknowledged by C.D. and J.S. . - ISSN 0925-8388
РУБ
Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
MEAN-FIELD THEORY
LINEAR-RESPONSE THEORY
CUPRATE SUPERCONDUCTORS
ELECTRONIC-STRUCTURE
CORRELATED SYSTEMS
LATTICE-DYNAMICS
BAND-STRUCTURE
LA2CUO4
MODEL
LA2-XSRXCUO4
Кл.слова (ненормированные):
High-temperature superconductivity
--
Electron-phonon coupling
--
Density-functional theory
--
Generalized tight-binding approach
Аннотация:
We present results for the electron-phonon interaction of the Γ-point
phonons
in the tetragonal high-temperature phase of La2 CuO4 obtained from a hybrid scheme, combining density-functional theory (DFT) with the generalized tight-binding approach. As a starting point, eigenfrequencies and eigenvectors for the Γ-point
phonons
are determined from DFT within the frozen phonon approach utilizing the augmented plane wave + local orbitals method. The so obtained characteristics of electron-phonon coupling are converted into parameters of the generalized tight-binding method. This approach is a version of cluster perturbation theory and takes the strong on-site electron correlations into account. The obtained parameters describe the interaction of
phonons
with Hubbard fermions which form quasiparticle bands in strongly correlated electron systems. As a result, it is found that the Γ-point
phonons
with the strongest electron-phonon interaction are the A2u modes (236 cm-1, 131 cm-1 and 476 cm-1). Finally it is shown, that the single-electron spectral-weight redistribution between different Hubbard fermion quasiparticles results in a suppression of electron-phonon interaction which is strongest for the triplet Hubbard band with z oriented copper and oxygen electrons. © 2015 Elsevier B.V. All rights reserved.
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Держатели документа:
Kirensky Institute of Physics SB RAS, Akademgorodok 50, Bld. 38, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation
Materials Center Leoben Forschung GmbH, Rosegger-Stra?e 18, Leoben, Austria
Institute of Electrophysics UB RAS, Amundsena Str. 106, Yekaterinburg, Russian Federation
Physics Department and IRIS Adlershof, Humboldt-Universita¨t zu Berlin, Zum Großen Windkanal 6, Berlin, Germany
Доп.точки доступа:
Shneyder, E. I.; Шнейдер, Елена Игоревна; Spitaler, J.; Kokorina, E. E.; Nekrasov, I. A.; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Draxl, C.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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7.
Electron-Phonon Interaction and
Phonon Renormalization in the Lamellar Cobaltate NaxCoO2 / A. . Donkov [et al.]> // J. Supercond. Nov. Magn. - 2009. -
Vol. 22
: International Conference on Quantum Phenomena in Complex Matters (JUL 26-AUG 01, 2008, Erice, ITALY),
Is. 1
. - P. 37-40,
DOI
10.1007/s10948-008-0372-6. - Cited References: 16 . - ISSN 1557-1939
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
SUPERCONDUCTIVITY
Кл.слова (ненормированные):
Electron-phonon interaction
--
Superconductivity
--
Sodium cobaltate
--
Electron-phonon interaction
--
Sodium cobaltate
--
Superconductivity
--
Brillouin zones
--
Cobaltate
--
Conducting electrons
--
Conduction electrons
--
Doping dependences
--
Feedback effects
--
Matrix elements
--
Phonon frequencies
--
Phonon modes
--
Raman experiments
--
Renormalization
--
Sodium cobaltate
--
Sodium cobaltates
--
Atoms
--
Cobalt compounds
--
Critical current density (superconductivity)
--
Electric conductivity
--
Electron-phonon interactions
--
Electrons
--
Flow interactions
--
Penetration depth (superconductivity)
--
Sodium
--
Superconductivity
--
Phonons
Аннотация:
We study theoretically the electron-phonon interaction in NaxCoO2. For the A(1g) and E-1g phonon modes found in Raman experiments, we calculate the matrix elements of the electron-phonon interaction. Analyzing the feedback effect of the conduction electrons on the phonon frequency., we investigate the doping dependence of these two phonon modes. Due to the momentum dependence of the electron-phonon interaction, we find the strongest renormalization of the E-1g mode around the Brillouin zone boundary which should be observed in the neutron scattering. At the same time, the A(1g) mode shows the strongest coupling to the conducting electrons around the G point and reveals its doping dependence in the Raman experiments. Our results shed light on the possible importance of the electron-phonon interaction in the lamellar sodium cobaltates.
