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  • Exciton-enhanced recombination in silicon at high concentrations of charge carriers 
    Sachenko, A.V.; Gorban, A.P.; Kostylyov, V.P. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2000)
    The interrelation between processes of electron-hole recombination and annihilation of excitons in silicon is examined. It is shown, that recombination processes can be essentially influenced by the exciton annihilation ...
  • Excitonic effects in band-edge luminescence of semiconductors at room temperatures 
    Sachenko, A.V.; Kryuchenko, Yu.V. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2000)
    A theoretical analysis is developed for ascertaining the influence of exciton states on edge luminescence in different semiconductors at high temperatures and high levels of excitation. Screening effects and the Mott ...
  • Excitonic Instability and Gap Generation in Monolayer Graphene 
    Gamayun, O.V.; Gorbar, E.V.; Gusyn, V.P. (2010)
    We analyze the excitonic instability in graphene by solving the Bethe–Salpeter equation for the electron-hole bound state. In the supercritical regime, we show that this equation has a tachyon in its spectrum. We argue ...
  • Excitonic photoconductivity of heterostructures based on gallium and indium selenides 
    Katerynchuk, V.M.; Kovalyuk, Z.D.; Tkachuk, I.G. (Functional Materials, 2017)
    Present spectra of photosensitivity of various types of heterojunctions based on layered crystals A³B⁶ made of the Van der Waals connection of pairs on heteromer as well as covalent. We also discuss the features of excitonic ...
  • Exciton in closed and opened quantum dot 
    Tkach, M.V.; Seti, Ju.O. (Condensed Matter Physics, 2007)
    The theory of exciton spectrum in spherically symmetric states for the three- shell closed spherical quantum dot is proposed. The evolution of the exciton spectrum while varying the outer well thickness from zero (stationary ...
  • Exciton-induced lattice defect formation 
    Savchenko, E.V.; Ogurtsov, A.N.; Zimmerer, G. (Физика низких температур, 2003)
    The lattice defect formation in solid Ne induced by electronic excitation was studied using the selective vacuum ultraviolet spectroscopy method. The samples were excited with synchrotron radiation in the range of excitonic ...
  • Exciton migration in pseudoisocyanine J-aggregates formed in polymer films 
    Sorokin, A.V.; Gnap, B.A.; Fylymonova, I.I.; Yefimova, S.L. (Functional Materials, 2012)
    Exciton transport efficiency in pseudoisocyanine (PIC) J-aggregates formed in PVA thin film has been studied using an exciton trap. As a trap, anionic cyanine dye DiD-C3S has been used. Luminescence spectra have been ...
  • Exciton–polariton laser 
    Moskalenko, S.A.; Tiginyanu, I.M. (Физика низких температур, 2016)
    We present a review of the investigations realized in the last decades of the phenomenon of the Bose–Einstein condensation (BEC) in the system of two-dimensional cavity polaritons in semiconductor nanostructures. The ...
  • Exciton relaxation in KBr and CaF₂ at low temperature: molecular dynamics study 
    Song, K.S. (Физика низких температур, 2003)
    We report here recent study of molecular dynamics simulation of exciton relaxation in several ionic crystals at low temperature. Both the lowest energy spin triplet and some of the low lying hole excited states are allowed ...
  • Excitons and trions in spherical semiconductor quantum dots 
    Kupchak, I.M.; Kryuchenko, Yu.V.; Korbutyak, D.V. (Semiconductor Physics Quantum Electronics & Optoelectronics, 2006)
    An original iterative procedure has been developed to obtain energy spectrum of neutral and charged excitons (positive and negative trions) in spherical semiconductor quantum dots (QD) imbedded into a dielectric material. ...
  • Exciton self-trapping into diatomic and triatomic molecular complexes in xenon cryocrystals 
    Ogurtsov, A.N.; Savchenko, E.V.; Sombrowski, E.; Vielhauer, S.; Zimmerer, G. (Физика низких температур, 2003)
    The recent study of molecular trapped centers in Xe cryocrystals was extended on triatomic self-trapped excitons. Time- and spectrally-resolved molecular luminescence was measured in the temperature range 5–60 K. The ...
  • Excitons in Nanosystems Consisting of Semiconductor Quantum Dots 
    Pokutnyi, S.I.; Gorbyk, P.P.; Makhno, S.M.; Prokopenko, S.L.; Mazurenko, R.V. (Наносистеми, наноматеріали, нанотехнології, 2017)
    As found, within the band gap of the quantum dot of zinc selenide, a zone of exciton states located at the bottom of the conduction band appears. As shown, a decrease in the band gap width for this nanosystem is conditioned ...
  • Excitons into one-axis crystals of zinc phosphide (Zn₃P₂) 
    Stepanchikov, D.M.; Chuiko, G.P. (Condensed Matter Physics, 2009)
    Theoretical study of excitons spectra is offered in this report as for Zn₃P₂ crystals. Spectra are got in the zero approach of the theory of perturbations with consideration of both the anisotropy of the dispersion law and ...
  • Exciton spectrum in multi-shell hexagonal semiconductor nanotube 
    Makhanets, O.M.; Gutsul, V.I.; Tsiupak, N.R.; Voitsekhivska, O.M. (Condensed Matter Physics, 2012)
    The theory of exciton spectrum in multi-shell hexagonal semiconductor nanotube is developed within the effective masses and rectangular potentials approximations using the method of effective potential. It is shown that ...
  • Exclusion of chromosomal abnormalities and microdeletions 22q11 and 10p13 in Algerian patients with isolated conotruncal malformation 
    Ammar-Khodja, F.; Abdellali, M. (Цитология и генетика, 2015)
    The chromosomal abnormalities of number and structure or the 22q11.2 and 10p13-14 microdeletions are considered the main causes of congenital heart disease. In our best knowledge, cytogenetics studies on congenital heart ...
  • Execution of replication in heterogeneous database systems 
    Khadzhynov, W.; Maksymiuk, M. (Реєстрація, зберігання і обробка даних, 2006)
    Database replication is a mechanism which allows distributed databases stay in synchronized and consistent state. In heterogeneous case there is a set of databases with different platforms, what additionally complicates ...
  • Existence and asymptotic behavior of the positive solutions of neutral impulsive differential equations 
    Dimitrova, M.B.; Donev, V.I. (Нелінійні коливання, 2005)
    In this article we consider first order neutral impulsive differential equations with constant coefficients and constant delays. We study the asymptotic behavior of the eventually positive solutions of these equations and ...
  • Existence and attractivity results for Hilfer fractional differential equations 
    Abbas, S.; Benchohra, M.; Henderson, J. (Нелінійні коливання, 2018)
    We present some results of the existence of attracting solutions of some fractional differential equations of Hilfer type. The results of the existence of solutions are applied to the Schauder fixed point theorem. We prove ...
  • Existence and attractivity results for nonlinear first order random differential equations 
    Dhage, B.C. (Нелінійні коливання, 2011)
    In this paper, the existence and attractivity results are proved for nonlinear first order ordinary random differential equations. An example is indicated to demonstrate a realization of the abstract theory developed in ...
  • Existence and Construction of Vessiot Connections 
    Fesser, D.; Seiler, W.M. (Symmetry, Integrability and Geometry: Methods and Applications, 2009)
    A rigorous formulation of Vessiot's vector field approach to the analysis of general systems of partial differential equations is provided. It is shown that this approach is equivalent to the formal theory of differential ...