Труды сотрудников института физики

/ E.M. Aver'yanov // JETP Letters. - 2012. - Vol. 95, Is. 1. - P. 51-54, DOI 10.1134/S002136401201002X. - Cited References: 18 . - ISSN 0021-3640РУБ Physics, Multidisciplinary

Аннотация: Experimental values of the Lorentz tensor components and the local field of a light wave have been obtained for anisotropic films of polypeptide and DNA. These data indicate an increase in the mean value and anisotropy of the polarizability of biomolecules with respect to an isotropic solution. These changes in the polarizability as an indicator of the response of biomolecules to external actions, as well as their chemical and biological activity, specify the direction of the evolution of the properties of biomolecules in orientationally ordered media.

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Доп.точки доступа:
Аверьянов, Евгений Михайлович

/ Е.М. Аверьянов // Письма в Журн. эксперим. и теор. физ. - 2012. - Т. 95, Вып. 1-2. - С. 55-58. - Библиогр.: 18 назв. . - ISSN 0370-274X
Аннотация: Для анизотропных пленок полипептида и ДНК получены экспериментальные значения компонент тензоров Лорентца и локального поля световой волны, которые отвечают возрастанию средней величины и анизотропии поляризуемости биомолекул относительно изотропного раствора. Эти изменения поляризуемости как индикатора отклика биомолекул на внешние воздействия, а также их химической и биологической активности задают направление эволюции свойств биомолекул в ориентационно упорядоченных средах.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Aver'yanov, E. M.

/ В. В. Вальков, С. В. Аксенов, Е. А. Уланов // Письма в Журн. эксперим. и теор. физ. - 2013. - Т. 98, Вып. 7. - С. 459-465DOI 10.7868/S0370274X13190107 . -
Аннотация: Исследовано влияние многократного отражения при электронном транспорте на вольт-амперную характеристику адсорбированного магнитного атома с одноионной анизотропией. Для учета вкладов всех порядков теории возмущений по параметрам связи контактов с многоуровневой примесью применены операторы Хаббарда и диаграммная техника Келдыша. Показано, что в режиме сильной неравновесности вольт-амперные характеристики рассмотренной системы содержат участки с отрицательной дифференциальной проводимостью. Обсуждаются способы увеличения этого эффекта.

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Аксенов, Сергей Владимирович; Aksenov, S. V.; Уланов, Е. А.; Val'kov, V. V.

/ 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
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.

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

/ V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // JETP Letters. - 2013. - Vol. 98, Is. 7. - P. 403-409, DOI 10.1134/S0021364013200162. - Cited References: 27. - This work was supported by the Presidium of the Russian Academy of Sciences (program "Quantum Mesoscopic and Disordered Systems"), the Ministry of Education and Science of Russian Federation (state contract no. 16.740.11.0644, federal program "Human Capital for Science and Education in Innovative Russia" for 2009-2013), and the Russian Foundation for Basic Research (project nos. 12-02-31130, 13-02-00523, and 13-02-98013). S. V. A. is grateful to the Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools, project nos. MK-526.2013.2 and SP-6361.2013.5. . - ISSN 0021-3640РУБ Physics, Multidisciplinary

Аннотация: The effect of multiple reflection in the process of electron transport on the current-voltage characteristics of an adsorbed magnetic atom with single-ion anisotropy has been investigated. All orders of the perturbation theory with respect to the parameter of coupling between the contacts and the multilevel impurity have been taken into account by the Keldysh diagram technique with the use of Hubbard operators. It has been shown that the current-voltage characteristics of the system in a strongly nonequilibrium regime contains regions of negative differential conductance. The ways of enhancing this effect are discussed.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Вальков, Валерий Владимирович; Presidium of the Russian Academy of Sciences; Ministry of Education and Science of Russian Federation [16.740.11.0644]; Russian Foundation for Basic Research [12-02-31130, 13-02-00523, 13-02-98013]; Council of the President of the Russian Federation for Support of Young Scientists and Leading Scientific Schools [MK-526.2013.2, SP-6361.2013.5]

/ I. V. Timofeev [et al.] // Phys. Rev. E. - 2012. - Vol. 85, Is. 1. - Ст. 11705, DOI 10.1103/PhysRevE.85.011705. - Cited References: 39. - This work was supported in part by DSP Grant No. 2.1.1/3455; RAS Grants No. 3.9.1 and No. 21.1, SB RAS Grants No. 5 and No. 144, and by the National Science Council of Taiwan under Grant No. NSC 98-2923-M-033-001-MY3. . - ISSN 1539-3755РУБ Physics, Fluids & Plasmas + Physics, Mathematical

Аннотация: Defect modes are investigated in a band gap of an electrically tunable one-dimensional photonic crystal infiltrated with a twisted-nematic liquid crystal. Their frequency shift and interference under applied voltage are studied both experimentally and theoretically. We deal with the case where the defect layer thickness is much larger than the wavelength (i.e., the Mauguin condition). It is shown theoretically that the defect modes could have a complex structure with elliptic polarization. Two series of polarized modes are coupled with each other and exhibit an avoided crossing phenomenon in the case of opposite parity.

