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Перегляд Відділення фізики і астрономії за назвою

Репозиторій DSpace/Manakin

Перегляд Відділення фізики і астрономії за назвою

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  • V407 Cyg and RS Oph - comparison of two exotic variables 
    Drozd, K.; Swierczynski, E.; Ragan, E.; Buil, C. (Advances in Astronomy and Space Physics, 2013)
    V407 Cygni and RS Ophiuchi are two similar but unique objects. It can be said that they each belong to an individual type of stars. During their quiet state they seem to be symbiotic stars. However, both stars have previously ...
  • V407 Cygni - nova like outburst in symbiotic system 
    Drozd, K.; Swierczynski, E.; Ragan, E. (Advances in Astronomy and Space Physics, 2012)
    We presented spectroscopic and photometric observations of V407 Cygni obtained during 2006-2011. Our data shows the different activity stages connected with the two components of this symbiotic binary system. Cool giant ...
  • Vacancy Formation Energy for the Charged and Neutral States of TlGaSe₂ Crystal 
    Ismayilova, N.A.; Orudzhev G.S. (Металлофизика и новейшие технологии, 2017)
    Electronic band structure and defect formation energy of TlGaSe₂ are studied using density functional method within the Local Density Approximation.
  • Vacuum method for creation of liquid crystal orienting microrelief 
    Kolomzarov, Yu.; Oleksenko, P.; Sorokin, V.; Tytarenko, P.; Zelinskyy, R. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2003)
    A mechanism for creation of microrelief surface anisotropy of amorphous films oxides materials which are obtained by oblique reactive cathode sputtering method is described. The influence of technological parameters of ...
  • Vacuum polarization in graphene with a topological defect 
    Sitenko, Yu.A.; Vlasii, N.D. (Физика низких температур, 2008)
    The influence of a topological defect in graphene on the ground state of electronic quasiparticle excitations is studied in the framework of the long-wavelength continuum model originating in the tightbinding approximation ...
  • Vadim Loktev's 70th birthday 
    Автор відсутній (Condensed Matter Physics, 2015)
    This year Vadim Loktev, a well-known scientist, prominent theoretical physicist, talented lecturer, organizer of scientific research and activity celebrates his 70th birthday.
  • Valence fluctuations in Sn(Pb)₂P₂S₆ ferroelectrics 
    Yevych, R.; Haborets, V.; Medulych, M.; Molnar, A.; Kohutych, A.; Dziaugys, A.; Banys, Ju.; Vysochanskii, Yu. (Физика низких температур, 2016)
    The valence fluctuations which are related to the charge disproportionation of phosphorous ions P⁴⁺+P⁴⁺→P³⁺+P⁺⁵ are the origin of ferroelectric and quantum paraelectric states in Sn(Pb)₂P₂S₆ semiconductors. They involve ...
  • Valentin Peschansky and puzzles of magnetotransport 
    Pudalov, V.M. (Физика низких температур, 2011)
    Starting from the 1950s, the Kharkov school of theoretical physics was one of the world leaders in the theory of metals. In particular, the research by V.G. Peschansky for many years was focused on studying the relationship ...
  • Valentin Peschansky and puzzles of magnetotransport 
    Slobodeniuk, A.O.; Sharapov, S.G.; Loktev, V.M. (Физика низких температур, 2011)
    We study two-dimensional electronic gas (2DEG) in the background of the Aharonov–Bohm and constant magnetic fields. The problem of ambiguity of the solutions of the Schrödinger equation is investigated by introducing a ...
  • Validity of t–J approximation for extended Hubbard model with strong repulsion 
    Cheranovskii, V.O.; Klein, D.J.; Ezerskaya, E.V.; Tokarev, V.V. (Физика низких температур, 2018)
    It is shown that for finite cyclic systems described by two band Hubbard Hamiltonian with strong electron repulsion the reduction to effective t–J model may give incorrect description of the ground state symmetry due to ...
  • Validity of t–J approximation for extended Hubbard model with strong repulsion 
    Cheranovskii, V.O.; Klein, D.J.; Ezerskaya, E.V.; Tokarev, V.V. (Физика низких температур, 2017)
    It is shown that for finite cyclic systems described by two band Hubbard Hamiltonian with strong electron repulsion the reduction to effective t–J model may give incorrect description of the ground state symmetry due to ...
  • Van der Waals interaction between surface and particle with giant polarizability 
    Makhnovets, K.A. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2016)
    We show that a nanoparticle with a “giant” polarizability α (i.e., with the polarizability volume α′ = α/4πε₀ significantly exceeding the particle volume) placed in the vicinity of a surface experiences a strongly increased ...
  • Variable range hopping in thin film with large dielectric constant 
    Shklovskii, B.I. (Физика низких температур, 2017)
    In a film with large dielectric constant κ the electric field of an electron spreads inside the film before exiting the film at large distances of order of κ d ( d is the film width). This leads to the logarithmic Coulomb ...
  • Variational approach to the calculation of the lowest Wannier exciton state in wide type-II single semiconductor quantum wells 
    Vertsimakha, G.V. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2016)
    The possibility to change the spatial character of the Wannier exciton ground state in a wide single type-II semiconductor quantum well has been studied variationally. A heterostructure with the central layer forming a ...
  • Variational approach to the problem of energy spectrum of surface electrons over liquid-helium film 
    Sokolov, S.S. (Физика низких температур, 2004)
    The energies of first two subbands are calculated, within a variational approach, for electrons localized over the surface of a liquid-helium film covering a solid substrate. The results are obtained for arbitrary value ...
  • Variational two-particle wave equation in scalar quantum field theory 
    Darewych, J. (Condensed Matter Physics, 2000)
    We study two-particle systems in a model quantum field theory, in which scalar particles of different mass interact via a mediating scalar field. The Lagrangian of the model is reformulated using covariant Green's functions to ...
  • Variation of optical parameters of multilayer structures with thin silicon layers at laser annealing 
    Okhrimenko, O.B. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2014)
    The experimental data on Raman scattering (RS) and optical absorption in structures with thin silicon layers on various substrates, as well as in multilayer quartz/Si/SiO₂, SiC/Si/SiO₂ and glass/Si₃N₄/Si/SiO₂ structures, ...
  • Variation of Subharmonic Function under Transformation of its Riesz Measure 
    Kudasheva, E.G.; Khabibullin, B.N. (Журнал математической физики, анализа, геометрии, 2007)
    The paper combines two aspects. First, it contains a compressed com- parative review of the well-known results on the change of growth of entire (subharmonic resp.) function under the shifts of its zeros (under T-shift of ...
  • Variations of the energy spectra of solar X-ray flares: interconnection with the photospheric, chromospheric, and magnetic activity of the Sun (1972−2001) 
    Kasinskii, V. (Кинематика и физика небесных тел, 2005)
    The problem of flare energy distribution of the Sun is strongly related to the power-law energy spectra of flares on the UV Ceti-type stars. In a preliminary study (1972–1993), the X-ray flare integral energy spectrum (IES) ...
  • Variations of the quasar radio spectra with period 130 h⁻¹ Mpc 
    Khodyachikh, M. (Кинематика и физика небесных тел, 2005)
    It is known that the spatial distribution of galaxies and quasars is structured at a scale LS = 130 h⁻¹Mpc. The same scale can be present at a spatial distribution of the physical characteristics of quasars. The search of ...

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