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Держатели документа:
[Donkov, A.
Eremin, I.
Knolle, J.
Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Eremin, I.] TU Braunschweig, Inst Math & Theoret Phys, D-38106 Braunschweig, Germany
[Korshunov, M. M.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, Dresden 01187, Germany
Institute fur Mathematische und Theoretische Physik, TU Braunschweig, Braunschweig 38106, Germany
Siberian Branch, Russian Academy of Sciences, L.V. Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Доп.точки доступа:
Donkov, A.; Eremin, I.; Knolle, J.; Korshunov, M. M.; Коршунов, Максим Михайлович
}
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8.
Engineering localized nonlinear
- optical transport with optical
phonons
/ A. K. Popov [и др.]> //
13th International Conference on TransparenT Optical Network. - 2011. - Ст. 5971107
eLibrary
Доп.точки доступа:
Popov, A.K.; Slabko, V.V.; Shalaev, M.I.; Myslivets, S. A.; Мысливец, Сергей Александрович; International Conference on Transparent Optical Networks(13 ; 2011 ; June ; 26-30 ; Stockholm, Sweden)
}
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9.
Excitation of multiple
phonon modes in copper metaborate CuB2O4 via nonresonant impulsive stimulated Raman scattering / K. Imasaka [et al.]> // Phys. Rev. B. - 2018. -
Vol. 98
,
Is. 5
. - Ст. 054303,
DOI
10.1103/PhysRevB.98.054303. - Cited References: 64. - We thank V. Yu. Davydov for help with the spontaneous Raman scattering experiments. A.M.K. acknowledges support from the Japanese Society for Promotion of Sciences (JSPS) via the Short-Term Fellowship Program for European and North-Americanyoung researchers during her stay at the University of Tokyo. T.S. was supported by JSPS KAKENHI (No. JP15H05454 and No. JP26103004) and JSPS Core-to-Core Program (A. Advanced Research Networks). R.V.P. acknowledges the support from the Russian Science Foundation (Grant No. 16-12-10456). . - ISSN 2469-9950. - ISSN 2469-9969
РУБ
Physics, Condensed Matter
Рубрики:
SPIN-WAVE SPECTRUM
COHERENT
PHONONS
OPTICAL MANIPULATION
Аннотация:
The excitation of four coherent phonon modes of different symmetries is realized in copper metaborate CuB2O4 via impulsive stimulated Raman scattering (ISRS). The
phonons
are detected by monitoring changes in the linear optical birefringence using the polarimetric detection (PD) technique. We compare the results of the ISRS-PD experiment to the polarized spontaneous Raman scattering spectra. We show that agreement between the two sets of data obtained by these allied techniques in a wide phonon frequency range of 4-14 THz can be achieved by taking into account the symmetry of the phonon modes and corresponding excitation and detection selection rules. It is also important to account for the difference between incoherent and coherent
phonons
in terms of their contributions to the Raman scattering process. This comparative analysis highlights the importance of the ratio between the frequency of a particular mode, and the pump and probe spectral widths. We analytically demonstrate that the pump and probe pulse durations of 90 and 50 fs, respectively, used in our experiments limit the highest frequency of the excited and detected coherent phonon modes to 12 THz, and define their relative amplitudes.
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Держатели документа:
Univ Tokyo, Inst Ind Sci, Tokyo 1538505, Japan.
Ioffe Inst, St Petersburg 194021, Russia.
SB RAS, LV Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Kyushu Univ, Dept Phys, Fukuoka, Fukuoka 8190395, Japan.
