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Frontiers of physics 2012年第1期7卷 3-7页

作者： Kolovsky, Andrey R. kirensky institute of physics Siberian Branch of Russian Academy of Sciences Krasnoyarsk Russia institute of Engineering physics Siberian Federal University Krasnoyarsk Russia

Quantum dynamics of a charged particle in a two-dimensional （2D） lattice subject to magnetic and electric fields is a rather complicated interplay between cyclotron oscillations （the case of vanishing electric field） and Bloch oscillations （zero magnetic field）, details of which has not yet been com- pletely understood. In the present work we suggest to study this problem by using cold atoms in optical lattices. We introduce a one-dimensional （1D） model which can be easily realized in labora- tory experiments with quasi-lD optical lattices and show that this model captures many features of the cyclotron-Bloch dynamics of the quantum particle in 2D square lattices.

关键词： optical lattice Bloch dynamics cyclotron oscillations cold atoms

Effect of local environment in resonant domains of polydisperse plasmonic nanoparticle aggregates on optodynamic processes in pulsed laser fields

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Chinese physics B 2015年第4期24卷 467-474页

作者： A.E.Ershov A.P.Gavrilyuk S.V.Karpov P.N.Semina L.V.kirensky institute of physics Russian Academy of Sciences institute of Computational Modeling Russian Academy of Sciences siberian State Aerospace university siberian federal university

Interactions of pulsed laser radiation with resonance domains of multiparticle colloidal aggregates having an increasingly complex local environment are studied via an optodynamic model. The model is applied to the simplest configurations, such as single particles, dimers, and trimers consisting of mono- and polydisperse Ag nanoparticles. We analyze how the local environment and the associated local feld enhancement by surrounding particles affect the optodynamic processes in domains, including their photomodification and optical properties.

关键词： nanoparticle surface plasmon colloid aggregate optodynarnics

Spin States of 2D Nanocomposites of Ni and V Nanoclusters on Hexagonal h-BN, BC_3 and Graphene

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Journal of Materials Science & Technology 2015年第10期31卷 979-985页

作者： P.Avramov A.A.Kuzubov S.Sakai S.Entani H.Naramoto N.Eliseeva Kyungpook National university siberian federal university L.V.kirensky institute of physics SB RAS Advanced Science Research Center Japan Atomic Energy Agency

Atomic and electronic structures of adsorbed nickel and vanadium atoms and nanoclusters （Nin and Vn, n = 1-10） on hexagonal h-BN and BC3 lattices were studied using DFT PBE/PBC/PW （Perdew-Burke- Ernzerhof potential of density functional theory/periodic boundary conditions/plane wave basis set） technique. For the sake of comparison the structure and properties of the same nanoclusters deposited on pristine graphene were calculated as well. It was found that for all types of supports an increase of n from 1 to 10 leaded to decrease of coordination types from 776 to r/2 and 771. The h-BN- and BC3-based nanocomposites were characterized by high （up to 18 μ for Ni10/BC3） magnetic moments of the nanoclusters and featured by positive binding energies. The graphene-based nanocomposites revealed energetic stability and, in general, lower magnetic moments per unit cell. The direct potential energy barriers for migration of Ni η2/η21 and η6/η6 types of dimers on graphene were low （10.9-28.9 kJ/mol） with high reverse barriers for η6/η6 dimers, which favored dynamically equilibrated Ni clusterization on graphene.

关键词： Electronic structureMetal nanostructure Nanocomposites Grapheneh-BNBC3 Spin states

Processes underlying the laser photochromic effect in colloidal plasmonic nanoparticle aggregates

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Chinese physics B 2020年第3期29卷 412-419页

作者： A E Ershov V S Gerasimov I L Isaev A P Gavrilyuk S V Karpov institute of Computational Modeling SB RAS 660036KrasnoyarskRussia siberian federal university Krasnoyarsk660041Russia kirensky institute of physics Federal Research Center KSC SB RAS660036KrasnoyarskRussia siberian State university of Science and Technology Krasnoyarsk 660014Russia

We have studied the dynamic and static processes occurring in disordered multiparticle colloidal Ag aggregates with natural structure and affecting their plasmonic absorption spectra under pico-and nanosecond pulsed laser radiations, as well as the physical origin responsible for these processes. We have shown that depending on the duration of the laser pulse,the mechanisms of laser modification of such aggregates can be associated both with changes in the resonant properties of the particles due to their heating and melting(picosecond irradiation mode) and with the particle shifts in the resonant domains of the aggregates(nanosecond pulses) which depend on the wavelength, intensity, and polarization of the *** mechanisms result in formation of a narrow dip in the plasmonic absorption spectrum of the aggregates near the laser radiation wavelength and affect the shape and position of the dip. The effect of polydispersity of nanoparticle aggregates on laser photochromic reaction has been studied.

