Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=Green's function<.>)

Общее количество найденных документов : 15
Показаны документы с 1 по 10

1-10 11-15

Ignatchenko, V. A.
Local density of states in one-dimensional photonic crystals and sinusoidal superlattices / V. A. Ignatchenko, D. S. Tsikalov // Physics Procedia : Elsevier, 2017. - Vol. 86. - P. 113-116, DOI 10.1016/j.phpro.2017.01.030. - Cited References: 14
Кл.слова (ненормированные):
photonic crystals -- Green's function -- LDOS -- sinusoidal modulation -- chain fractions
Аннотация: We have calculated the local density of states (LDOS) for four Brillouin zones of a superlattice for a plane source depending on its location relative to the change in the profile of dielectricpermeability (z) of the superlattice. It is shown that the LDOS for the cases of sinusoidal and rectangular profiles of (z) are close to each other in the first and second Brillouin zones, and sharp differences between them appear beginning with the third zone. Radical changes in the LDOS occur in a rectangular superlattice with different thicknesses of adjacent layers. In this case, the function LDOS has a sharp jump at the edges of the allowed bands in the transition from one layer to another. The effects studied theoretically in this paper, can be detected and studied experimentally by the intensively developing currently methods of nanooptics. © 2017 The Authors.

Смотреть статью,
Scopus,
Читать в сети ИФ

Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис 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 Micro-Structures(2015 ; 19-20 June ; Tomsk)
}
Найти похожие

Ignatchenko, V. A.
Green’s function of magnetoelastic waves / V. A. Ignatchenko, D. S. Polukhin // Solid State Phenom. : Selected, peer reviewed papers. - 2015. - Vol. 233-234: Achievements in Magnetism. - P. 12-15, DOI 10.4028/www.scientific.net/SSP.233-234.12 . - ISSN 1662-9779. - ISSN 978-3-038
Кл.слова (ненормированные):
Dispersion relations -- Elastic waves -- Green’s functions -- Magnetoelastic coupling -- Resonances -- Spin waves -- Green's function -- Resonance -- Spin waves -- Wave propagation -- Approximate expressions -- Dipole dipole interactions -- Dispersion relations -- Elastic oscillations -- Longitudinal elastic wave -- Magnetoelastic couplings -- Off-diagonal elements -- S function -- Elastic waves
Аннотация: The matrix (5x5) Green's function of magnetoelastic waves in an isotropic magnetoelastic medium taking into account the dipole-dipole interaction has been derived. The imaginary parts of diagonal and off-diagonal elements of the Green's function in the crossing resonance of spin and longitudinal elastic waves has been investigated. It is shown that under changing the angle of wave propagation θ the amplitudes of Green functions change drastically due redistribution of energy between the magnetic and elastic oscillation. Approximate expressions for the dependence of the widths of the gaps in the spectrum on the angle θ have been also derived. © (2015) Trans Tech Publications, Switzerland.

Scopus,
Материалы конференции,
Смотреть статью,
Читать в сети ИФ

Доп.точки доступа:
Perov, N. \ed.\; Semisalova, A. \ed.\; Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(6 ; 2014 ; June-July ; Moscow)
}
Найти похожие

Ignatchenko, V. A.
Green’s functions of spin and electromagnetic waves in the sinusoidal superlattice / V. A. Ignatchenko, D. S. Tsikalov // Solid State Phenom. : Selected, peer reviewed papers. - 2015. - Vol. 233-234: Achievements in Magnetism. - P. 47-50, DOI 10.4028/www.scientific.net/SSP.233-234.47 . - ISSN 1662-9779. - ISSN 978-3-038
Кл.слова (ненормированные):
Continued fractions -- Electromagnetic waves -- Green’s functions -- Magnonic crystals -- Photonic crystals -- Sinusoidal modulation -- Spin waves -- Superlattices -- Circular waveguides -- Fourier transforms -- Green's function -- Photonic crystals -- Spin waves -- Superlattices -- Analytical expressions -- Continued fraction -- Fourier transformations -- Magnonic crystals -- S function -- Sinusoidal modulation -- Spectral representations -- Electromagnetic waves
Аннотация: The problem of finding the Green's function of spin and electromagnetic waves in the sinusoidal superlattice is considered. An analytical expression for the spectral representation of the Green's function has been found in the form of ascending continued fractions, the particular denominators of which are ordinary continued fractions. The Green’s function in the r -space has been found by the numerical Fourier transformation of the Greens’s function found in the spectral representation. © (2015) Trans Tech Publications, Switzerland.