Доп.точки доступа:
Imasaka, Kotaro; Pisarev, Roman, V; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Shimura, Tsutomu; Kalashnikova, Alexandra M.; Satoh, Takuya; Japanese Society for Promotion of Sciences (JSPS) via the Short-Term Fellowship Program; JSPS KAKENHI [JP15H05454, JP26103004]; JSPS Core-to-Core Program (A. Advanced Research Networks); Russian Science Foundation [16-12-10456]
}
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10.
Heat capacity study
of relaxor PbMg1/3Nb2/3O3 in a wide temperature range / M. V. Gorev [et al.]> // J. Exp. Theor. Phys. - 2003. -
Vol. 96
,
Is. 3
. - P. 531-537,
DOI
10.1134/1.1567427. - Cited References: 21 . - ISSN 1063-7761
РУБ
Physics, Multidisciplinary
Рубрики:
DIFFUSE PHASE-TRANSITION
FERROELECTRICS
Кл.слова (ненормированные):
Differential scanning calorimetry
--
Mathematical models
--
Phonons
--
Random processes
--
Specific heat
--
Spectrum analysis
--
Thermal effects
--
Bond-random field models
--
Wide temperature intervals
--
Lead compounds
Аннотация:
Heat capacity of the PbMg1/3Nb2/3O3 compound is measured using the methods of adiabatic and differential scanning calorimetry in the temperature range 80-750 K. Two blurred anomalies on the C-p(T) dependence are observed in wide temperature intervals of 200- 400 K and 500-700 K. The results of studies are discussed together with data on the structure and phonon spectrum in the framework of spherical random bond-random field model. (C) 2003 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
CNRS, CEMES, F-31055 Toulouse, France
ИФ СО РАН
L. V. Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
CEMES-CNRS, 31055 Toulouse, France
Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Sciau, P.
}
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11.
Ignatchenko, V. A.
Green's functions of polaritons in a medium with zero-mean inhomogeneous coupling parameter / V. A. Ignatchenko, D. S. Polukhin> //
Physics Procedia : Elsevier, 2017. -
Vol. 86
. - P. 117-121,
DOI
10.1016/j.phpro.2017.01.031. - Cited References: 10
Кл.слова (ненормированные):
electromagnetic waves
--
optical
phonons
--
crossing resonance
--
polaritons
--
Green's functions
--
self-consistent approximation
Аннотация:
Dynamic susceptibilities (Green's functions) of the interacting electromagnetic waves G”e(ω) and optical
phonons
G”u(ω) in a medium with zero-mean inhomogeneous coupling parameter have been considered. The calculation was performed using a self-consistent approximation for the two stochastically interacting wave fields. It is shown that on the tops of the resonance maxima of the imaginary parts of the Green functions the fine structure is formed: a minimum (dip) on the top of G”e(ω) and narrow maximum (peak) on the top of G”u(ω). With increasing the correlation wavenumber of inhomogeneities kc (i.e., with decreasing the size of inhomogeneities), the width of the peak on G”u(ω) decreases, and two resonance maxima in the function G”e(ω) are formed. Because of the large difference in the speeds of light and optical
phonons
, the fine structure of the polaritons is manifested itself more clearly and saved to a much larger values of kc, than for the studied earlier crossing resonance of spin and elastic waves.
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Доп.точки доступа:
Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич; International Conference on Photonics of Nano- and Bio-Structures(2015 ; 19-20 June ; Tomsk); International Conference on Photonics of Nano- and Bio-Structures(2015 ; 19-20 June ; Tomsk)
}
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12.
