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  • Articles  (482)
  • Springer  (482)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • Cell Press
  • National Academy of Sciences
  • 2015-2019  (482)
  • 2005-2009
  • 1980-1984
  • 2017  (482)
  • Physics of the Solid State  (98)
  • 811
  • Physics  (482)
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  • Articles  (482)
Publisher
  • Springer  (482)
  • American Chemical Society (ACS)
  • American Geophysical Union
  • Cell Press
  • National Academy of Sciences
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  • 2015-2019  (482)
  • 2005-2009
  • 1980-1984
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  • Physics  (482)
  • 1
    Publication Date: 2017-02-21
    Description: The recently obtained equation for the dependence of the glass transition temperature on the cooling rate of a melt has been considered and compared with the experimental data. The kinetic criterion of glass transition has been discussed.
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    Electronic ISSN: 1090-6460
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  • 2
    Publication Date: 2017-02-21
    Description: An epitaxial 1–3-μm-thick cadmium telluride film has been grown on silicon with a buffer silicon carbide layer using the method of open thermal evaporation and condensation in vacuum for the first time. The optimum substrate temperature was 500°C at an evaporator temperature of 580°C, and the growth time was 4 s. In order to provide more qualitative growth of cadmium telluride, a high-quality ~100-nm-thick buffer silicon carbide layer was previously synthesized on the silicon surface using the method of topochemical substitution of atoms. The ellipsometric, Raman, X-ray diffraction, and electron-diffraction analyses showed a high structural perfection of the CdTe layer in the absence of a polycrystalline phase.
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  • 3
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    Springer
    Publication Date: 2017-02-21
    Description: The components of the elastooptic tensor of graphenes with the sp 2 hybridization of atomic orbitals for the visible and near infrared spectral regions are calculated. These components are shown to be comparable with those of lithium niobate.
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  • 4
    Publication Date: 2017-02-21
    Description: The applicability of individual Ni, Cu, Au, Pt, and Pd nanoclusters as data bits in next generation memory devices constructed on the phase-change carrier principle is studied. To this end, based on the modified tight-binding potential (TB-SMA), structure formation from the melt of nanoparticles of these metals to 10 nm in diameter was simulated by the molecular dynamics method. The effect of various crystallization conditions on the formation of the internal structures of Ni, Cu, Au, Pt, and Pd nanoclusters is studied. The stability boundaries of various crystalline isomers are analyzed. The obtained systematic features are compared for nanoparticles of copper, nickel, gold, platinum, and palladium of identical sizes. It is concluded that platinum nanoclusters of diameter D 〉 8 nm are the best materials among studied metals for producing memory elements based on phase transitions.
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  • 5
    Publication Date: 2017-05-21
    Description: Local deformations of the crystal lattice under ultrasonic loading over a wide range of amplitudes have been investigated by means of recording the X-ray rocking curves for paratellurite and lithium fluoride single crystals.
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  • 6
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    Springer
    Publication Date: 2017-05-21
    Description: A theory for propagation of polaritons in superlattices with resonant plasmon-exciton coupling is presented. A periodical superlattice consists of a finite number of cells with closely located a quantum well and a monolayer of metal nanoparticles. Under study is the spectrum of hybrid modes formed of the quasitwo- dimensional excitons of quantum wells and the dipole plasmons of metal particles. The problem of electrodynamics is solved by the method of Green’s functions with taking account of the resonant polarization of quantum wells and nanoparticles in a self-consistent approximation. The effective polarizability of spheroidal particles occupying a square lattice is calculated with taking into consideration the local-field effect of dipole plasmons of the layer and their images caused by the excitonic polarization of nearest quantum well. Optical reflection spectra of superlattices with GaAs/AlGaAs quantum wells and silver particles are numerically analyzed. Special attention is paid to the superradiant regime originated in the Bragg diffraction of polaritons in superlattice. Superradiance is investigated separately for plasmons and excitons, and then for hybrid plasmonexcitonic polaritons. It is demonstrated that the broad spectrum of reflectance associated with plasmons depends on the number of cells in superlattice, and it has a narrow spectral dip in the range of plasmon-excitonic Rabi splitting.
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  • 7
    Publication Date: 2017-05-21
    Description: The mechanisms of high-speed deformation of ultrafine-grained copper produced during severe plastic deformation by equal-channel angular pressing were analyzed using numerical modeling in comparison with those in the case of coarse-crystalline copper. The activity of annihilation processes during nonconservative motion and double cross slip of dislocations was estimated. Their effect on the macroscopic behavior of samples is shown.
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  • 8
    Publication Date: 2017-05-21
    Description: The GeO x films and multilayer nanoperiodic Ge/SiO 2 structures containing germanium nanocrystals were prepared by physical vapor deposition in vacuum. The properties of the films and multilayer structures were controlled by varying the deposition temperature in the range of 35–590°C and the annealing temperature in the range of 400–1000°C. A comparative study of the optical and structural characteristics of the nanosystems was performed using the methods of Raman scattering spectroscopy, IR spectroscopy, photoluminescence, and electron microscopy, which demonstrated a qualitative similarity of the nanosystems. It was found that annealing at temperatures in the range of 600–800°C leads to the formation of germanium nanocrystals with a high density (~10 12 cm –2 ), whereas in the materials not subjected to annealing, their density did not exceed ~10 10 cm –2 . The average size of the nanocrystals was found to be 5 ± 2 nm. For both nanosystems, three luminescence bands were observed at 1.2, 1.5–1.7, and 1.7–2.0 eV. It was assumed that the origin of these bands is associated with germanium nanocrystals, oxygen-deficient centers in GeO x , and defects at the Ge/dielectric interface, respectively.
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  • 9
    Publication Date: 2017-05-21
    Description: A method to produce microporous polyvinylidene fluoride films characterized by a high content of a piezoactive crystalline phase and a developed relief surface is elaborated. The porous films are obtained in the process based on melt extrusion with subsequent isometric annealing and uniaxial extension. It is found that the samples have an oriented lamellar structure containing both α- and β-modifications of the crystallites. The effect of temperature and degree of uniaxial extention of the annealed films on the characteristics of the porous samples, that is, the content of the piezoactive crystalline β-phase, overall porosity, breakdown voltage and the piezoelectric modulus is studied.
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  • 10
    Publication Date: 2017-05-21
    Description: Possible phase transitions to the ferromagnetic phase in the LaMn 2 O 3 compound have been studied in the framework of a phenomenological approach based on a symmetry analysis. The conditions that parameters of the thermodynamic potential must satisfy to realize a second-order transition have been found. The line of the first-order phase transitions in this system and the critical point of the second-order phase transition line have been determined. It was shown that a dynamic electric polarization can form in the antiferromagnetic phase.
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