Scopus,
Материалы конференции,
Смотреть статью,
Читать в сети ИФ

Доп.точки доступа:
Perov, N. \ed.\; Semisalova, A. \ed.\; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(6 ; 2014 ; June-July ; Moscow)
}
Найти похожие

Ignatchenko, V. A.
Spectral properties of superlattices with anisotropic inhomogeneities. The transition from 3D to 2D disorder / V. A. Ignatchenko, A. V. Pozdnyakov // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P. 597-600, DOI 10.4028/www.scientific.net/SSP.190.597 . - ISBN 1012-0394. - ISBN 9783037854365
Кл.слова (ненормированные):
Anisotropic inhomogeneities -- DOS -- Green Function -- Superlattice -- Susceptibility -- Waves -- Anisotropic inhomogeneities -- Continuous transitions -- Correlation properties -- Density of state -- Dynamic susceptibility -- Inhomogeneities -- Spectral properties -- Wave numbers -- DOS -- Green's function -- Magnetic materials -- Magnetic susceptibility -- Superlattices -- Three dimensional -- Waves -- Anisotropy
Аннотация: Waves in superlattice (SL) contained inhomogeneities with anisotropic correlation properties are considered. The anisotropy of the correlation during the transition from 3D to 2D disorder is characterized by the parameter ? 1 = k ||/k?-1, where k || and k? are the correlation wave numbers along the axis of the SL and in the plane of the its layers, respectively (r || =k || -1 and r?=k?-1 are the correlation radii). Dependencies of both the dynamic susceptibility and density of states at the continuous transition from the isotropic three-dimensional inhomogeneities (? 1 = 0) to the twodimensional ones (? 1 = -1) have been obtained. В© (2012) Trans Tech Publications.

Scopus

Доп.точки доступа:
Pozdnyakov, A. V.; Поздняков, А.В.; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
Найти похожие

Ignatchenko, V. A.
Spin and elastic waves with the random coupling parameter / V. A. Ignatchenko, D. S. Polukhin // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2012. - Vol. 190. - P. 51-54, DOI 10.4028/www.scientific.net/SSP.190.51 . - ISBN 1012-0394. - ISBN 9783037854365
Кл.слова (ненормированные):
Dynamic susceptibility -- Elastic waves -- Inhomogeneities -- Magnetoelastic coupling -- Self-consistent approximation -- Spin waves -- Anti-resonance -- Dispersion law -- Dynamic susceptibility -- Inhomogeneities -- Magnetoelastic couplings -- Magnetoelastic waves -- Narrow resonances -- Physical nature -- Random couplings -- Self-consistent approximation -- Wave numbers -- Wavefields -- Green's function -- Magnetic materials -- Magnetic susceptibility -- Spin waves -- Elastic waves
Аннотация: Dynamic susceptibilities (Green's function) in a system of two wave fields of different physical nature connected by the zero-mean random coupling parameter are studied. Magnetoelastic waves in zero-mean magnetostrictive media are considered. It is shown that the Green's functions of the spin G? m(?) and elastic G? u(?) waves at the intersection of the initial dispersion laws have the form of broad single-mode peaks with the fine structure on the tops of these peaks: the narrow resonance on the top of G? m(?) and the narrow antiresonance on the top of G? u(?) For the longwave inhomogeneities the widths of the broad peaks and narrow peaks are determined by the rootmean- square fluctuation and the correlation wave number, respectively. В© (2012) Trans Tech Publications.

Scopus

Доп.точки доступа:
Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
}
Найти похожие

Val'kov, V. V.
Thermodynamic properties of two-layer quasi-two-dimensional antiferromagnets / V. V. Val'kov, A. D. Fedoseev // Theor. Math. Phys. - 2011. - Vol. 168, Is. 3. - P. 1216-1224, DOI 10.1007/s11232-011-0099-6. - Cited References: 16. - This work was supported in part by the Russian Foundation for Basic Research (Grant No. 10-02-00251), the Presidium of the Russian Academy of Sciences (Fundamental Research Program "Quantum Physics of Condensed Matter"), the Siberian Branch of the Russian Academy of Sciences (Integration Project No. 53 and Lavrentiev Competition of Youth Projects, A. D. F.), the Ministry of Education and Science of the Russian Federation (Program "Scientific and Pedagogical Personnel of Innovative Russia" for 2009-2013), and the President of the Russian Federation (Grant No. MK-1300.2011.2, A. D. F.). . - ISSN 0040-5779