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

Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Lin, Y. T.; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vetrov, S. Y.; Lee, W.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич

/ A. V. Chzhan, S. Y. Kiparisov, G. S. Patrin // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 150-153, DOI 10.4028/www.scientific.net/SSP.215.150. - Cited References: 8 . - ISSN 978-30383. - ISSN 1662-9779
Аннотация: Coercivity of amorphous Co-P single-layer and trilayer films fabricated by chemical deposition has been investigated. It has been established that the thickness dependences of the coercivity for isotropic and anisotropic films are different. Data on the coercivity variation with a nonmagnetic spacer thickness and a number of magnetic layers in the trilayer films are reported. The results obtained are analyzed with regard to the features of the induced anisotropy in amorphous ferromagnetic films and the magnetic coupling between magnetic layers in sandwich structures.© (2014) Trans Tech Publications, Switzerland.


Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Kiparisov, S. Y.; Кипарисов, Семен Яковлевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Чжан, Анатолий Владимирович; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)

/ V. V. Val'kov, S. V. Aksenov, E. A. Ulanov // J. Exp. Theor. Phys. - 2014. - Vol. 119, Is. 1. - P. 124-137, DOI 10.1134/S1063776114060065. - Cited References: 35. - This work was performed under the Program "Quantum Mesoscopic and Disordered Systems" of the Presidium of the Russian Academy of Sciences and supported financially by the Russian Foundation for Basic Research (project nos. 13-02-00523, 13-02-98013, and 14-02-31280). The work of one of coauthors (S. V. A.) was supported by grant no. MK-526-526.2013.2 of the President of the Russian Federation and scholarship SP-6361.2013.5 of the President of the Russian Federation. . - ISSN 1063-7761. - ISSN 1090-6509РУБ Physics, Multidisciplinary

Аннотация: Quantum transport of electrons through a magnetic impurity located in an external magnetic field and affected by a substrate is considered using the Keldysh diagram technique for the Fermi and Hubbard operators. It is shown that in a strongly nonequilibrium state induced by multiple reflections of electrons from the impurity, the current-voltage (I-V) characteristic of the system contains segments with a negative conductivity. This effect can be controlled by varying the anisotropy parameter of the impurity center as well as the parameters of coupling between the magnetic impurity and metal contacts. The application of the magnetic field is accompanied by an increase in the number of Coulomb steps in the I-V curve of the impurity. The effect of appreciable magnetoresistance appears in this case. We demonstrate the possibility of switching between magnetic impurity states with different total spin projection values in the regime of asymmetric coupling of this impurity with the contacts.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Aksenov, S. V.; Аксенов, Сергей Владимирович; Ulanov, E. A.; Уланов Е. А.; Вальков, Валерий Владимирович; Russian Foundation for Basic Research [13-02-00523, 13-02-98013, 14-02-31280]; Russian Federation [MK-526-526.2013.2, SP-6361.2013.5]

[Текст]
. - Электронный журнал / С. Я. Ветров, П. С. Панкин, И. В. Тимофеев // Ученые зап. физ. фак-та МГУ. - 2014. - № 4. - С. 144304. - Библиогр.: 3 назв.
   Перевод заглавия: S–polarized spectrum of one-dimensional photonic crystal with anisotropic nanocomposite defect layer
Аннотация: Исследованы спектральные свойства одномерного фотонного кристалла с дефектом структуры, в качестве которого рассмотрен слой анизотропного нанокомпозита, внедренного между двумя многослойными диэлектрическими зеркалами. Выявлен ряд важных особенностей в спектре пропускания фотонного кристалла.
Spectral properties are investigated of one-dimensional photonic crystal with structure defect which is considered as an anisotropic nanocomposite layer embedded between two multilayer dielectric mirrors. A number of important features in the transmission spectrum of the photonic crystal are found.

Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Панкин, Павел Сергеевич; Тимофеев, Иван Владимирович; Timofeev, I. V.; Vetrov, S. Ya.

/ G. T. Prodaivoda [и др.] // Geol. Geofiz. - 2000. - Vol. 41, Is. 3. - P. 436-449. - Cited References: 25 . - ISSN 0016-7886
Аннотация: A generalized method of conditional moments for computation of effective elastic constants of anisotropic rocks with spatially oriented microcracks is considered. The method involves an additional operation of averaging of known solution data for a modeled rock of orthorhombic structure with ellipsoidal microcracks whose semiaxes are oriented along the coordinate axes. The averaging is performed using the distribution function of rock microcrack orientations, which is expanded into a series in terms of generalized spherical functions. The expansion coefficients are determined by an experiment. In calculating the effective elastic constants of anisotropic rocks, there are no constraints on the concentration of microcracks. We have studied the parameters of azimuthal anisotropy of elastic-wave velocities in modeled amphibolites with ellipsoidal hornblende grains oriented along the coordinate axes and with three-planar and spatially oriented systems of microcracks. The obtained results agree with experimental data of ultrasonic determinations of elastic constants for amphibolite samples.

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Держатели документа:
Univ Kiel, UA-252022 Kiev, Ukraine
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
Natl Acad Sci Ukraine, Inst Mech, UA-252017 Kiev, Ukraine
ИФ СО РАН

Доп.точки доступа:
Prodaivoda, G. T.; Продайвода, Георгий Трофимович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Vyzhva, S. A.; Nazarenko, L. V.

/ G. T. Prodaivoda, K. S. Aleksandrov // Geol. Geofiz. - 1998. - Vol. 39, Is. 3. - P. 375-385. - Cited References: 22 . - ISSN 0016-7886
Аннотация: Using an invariant-polarization ultrasound method, we have studied the velocities of elastic waves in the gneisses and amphibolites of the second rock mass of the Archean complex of the Kola superdeep borehole (7622-9456 m) and calculated the determinate components of acoustic tensor and elastic-constant tensor and their symmetry. The symmetry of the studied structures is shown to be rhombic and triclinic. The stereoprojections of mineral's crystallographic orientation and normals to microfractures are built by the data on the inversion of the azimuthal dependence of elastic constants.

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Держатели документа:
Kiev State Univ, Ul Vasilkovskaya 90, UA-252022 Kiev, Ukraine
Russian Acad Sci, Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Продайвода, Георгий Трофимович

/ S. G. Ovchinnikov, V. V. Rudenko // Phys. Usp. - 2014. - Vol. 57, Is. 12. - P. 1180-1198, DOI 10.3367/UFNe.0184.201412b.1299. - Cited References:97. - We are grateful to L M Rudenko, T V Spirina, and N V Veretennikova for the assistance in the preparation of this review. This study was supported in part by the Program of Federal Support for Leading Scientific Schools of the Russian Federation (project No. NSh 1044.2012.2); by the President's Program of Support for Leading Scientific Schools (project No. NSh-2886.2014.2); and by the Russian Foundation for Basic Research (project No. 13-02-00358). . - ISSN 1063. - ISSN 1468-4780. - ISSN РУБ Physics, Multidisciplinary

Аннотация: Anisotropy mechanisms in compounds with S-state ions are discussed, including the 'single-ion' exchange mechanism that was developed theoretically by Nikiforov and coworkers based on the two-ion model and which has only recently received detailed experimental study. Results demonstrating the significant role of the 'single-ion' source are presented. An independent generalized method for quantitatively describing and predicting the anisotropy of magnetically ordered crystals is discussed, and its potential for the investigation of the BiFeO3 multiferroic in the region of the existence of a spin cycloid is examined. The anisotropic interactions responsible for the formation of nanostructures in the form of spin vortices (skyrmions) in MnSi and Cu2OSeO3 are analyzed.