关键词： nanoparticle surface plasmon resonance photochromic process pulsed laser radiation

Restructuring of plasmonic nanoparticle aggregates with arbitrary particle size distribution in pulsed laser fields

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Chinese physics B 2016年第11期25卷 563-570页

作者： A E Ershov A P Gavrilyuk S V Karpov S P Polyutov institute of Computational Modeling Russian Academy of SciencesKrasnoyarsk 660036Russia L.V.kirensky institute of physics of the Russian Academy of Sciences Krasnoyarsk 660036Russia siberian federal university Krasnoyarsk 660028Russia siberian State Aerospace university Krasnoyarsk 660037Russia

We have studied processes of interaction of pulsed laser radiation with resonant groups of plasmonic nanoparticles（resonant domains） in large colloidal nanoparticle aggregates having different interparticle gaps and particle size *** processes are responsible for the origin of nonlinear optical effects and photochromic reactions in multiparticle *** describe photo-induced transformations in resonant domains and alterations in their absorption spectra remaining after the pulse action,we introduce the factor of spectral *** on calculation of changes in thermodynamic,mechanical,and optical characteristics of the domains,the histograms of the spectrum photomodification factor have been obtained for various interparticle gaps,an average particle size,and the degree of *** in spectra have been analyzed depending on the intensity of laser radiation and various combinations of size characteristics of *** obtained results can be used to predict manifestation of photochromic effects in composite materials containing different plasmonic nanoparticle aggregates in pulsed laser fields.

关键词： resonant arbitrary pulsed dipole manifestation alterations extinction remaining aggregate colloidal

Soft modes condensation in Raman spectra of(Pb-La)(Zr-Sn-Ti)O_(3)ceramics

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Journal of Advanced Dielectrics 2019年第3期9卷 25-28页

作者： Alexander N.Vtyurin Alexander S.Krylov Svetlana N.Krylova Alexander S.Oreshonkov Xiaoyong Wei Yujun Feng Ran Xu Tian Zhao kirensky institute of physics&siberian federal university Krasnoyarsk 660036Russia Electronic Materials Research Laboratory&Intl.Center for Dielectric Research Xi’an 710049P.R.China

Low frequency Raman spectra of(Pb_(0.97)La_(0.02)T(Zr_(0.864)Sn_(0.04)Ti_(0.096))O_(3)ceramic samples have been studied near cubic to antiferroelectric phase transition at about 200℃.A set of low frequency soft modes were observed restoring below the transition point,in addition to the known one above 100 cm^(-1).These modes show strong damping anomalies at the transition point that supposes considerable intermode interactions via dampings.

关键词： PZT ceramics phase transition Raman scattering soft mode

The combined effect of optical laser and microwave radiations on a metal surface

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Chinese physics B 2014年第2期23卷 359-363页

作者： Anatoli P Gavrilyuk Nikolai Ya Shaparev institute of Computational Modeling of siberian Branch of Russian Academy of Sciences Akademgorodok siberian federal university

In this paper, it is shown that the laser radiation intensity required for complete ionization of vapors produced on an irradiated metal surface can be reduced by more than an order of magnitude through using pulsed l... 详细信息

关键词： laser microwave radiation metal surface plasma

Giant magnetoresistance in Fe/SiO_2/p-Si hybrid structure under non-equilibrium conditions

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Transactions of Nonferrous Metals Society of China 2014年第10期24卷 3158-3163页

作者： N.V.VOLKOV A.S.TARASOV A.O.GUSTAJCEV O.N.VOLKOVA S.N.VARNAKOV S.G.OVCHINNIKOV kirensky institute of physics Russian Academy of SciencesSiberian Branch Krasnoyarsk 660036 Russia institute of Engineering physics and Radio Electronics Siberian Federal University Krasnoyarsk 660041 Russia institute of Engineering physics and Radio Electronics Siberian Federal University Krasnoyarsk 660041Russia

The giant magnetoresistive（MR） effect was investigated in a simple Fe/Si O2/p-Si-hybrid-structure-based device from two back-to-back Schottky diodes. The effect was revealed only under the non-equilibrium conditions caused by optical radiation. It is demonstrated that the magnetoresistance ratio attains 100 or more. The main peculiarity of the MR behavior is its strong dependence on the magnitude and the sign of the bias current across the device and, most surprisingly, upon polarity of the magnetic field. It is important that the magnetoresistive effect is implemented exclusively in the subsystem of minority charge carriers transferred to the non-equilibrium states. The development of magneto-sensitive devices of this type can give grounds for a novel direction of semiconductor spintronics.