Infrared lattice dynamics
in negative thermal expansion material in single-crystal ScF3 / S. U. Handunkanda, E. B. Curry, V. Voronov, J. N. Hancock> // J. Phys.: Condens. Matter. - 2020. -
Vol. 32
,
Is. 3
. - Ст. 035403,
DOI
10.1088/1361-648X/ab4955. - Cited References: 49. - Work at the University of Connecticut is supported by National Science Foundation Award No. DMR-1506825 . - ISSN 0953-8984. - ISSN 1361-648X
РУБ
Physics, Condensed Matter
Рубрики:
LONGITUDINAL-OPTIC MODES
TEMPERATURE-DEPENDENCE
ABSORPTION
Кл.слова (ненормированные):
phonons
--
infrared reflectivity
--
negative thermal expansion
--
optical properties
Аннотация:
Simple cubic 'open' perovskite ScF3 stands out among trifluoride materials in its large, isotropic negative thermal expansion (NTE), but also its proximity of its zero-temperature state to a structural phase transition. Here we report a temperature- and frequency-dependent lattice dynamical study of Brillouin zone center lattice excitations of single crystals of ScF3 using infrared reflectivity measurements. In addition to quantifying the mode strengths and energies in single crystals of this interesting material, we also find strong evidence for multiphonon absorption processes which excite the zone-edge incipient soft modes associated with NTE and the structural quantum phase transition. In this way, we identify an optically-allowed pathway to excite soft modes provides a means to athermally populate modes associated with NTE in ScF3.
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Держатели документа:
Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk 66006, Russia.
Доп.точки доступа:
Handunkanda, Sahan U.; Curry, Erin B.; Voronov, V. N.; Воронов, Владимир Николаевич; Hancock, Jason N.
}
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13.
Klimin, S. A.
Spin-phonon and electron-phonon interactions in multiferroic GdFe3(BO3)4 and TbFe3(BO3)4 evidenced by IR reflection spectroscopy / S. A. Klimin, M. A. Kashchenko, L. N. Bezmaternykh> // J. Low Temp. Phys. - 2016. -
Vol. 185
,
Is. 5-6
. - P. 538-543,
DOI
10.1007/s10909-016-1597-6. - Cited References:19. - The authors thank Alexey Kuzmenko and Marina Popova for fruitful discussions. This paper was supported by the Russian Science Foundation under Grant No. 14-12-01033, by the Swiss National Science Foundation (SNSF), and by the Science and Technology cooperation program "Switzerland-Russia" of the University of Geneva. . - ISSN 0022-2291. - ISSN 1573-7357
РУБ
Physics, Applied + Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
GdFe3(BO3)4
CRYSTALS
SPECTRUM
Кл.слова (ненормированные):
Multiferroics
--
IR-active
phonons
--
Spin-phonon interaction
--
Coupled
--
electron-phonon mode
Аннотация:
We study temperature-dependent polarized reflection spectra of multiferroic GdFe3(BO3)4 and TbFe3(BO3)4 single crystals. Signatures of spin–lattice interactions in both compounds and of a formation of the electron–phonon coupled mode in TbFe3(BO3)4 are discussed.
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Держатели документа:
Inst Spect RAS, Moscow 108840, Russia.
Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia.
RAS, Siberian Branch, Kirenskiy Inst Phys, Krasnoyarsk 660036, Russia.
Доп.точки доступа:
Kashchenko, M. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Russian Science Foundation [14-12-01033]; Swiss National Science Foundation (SNSF); Science and Technology cooperation program "Switzerland-Russia" of the University of Geneva
}
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14.
Kolbysheva, O. P.
The coupling of solitons via
phonons
in the phi-4-phi-2-model / O. P. Kolbysheva, A. F. Sadreev> // Zhurnal Eksperimentalnoi Teor. Fiz. - 1991. -
Vol. 100
,
Is. 4
. - P. 1262-1271. - Cited References: 9 . - ISSN 0044-4510
РУБ
Physics, Multidisciplinary
Аннотация:
The indirect coupling of solitons via
phonons
in the one-dimensional model phi-4-phi-2, as well as the coupling of plane domain walls in the d-dimensional model are analyzed. Both analytically and numerically, the indirect coupling is shown to be repulsive and significantly more long-range than the static coupling of solitons. The soliton coupling involving the soliton pinning is considered as well.
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Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович
}
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15.