РУБ Physics, Multidisciplinary + Physics, Mathematical
Рубрики:
HEISENBERG-MODEL
SPIN-WAVE
Кл.слова (ненормированные):
antiferromagnetism -- high-temperature superconductor -- Tyablikov approximation -- Green's function -- antiferromagnetism -- Green's function -- high-temperature superconductor -- Tyablikov approximation
Аннотация: For two-layer quasi-two-dimensional antiferromagnets of type YBaCuO in the Tyablikov approximation, we investigate the dependences of the energy spectrum and the temperature of transition into an ordered state on both the quasi-two-dimensionality parameter and the intensity of the exchange coupling of spin moments located in two close planes. We assume that the exchange parameters inside the CuO (2) planes are much greater than the exchange parameters resulting in coupling between a spin located on a plane of an elementary cell and a spin on another plane of a different elementary cell. The obtained expressions for the N,el temperature and for the sublattice magnetic moment at zero temperature describe the dependences of these quantities on the parameters of interplane exchange interactions.

WOS,
Scopus,
Читать в сети ИФ
Держатели документа:
[Val'kov, V. V.
Fedoseev, A. D.] RAS, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, RAS, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Fedoseev, A. D.; Федосеев, Александр Дмитриевич; Вальков, Валерий Владимирович
}
Найти похожие

Ignatchenko, V. A.
Spectral Properties of Superlattices with Anisotropic inhomogeneities. The Transition from 3D to 1D Disorder / V. A. Ignatchenko, A. V. Pozdnyakov ; ed. ko, VA Ignatch // TRENDS IN MAGNETISM. Ser. Solid State Phenomena / Euro-Asian Symposium "Trends in MAGnetism": Nanospintronics (4 ; 2010 ; 28 June-2 July ; Ekaterinburg) : TRANS TECH PUBLICATIONS LTD, 2011. - Vol. 168-169. - P. 85-88, DOI 10.4028/www.scientific.net/SSP.168-169.85. - Cited References: 4 . - ISBN 1012-0394

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

Кл.слова (ненормированные):
superlattice -- waves -- anisotropic inhomogeneities -- Green's function -- susceptibility -- DOS
Аннотация: Waves in the superlattice (SL) contained inhomogeneities with anisotropic correlation properties are considered. The anisotropy of the correlations is characterized by the parameter lambda=1-k(perpendicular to)/k(parallel to), where k(parallel to) and k(perpendicular to) are the correlation wave numbers along the axis of the SL and in the plane of its layers, respectively (r(parallel to) = k(parallel to)(-1) and r(perpendicular to) = k(perpendicular to)(-1) are the correlation radii). Dependencies of both the dynamic susceptibility and density of states at the continuous transition from the isotropic three-dimensional inhomogeneities (lambda=0) to the one-dimensional ones (lambda=1) have been obtained.

WOS

Доп.точки доступа:
Pozdnyakov, A. V.; Ignatchenko, V. A. \ed.\; Игнатченко, Вальтер Алексеевич; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg)
}
Найти похожие

Ignatchenko, V. A.
Spectral properties of superlattices with anisotropic inhomogeneities. The transition from 3D to 1D disorder / V. A. Ignatchenko, A. V. Pozdnyakov // Diffusion and Defect Data Pt.B: Solid State Phenomena. - 2011. - Vol. 168-169. - P. 85-88, DOI 10.4028/www.scientific.net/SSP.168-169.85 . - ISSN 1012-0394. - ISSN 9783-0378
Кл.слова (ненормированные):
Anisotropic inhomogeneities -- DOS -- Green's function -- Superlattice -- Susceptibility -- Waves -- Anisotropic inhomogeneities -- Continuous transitions -- Correlation properties -- Density of state -- Dynamic susceptibility -- Inhomogeneities -- Spectral properties -- Susceptibility -- Wave numbers -- Differential equations -- Magnetic susceptibility -- Superlattices -- Three dimensional -- Anisotropy
Аннотация: Waves in the superlattice (SL) contained inhomogeneities with anisotropic correlation properties are considered. The anisotropy of the correlations is characterized by the parameter ? = 1-k? / k ?, where k ? and k? are the correlation wave numbers along the axis of the SL and in the plane of its layers, respectively (r ? k ?-1 and r? = k?-1 are the correlation radii). Dependencies of both the dynamic susceptibility and density of states at the continuous transition from the isotropic three-dimensional inhomogeneities (? = 0 ) to the one-dimensional ones (? =1) have been obtained.