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Доп.точки доступа:
Rudenko, V. V.; Руденко, Валерий Васильевич; Овчинников, Сергей Геннадьевич; Program of Federal Support for Leading Scientific Schools of the Russian Federation [NSh 1044.2012.2]; President's Program of Support for Leading Scientific Schools [NSh-2886.2014.2]; Russian Foundation for Basic Research [13-02-00358]

/ S. Y. Vetrov, P. S. Pankin, I. V. Timofeev // Phys. Wave Phenom. - 2015. - Vol. 23, Is. 1. - P. 35-38, DOI 10.3103/S1541308X15010057. - Cited References:8. - This work was carried out within Research Government Contract No. 3.1276.2014/K for 2014 between the Ministry of Education and Science of the Russian Federation and Siberian Federal University and supported by the RFBR Project 14-02-31248, and a joint project of the Siberian Branch of the Russian Academy of Sciences and the Ministry of Science and Technology of Taiwan. . - ISSN 1541. - ISSN 1934-807X. - РУБ Physics, Multidisciplinary

Аннотация: The spectral properties of a one-dimensional photonic crystal with a structure defect-anisotropic nanocomposite layer incorporated between two multilayer dielectric mirrors-have been theoretically investigated. Some specific features are revealed in the transmission spectrum of a photonic crystal. They are primarily due to the resonant behavior of the effective permittivity of nanocomposite and the strong dependence of this parameter on the volume fraction of nanoparticles in the composite.

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Держатели документа:
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; Ministry of Education and Science of the Russian Federation [3.1276.2014/K]; Siberian Federal University [3.1276.2014/K]; RFBR [14-02-31248]; Siberian Branch of the Russian Academy of SciencesMinistry of Science and Technology of Taiwan

/ 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 1012-0394РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

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.

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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)

/ 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
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.

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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)

/ S. Y. Vetrov, P. S. Pankin, I. V. Timofeev // Quantum Electron. - 2014. - Vol. 44, Is. 9. - P. 881-884, DOI 10.1070/QE2014v044n09ABEH015473. - Cited References: 22. - The work was partially supported by the SB RAS programme (Grant Nos 43, 101 and 24.29); the Russian Foundation for Basic Research (Grant No. 14-02-31248); the Government Programme of the Ministry of Education and Science of the Russian Federation (Project No. 1276); RF President's Grants Council for the State Support to Young Russian Scientists (No. MK-250.2013.2); and NSCT-SB RAS joint project. . - ISSN 1063-7818. - ISSN 1468-4799РУБ Engineering, Electrical & Electronic + Physics, Applied

Аннотация: We have studied the spectral properties of a one-dimensional photonic crystal with a structure defect that represents an anisotropic nanocomposite layer sandwiched between two multi-layer dielectric mirrors. The nanocomposite consists of metallic nanoscale inclusions of orientationally ordered spheroidal shape, dispersed in a transparent matrix, and is characterised by an effective resonant permittivity. Each of the two orthogonal polarisations of probe radiation corresponds to a particular plasmon resonant frequency of the nanocomposite. The problem of calculating the transmittance spectrum of the waves with s- and p-polarisations for such structures is solved. Spectral manifestation of splitting of the defect mode depending on the structure parameters and volumetric fraction of the nanospheroids is studied. The essential dependence of the position of maxima of the defect modes in the bandgap of the photonic crystal and their splitting on the incidence angle, polarisation, and the ratio of lengths of the polar and equatorial semi-axes of the spheroidal nanoparticles is shown.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Pankin, P. S.; Timofeev, I. V.; Тимофеев, Иван Владимирович; Ветров, Степан Яковлевич; SB RAS programme [43, 101, 24.29]; Russian Foundation for Basic Research [14-02-31248]; Government Programme of the Ministry of Education and Science of the Russian Federation [1276]; RF President's Grants Council [MK-250.2013.2]; NSCT-SB RAS joint project

/ I. V. Timofeev, S. Y. Vetrov // Bull. Russ. Acad. Sci. Phys. - 2014. - Vol. 78, Is. 12. - P. 1308-1312, DOI 10.3103/S1062873814120296. - Cited References: 11. - This work was supported by Russian Ministry of Education and Science under the Government program, Project No. 3.1276.2014/K; by the Presidium of the Russian Academy of Sciences, grant nos. 24.29, 24.31; by the Russian Academy of Sciences’ Department of Physical Sciences, grant no. III.9.5; by the Siberian Branch of the Russian Academy of Sciences, grant nos. 43, 101; by the Russian Foundation for . - ISSN 1062-8738
Аннотация: New boundary conditions for the decoupling of elliptically polarized eigenmodes in an anisotropic optical cavity are proposed. It is shown that twisting the optical axis changes the phase shift of the waves. The difference between the effective refraction indices is greater than the one between ordinary and extraordinary refraction indices.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of SciencesKrasnoyarsk, Russian Federation
Siberian Federal UniversityKrasnoyarsk, Russian Federation

Доп.точки доступа:
Vetrov, S. Ya.; Ветров, Степан Яковлевич; Тимофеев, Иван Владимирович