Lattice dynamics and
baric behavior of
phonons
in Hg2Cl2 crystals at high hydrostatic pressures / E. M. Roginskii [et al.]> // Bull. Russ. Acad. Sci. Phys. - 2016. -
Vol. 80
,
Is. 9
. - P. 1033-1037,
DOI
10.3103/S1062873816090409. - Cited References: 12 . - ISSN 1062-8738
Кл.слова (ненормированные):
Chlorine compounds
--
Crystal lattices
--
Density functional theory
--
Hydraulics
--
Hydrostatic pressure
--
Inorganic compounds
--
Density functionals
--
High hydrostatic pressure
--
Intermolecular interactions
--
Orthorhombic phase
--
Phonon spectrum
--
Range dispersion
--
Structural phase transition
--
Theoretical modeling
--
Phonons
Аннотация:
A theoretical model based on long-range dispersion corrections of the charge density functional is proposed for model Hg2Cl2 calomel crystals, typical representatives of molecular inorganic compounds where the intermolecular interaction is found to play an important role. This model successfully describes the electronic state and the phonon spectrum of the above crystal, predicts the earlier unstudied phase transition at high hydrostatic pressure. Study of the baric behavior of the phonon spectrum with Raman spectroscopy observes the soft mode in the low-symmetry orthorhombic phase with the frequency softening as the pressure rises. Pressures above 9 GPa considerably transform the Raman spectra, indicating a structural phase transition. © 2016, Allerton Press, Inc.
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Публикация на русском языке
Динамика решеток и барическое поведение фононов в кристаллах Hg2Cl2 при высоких гидростатических давлениях [Текст] / Е. М. Рогинский [и др.] // Изв. РАН. Сер. физ. - 2016. - Т. 80 № 9. - С. 1132-1136
Держатели документа:
Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
St. Petersburg State University, St. Petersburg, Russian Federation
Доп.точки доступа:
Roginskii, E. M.; Krylov, A. S.; Крылов, Александр Сергеевич; Markov, Y. F.; Smirnov, M. B.
}
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16.
Lattice dynamics and
ferroelectric instability in ordered and disordered PbSc1/2Ta1/2O3 and PbSc1/2Nb1/2O3 solid solutions / V. I. Zinenko [et al.]> // J. Exp. Theor. Phys. - 2007. -
Vol. 105
,
Is. 3
. - P. 617-625,
DOI
10.1134/S1063776107090191. - Cited References: 23 . - ISSN 1063-7761
Кл.слова (ненормированные):
Dipole moment
--
Lattice vibrations
--
Negative ions
--
Phonons
--
Positive ions
--
Solid solutions
--
Dynamic Born charges
--
Ferroelectric instabilities
--
Frequency spectra
--
Gordon-Kim models
--
Oxygen anions
--
Phonon spectra
--
Ferroelectricity
Аннотация:
The dynamic Born charges and the frequency spectra of lattice oscillations in the crystals of ordered and disordered PbSc1/2Ta1/2O3 (PST) and PbSc1/2Nb1/2O3 (PSN) solid solutions have been calculated within the framework of the generalized Gordon-Kim model with allowance for the dipole and quadrupole polarizabilities. The phonon spectra of both compounds contain ferroelectric soft modes. The influence of various interactions on the magnitude of dynamic charges and ferroelectric instability in PSN and PST solid solutions has been studied and it is shown that both these charges and the ferroelectric instability are determined by the competition between long-range dipole-dipole interactions and short-range dipole-charge interactions, the determining role played by the interaction of Nb (Ta) cations and oxygen anions in the Nb-O (Ta-O) bond direction.
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Публикация на русском языке
Динамика решетки и сегнетоэлектрическая неустойчивость в упорядоченных и неупорядоченных твердых растворах РbSc1/2 Ta1/2 O3 и PbSc1/2 Nb1/2 0 3 [Текст] / В. И. Зиненко, Н. Г. Замкова, Е. Г. Максимов, С. Н. Софронова // Журн. эксперим. и теор. физ. - Москва : Наука, 2007. - Т. 132 № 3. - С. 702-711
Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991, Russian Federation
Доп.точки доступа:
Zinenko, V. I.; Зиненко, Виктор Иванович; Zamkova, N. G.; Замкова, Наталья Геннадьевна; Maksimov, E. G.; Sofronova, S. N.; Софронова, Светлана Николаевна
}
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17.