Scopus,
http://www.scopus.com/inward/record.url?eid=2-s2.0-79951935984&partnerID=40&md5=7897afbfe65d66e8eb402827cc610bd1

Доп.точки доступа:
Pozdnyakov, A. V.; Игнатченко, Вальтер Алексеевич; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg)
}
Найти похожие

Ignatchenko, V. A.
Spectral properties of waves in superlattices with 2D and 3D inhomogeneities / V. A. Ignatchenko, D. S. Tsikalov // Journal of Experimental and Theoretical Physics. - 2011. - Vol. 113, Is. 2. - P. 232-244, DOI 10.1134/S1063776111080061 . - ISSN 1063-7761
Кл.слова (ненормированные):
Analytic expressions -- Brillouin zone boundary -- Density of state -- Dynamic susceptibility -- Inhomogeneities -- One-dimensional density -- Optical methods -- Optical structures -- Peak height -- Root mean squares -- Spectral properties -- Superlattice layers -- Two phase -- Wave numbers -- Green's function -- Magnetic susceptibility -- Optical multilayers -- Phase interfaces -- Three dimensional -- Superlattices
Аннотация: We investigate the dynamic susceptibility and one-dimensional density of states in an initially sinusoidal superlattice containing simultaneously 2D phase inhomogeneities simulating correlated rough-nesses of superlattice interfaces and 3D amplitude inhomogeneities of the superlattice layer materials. The analytic expression for the averaged Green's function of the sinusoidal superlattice with two phase inhomogeneities is derived in the Bourret approximation. It is shown that the effect of increasing asymmetry in the peak heights of dynamic susceptibility at the Brillouin zone boundary of the superlattice, which was discovered earlier [15] upon an increase in root-mean-square (rms) fluctuations, also takes place upon an increase in the correlation wavenumber of inhomogeneities. However, the peaks in this case also become closer, and the width and depth of the gap in the density of states decrease thereby. It is shown that the enhancement of rms fluctuations of 3D amplitude inhomogeneities in a superlattice containing 2D phase inhomogeneities suppresses the effect of dynamic susceptibility asymmetry and leads to a slight broadening of the gap in the density of states and a decrease in its depth. Targeted experiments aimed at detecting the effects studied here would facilitate the development of radio-spectroscopic and optical methods for identifying the presence of inhomogeneities of various dimensions in multilayer magnetic and optical structures. В© 2011 Pleiades Publishing, Ltd.

Scopus,
Читать в сети ИФ

Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
}
Найти похожие

10.

Spin fluctuation processes in the problem of s-wave superconducting phase of the heavy-fermion intermetallides / V. V. Val'kov, D. M. Dzebisashvili // J. Phys. Conf. Ser. - 2010. - Vol. 200, Is. SECTION 1, DOI 10.1088/1742-6596/200/1/012030 . - ISSN 1742-6588
Кл.слова (ненормированные):
Anomalous component -- Critical points -- Critical temperatures -- Heavy-fermion -- Hubbard operators -- Kinematic mechanism -- One-loop approximation -- Periodic Anderson model -- Self-consistent equations -- Skutterudites -- Strong electron correlations -- Superconducting phase -- Superconducting phase transitions -- Green's function -- Mathematical operators -- Phase diagrams -- Shear waves -- Spin fluctuations -- Superconductivity -- Phase transitions
Аннотация: In the framework of the periodic Anderson model in the limit of strong electron correlations a theory of s-wave superconductivity (this phase has been recently discovered in the skutterudite LaFe4P12) has been developed. The theory is based on kinematic mechanism, provided that the spin fluctuation processes (SFP) are taken into account.To obtain the self-consistent equations for the superconducting phase the diagram technique for Hubbard operators has been used. The exact representations of normal and anomalous Green's functions in terms of normal and anomalous components of mass and strength operators have been obtained. A set of integral equations for superconducting phase was deduced with the assumption that SFP have been accounted for. In the solution of these equations normal and anomalous components of the mass and strength operators have been calculated in the one-loop approximation. Computation has revealed that SFP result in substantial decreasing of critical temperature Tc and shifting the concentration critical point of the superconducting phase transition. © 2010 IOP Publishing Ltd.

Scopus,
eLibrary
Держатели документа:
L.V.Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Val'kov, V. V.; Вальков, Валерий Владимирович; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович
}
Найти похожие