/ V. V. Val'kov, M. S. Shustin // Spin Waves 2015, Int. Simp. : abstracts. - 2015. - P. 124
   Перевод заглавия: Спин-волновая теория анизотропного двухподрешеточного одноцепочечного магнетика {[FeIII(Tp*)(CN)3]2FeII(bpmh)}ћ2H2O

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Доп.точки доступа:
Shustin, M. S.; Шустин, Максим Сергеевич; Вальков, Валерий Владимирович; International Symposium on Spin Waves(2015 ; jun. ; 7-13 ; Saint Petersburg); Физико-технический институт им. А.Ф. Иоффе РАН

/ I. V. Timofeev [et al.] // Phys. Rev. E. - 2015. - Vol. 92, Is. 5. - Ст. 052504, DOI 10.1103/PhysRevE.92.052504. - Cited References: 92. - This work was supported in part by Russian Foundation for Basic Research Grants No. 14-02-31248 and No. 15-02-06924; Ministry of Education and Science of the Russian Federation under the Government program, Project No. 3.1276.2014/K; and the Ministry of Science and Technology of Taiwan under Grant No. NSC 103-2923-M-009-003-MY3 through an NSC–SB RAS joint project . - ISSN 1539-3755РУБ Physics, Fluids & Plasmas + Physics, Mathematical

Аннотация: Anomalous spectral shift of transmission peaks is observed in a Fabry-Pérot cavity filled with a chiral anisotropic medium. The effective refractive index value resides out of the interval between the ordinary and the extraordinary refractive indices. The spectral shift is explained by contribution of a geometric phase. The problem is solved analytically using the approximate Jones matrix method, numerically using the accurate Berreman method, and geometrically using the generalized Mauguin-Poincaré rolling cone method. The o-mode blueshift is measured for a 4-methoxybenzylidene-4′-n-butylaniline twisted-nematic layer inside the Fabry-Pérot cavity. The twist is electrically induced due to the homeoplanar-twisted configuration transition in an ionic-surfactant-doped liquid crystal layer. Experimental evidence confirms the validity of the theoretical model. © 2015 American Physical Society.

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Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Laboratory for Nonlinear Optics and Spectroscopy, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Imaging and Biomedical Photonics, College of Photonics, National Chiao Tung University, Guiren District, Tainan, Taiwan

Доп.точки доступа:
Timofeev, I. V.; Тимофеев, Иван Владимирович; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Lee, W.; Zyryanov, V. Ya.; Зырянов, Виктор Яковлевич
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/ V. V. Val'kov, M. S. Shustin // J. Exp. Theor. Phys. - 2015. - Vol. 121, Is. 5. - P. 860-877, DOI 10.1134/S1063776115110175. - Cited References:46. - This work was supported by the Russian Foundation for Basic Research, project nos. 13-02-00523, 14-02-31237, and 15-42-04372 . - ISSN 1063-7761. - ISSN 1090-6509РУБ Physics, Multidisciplinary

Аннотация: The dispersion equation of a strongly anisotropic one-dimensional magnet catena-[FeII(ClO4)2{FeIII(bpca)2}]ClO4 containing alternating high-spin (HS) (S = 2) and low-spin (LS) (S = 1/2) iron ions is obtained by the diagram technique for Hubbard operators. The analysis of this equation yields six branches in the excitation spectrum of this magnet. It is important that the crystal field for ions with spin S = 2 is described by the Hamiltonian of single-ion easy-plane anisotropy, whose orientation is changed by 90° when passing from one HS iron ion to another. The U(N) transformation technique in the atomic representation is applied to diagonalize a single-ion Hamiltonian with a large number of levels. It is shown that the modulation of the orientation of easy magnetization planes leads to a model of a ferrimagnet with easy-axis anisotropy and to the formation of energy spectrum with a large gap. For HS iron ions, a decrease in the mean value of the spin projection due to quantum fluctuations is calculated. The analysis of the specific features of the spectrum of elementary excitations allows one to establish a correspondence to a generalized Ising model for which the magnetic susceptibility is calculated in a wide range of temperatures by the transfer-matrix method. The introduction of a statistical ensemble that takes into account the presence of chains of different lengths and the presence of iron ions with different spins allows one to describe the experimentally observed modification of the magnetic susceptibility of the magnet under optical irradiation.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Shustin, M. S.; Шустин, Максим Сергеевич; Вальков, Валерий Владимирович; Russian Foundation for Basic Research [13-02-00523, 14-02-31237, 15-42-04372]