Lattice dynamics and
raman scattering spectrum of elpasolite Rb2KScF6: Comparative analysis / S. N. Krylova [et al.]> // Phys. Solid State. - 2004. -
Vol. 46
,
Is. 7
. - P. 1311-1319,
DOI
10.1134/1.1778457. - Cited References: 18 . - ISSN 1063-7834
РУБ
Physics, Condensed Matter
Рубрики:
STRUCTURAL PHASE-TRANSITION
LIGHT-SCATTERING
OPTICAL
PHONONS
SOFT-MODE
CRYSTAL
Аннотация:
Raman scattering spectra of elpasolite Rb2KScF6 are studied in a wide temperature range including two phase transitions: from the cubic to the tetragonal phase and then to the monoclinic phase. The experimental Raman scattering spectrum is compared with the lattice vibration spectra of these phases calculated using an ab initio approach. A number of anomalies (caused by structural rearrangement during the phase transitions) are revealed and quantitatively analyzed in the ranges of both the intramolecular vibrations of the octahedron molecular ScF6 ions and low-frequency intermolecular lattice vibrations. The interaction between low-frequency intramolecular vibrations and the intermolecular modes is found to be significant, and strong resonance interaction of the rotational soft modes (which are recovered below the phase transition points) with hard low-frequency vibrations of the rubidium ion sublattice is detected. These interactions are shown to substantially complicate the spectra. (C) 2004 MAIK "Nauka / Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Univ Maine, F-72085 Le Mans 9, France
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Universite du Maine, Le Mans, Cedex 9, 72085, France
Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Vtyurin, A. N.; Втюрин, Александр Николаевич; Bulou, A.; Krylov, A. S.; Крылов, Александр Сергеевич; Zamkova, N. G.; Замкова, Наталья Геннадьевна
}
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18.
Lattice dynamics in
the double-helix antiferromagnet FeP / A. S. Sukhanov, S. E. Nikitin, M. S. Pavlovskii [et al.]> // Phys. Rev. Research. - 2020. -
Vol. 2
,
Is. 4
. - Ст. 043405,
DOI
10.1103/PhysRevResearch.2.043405. - Cited References: 57. - A.S.S. thanks D. A. Maksimov for fruitful discussions. I.V.M. thanks RSF 19-43-04129 for financial support in the frame of the joint DFG-RSF project, I.O.C. thanks the RFBR fund (grant 18-33-01282 [58]). D.S.I. acknowledges support from the German Research Foundation (DFG) under Grant No. IN 209/9-1, via the project C03 of the Collaborative Research Center SFB 1143 (project-id 247310070) at the TU Dresden and the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matterials — ct.qmat (EXC 2147, project-id 390858490). S.A. acknowledges DFG funding No. AS 523∖4-1. This work used phonon explorer software for data analysis. Work at the University of Colorado-Boulder was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Office of Science, under Contract No. DE-SC0006939 . - ISSN 2643-1564
Перевод заглавия:
Динамика решетки в двухспиральном антиферромагнетике FeP
Рубрики:
Lattice dynamics
Phonons
Аннотация:
We present a comprehensive investigation of lattice dynamics in the double-helix antiferromagnet FeP by means of high-resolution time-of-flight neutron spectroscopy and ab initio calculations.
Phonons
can hybridize with the magnetic excitations in noncollinear magnets to significantly influence their properties. We observed a rich spectrum of phonon excitations, which extends up to ∼50 meV. We performed detailed analysis of the observed and calculated spectra for all high-symmetry points and high-symmetry directions of the Brillouin zone. We show that the DFT calculations quantitatively capture the essential features of the observed
phonons
, including both dispersions and scattering intensities. By making use of the detailed intensity comparison between the theory and the data, we were able to identify displacement vectors for the majority of the observed modes. The overall excellent agreement between the DFT predictions and the experimental results breaks down for the lowest mode at the Y point, whose energy is lower than calculated by ∼13%. The present study provides vital information on the lattice dynamics in FeP and demonstrates applicability of the DFT to novel pressure-induced phenomena in related materials, such as MnP and CrAs.