关键词： magnetoresistance hybrid structure Schottky diode

Negative thermal expansion in one-dimension of a new double sulfate AgHo(SO_(4))_(2)with isolated SO_4 tetrahedra

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Journal of Materials Science & Technology 2021年第17期76卷 111-121页

作者： Yuriy G.Denisenko Victor V.Atuchin Maxim S.Molokeev Naizheng Wang Xingxing Jiang Aleksandr S.Aleksandrovsky Alexander S.Krylov Aleksandr S.Oreshonkov Alexander E.Sedykh Svetlana S.Volkova Zheshuai Lin Oleg V.Andreev Klaus Müller-Buschbaum institute of Chemistry Tyumen State University.Tyumen625003Russia institute of Inorganic and Analytical Chemistry Justus-Liebig-University of Giessen35392Giessen.Germany Department of General and Special Chemistry Industrial University of TyumenTyumen625000Russia Laboratory of Optical Materials and Structures Institute of Semiconductor PhysicsSB RASNovosibirsk630090Russia Laboratory of Semiconductor and Dielectric Materials Novosibirsk State UniversityNovosibirsk630090Russia Research and Development Department.Kemerovo State university Kemerovo650000Russia Laboratory of Crystal physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia siberian federal university Krasnoyarsk660041Russia Department of physics Far Eastern State Transport UniversityKhabarovsk680021Russia Technical institute of physics and Chemistry Chinese Academy of SciencesBeijing100190China Laboratory of Coherent Optics Kirensky Institute of Physics.Federal Research Center KSC SB RASKrasnoyarsk660036Russia institute of Nanotechnology Spectroscopy and Quantum ChemistrySiberian Federal UniversityKrasnoyarsk660041Russia Laboratory of Molecular Spectroscopy Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk660036Russia Center for Materials Research(LaMa) Justus-Liebig-University GiessenGiessen35392Germany university of the Chinese Academy of Sciences Beijing100049China Laboratory of the Chemistry of Rare Earth Compounds Institute of Solid State ChemistryUB RASEkaterinburg620137Russia

A double holmium-silver sulfate was obtained for the first *** temperature intervals for the formation and stability of the compound were determined by differential scanning *** crystal structure of AgHo(SO_(4))_(2)was determined by Rietveld *** X-ray diffraction(XRD)analysis showed that the compound crystallizes in the monoclinic syngony,space group P2_1/m,with the unit cell parameters a=4.71751(4)A,b=6.84940(6)A and c=9.89528(9)A,β=95.1466(4)·,V=318.448(5)A^(3),Z=2,R_B=1.55%,T=303 *** types of sulfate tetrahedra were found in the structure,which significantly affected the spectral properties in the infrared *** the temperature range of 143-703 K,a negative thermal expansion along the b direction accompanied by a positive thermal expansion along the a and c directions was *** was established that negative thermal expansion is the result of the deformation of sulfate tetrahedra,which is affected by the movement of holmium and silver *** excitation in the blue spectral range(457.9 nm)produces a luminescence in light blue(489 nm),green(545 nm)and red(654 nm)spectral ranges,and the latter two were of comparable intensity that is favorable for WLED *** observed luminescent band distribution is ascribed to the specific crystal field at Ho^(3+)ion sites rather than a variation of radiationless probability.

关键词： Sulfate Crystal structure Thermal expansion Raman Photoluminescence Band structure

Lattice distortion generates bound states in the continuum

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Science China(physics,Mechanics & Astronomy) 2024年第3期67卷 166-166页

作者： Almas Sadreev kirensky institute of physics Federal Research Center KSC Siberian BranchRussian Academy of SciencesKrasnoyarsk 660036Russia

High-Q optical cavity is an indispensable component of many photonic devices, such as lasers, sensors, harmonic generation and photon emission, and chiral *** way of realizing ultrahigh Q-factor relies on Fabry-Pérot... 详细信息

关键词： Lattice distortion cavity

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