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Держатели документа:
Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany
Institut für Festkörper- und Materialphysik, Technische Universität Dresden, D-01069 Dresden, Germany
Paul Scherrer Institute (PSI), CH-5232 Villigen, Switzerland
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Department of Physics, University of Colorado at Boulder, Boulder, Colorado 80309, USA
ISIS Facility, STFC, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11-0QX, United Kingdom
Leibniz Institute for Solid State and Materials Research Dresden, D-01069 Dresden, Germany
Lomonosov Moscow State University, 119991 Moscow, Russia
Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter — ct.qmat, TU Dresden, D-01069 Dresden, Germany
Доп.точки доступа:
Sukhanov, A. S.; Nikitin, S. E.; Pavlovskii, M. S.; Павловский, Максим Сергеевич; Sterling, T. C.; Andryushin, N. D.; Андрюшин, Никита Дмитриевич; Cameron, A. S.; Tymoshenko, Y. V.; Walker, H. C.; Morozov, I. V.; Chernyavskii, I. O.; Aswartham, S.; Reznik, D.; Inosov, D. S.
}
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19.
Nanostructured photosensitive layer
for Tamm-plasmon-polariton-based organic solar cells / R. G. Bikbaev, D. A. Pykhtin, S. Ya. Vetrov [et al.]> // Appl. Opt. - 2022. -
Vol. 61
,
Is. 17
. - P. 5049-5054,
DOI
10.1364/AO.456413. - Cited References: 47. - Council on Grants of the President of the Russian Federation (MK-46.2021.1.2) . - ISSN 1559-128X
Кл.слова (ненормированные):
Efficiency
--
Nanoparticles
--
Organic solar cells
--
Phonons
--
Photons
--
Photosensitivity
--
Plasmonics
--
Refractive index
--
Scattering parameters
--
Transfer matrix method
Аннотация:
The influence of the volume fraction of plasmonic nanoparticles on the efficiency of the Tamm-plasmon-polariton-based organic solar cell is investigated in the framework of temporal coupled mode theory and confirmed by the transfer matrix method. It is shown that, unlike a conventional plasmonic solar cell, in which the efficiency is directly proportional to the volume fraction of nanoparticles in the photosensitive layer, the efficiency of the proposed solar cell reaches the highest value at low volume fractions. This effect is explained by the fact that at these volume fractions, the critical coupling condition of the incident field with the Tamm plasmon polariton is fulfilled. Thus, for the incoming radiation range of 350 to 500 nm, a maximal cell efficiency of 28% is achieved with a volume fraction of nanoparticles equal to 10%. Additionally, the optical properties of the photosensitive layer are compared for the cases of determining its complex refractive index by effective medium theory and the S-parameter retrieval method. A good agreement between the results is demonstrated, which encourages the use of the effective medium theory for preliminary calculations.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Доп.точки доступа:
Bikbaev, R. G.; Бикбаев, Рашид Гельмединович; Pykhtin, D. A.; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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20.
Negative-index nonlinear optics:
phonons
vs plasmons / A. K. Popov, M. I. Shalaev, S. A. Myslivets, V. V. Slabko> //
Proc. Int. Conf. on Electrodynamics of complex Materials for Advanced Technologies (PLASMETA'11). - 2011. - P43-44
Материалы конференции
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Доп.точки доступа:
Popov, A.K.; Shalaev, M.I.; Myslivets, S. A.; Мысливец, Сергей Александрович; Slabko, V.V.; International Conference on Electrodynamics of complex Materials for Advanced Technologies(2011 ; Sep. ; 21-26 ; Samarkand, Uzbekistan); Самаркандский государственный университет им. А. Навои
}
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