2005: Recent submissions

  • Large polarons in semiconductor nanostructures 
    DEVREESE, J. T. (Technical University of Moldova, 2005)
    I present an overview is presented of the fundamentals of large-polaron physics, which provide the basis of the analysis of polaron effects in semiconductor nanostructures. The emphasis is on the polaron optical absorption. ...
  • Silicon nanocluster in silicon dioxide 
    SOKOLOV, V. I.; ZAMORYANSKAYA, M. V. (Technical University of Moldova, 2005)
    Cathodoluminescence spectra of silicate systems, have two well-known bands associated with native SiO2 defects, namely, a red one peaking at 1.9 eV (twofold-coordinated silicon). The position and intensity of these bands ...
  • About the properties of the heterostructure based on the nano scale layers (In2O3 + 5%Sn) - p – Si at the change of the gas environment 
    IL’CHENKO, V. V.; YUSHCHENKO, A. V.; GUL, R. V.; IL’CHENKO, L. G. (Technical University of Moldova, 2005)
    In this work the properties of the heterostructure (In2O3+5%Sn ) -p-Si with the mass thickness of the nano scale layer about 18 nm at the change of the gas environment from the laboratory atmosphere to the saturated vapor ...
  • Flux flow in superconducting MgB2 films 
    KOCH, Thomas (Technical University of Moldova, 2005)
    In this work the experimental investigation of the resistive transitions broadening for magnesium diboride films and their microstructure is reported. The MgB2 films were prepared by dc-magnetron sputtering. To explore the ...
  • AFM Tapping Mode Phase-Imaging of Carbon Nanotubes 
    KOCH, Thomas (Technical University of Moldova, 2005)
    In the meantime AFM-imaging of carbon nanotubes has become a usual tool to get detailed information about the samples. This work introduces some new aspects in Tapping Mode Phase Imaging that may support the proper ...
  • Solid-state nanophysics for spin-based quantum computing 
    KANTSER, V. (Technical University of Moldova, 2005)
    Fascinating growth in the number of transistors on a chip in the microelectronics industry requires spectacular reduction of the transistor size. Due to governance of the laws of quantum solid-state nanophysics at nanometer ...
  • Quasi-vertical Schottky-structures for THZ-applications 
    COJOCARI, O.; SYDLO, C.; HARTNAGEL, H.-L.; TIGINYANU, I. M. (Technical University of Moldova, 2005)
    This paper presents the results of a systematical work on the improvement of high-frequency performance of quasi-vertical structures for THz-applications. Three versions of structure-design based on a quasi-vertical concept ...
  • Determination of the optical nonlinear coefficients signs for ZnO films and single crystal 
    BUINITSKAYA, G. (Technical University of Moldova, 2005)
    The epitaxial thin films and single crystals of ZnO were investigated by optical second harmonic generation (SHG). A method for characterization the optical nonlinear coefficients of ZnO are proposed. It is shown that the ...
  • About the green band nature in the PL spectra of ZnS:Al crystals annealed in Bi and Pb based melts 
    SUSHKEVICH, Konstantin; SOBOLEVSKAYA, Raisa; KOROTKOV, Vitalii; BRUK, Leonid; KETRUSH, Peter (Technical University of Moldova, 2005)
    The photoluminescence at 77K of ZnS and ZnS:Al single crystals annealed in the Pb, Pb+0,2wt% PbCl2, and Bi+1,5•10-3wt% Al melts was investigated. It is shown that during the annealing process in the near the surface region ...
  • Propagation of laser radiation in nonlinear coupler in the case of two-photon excitation of biexcitons 
    KHADZHI, Piotr; KOROVAI, Olesya; NOSENKO, Olga; KORDONSKAYA, Nadejda (Technical University of Moldova, 2005)
    The propagation peculiarities of coherent laser radiation in two identical semiconductor waveguides are investigated. The system of the nonlinear differential equations is derived, which describes the intensity of propagating ...
  • Oscillation of the superconducting critical temperature in superconductor/ferromagnet bilayers 
    ZDRAVKOV, V.; SIDORENKO, A.; RYAZANOV, V.; OBOZNOV, V.; HORN, S.; WIXFORTH, A.; TIDECKS, R. (Technical University of Moldova, 2005)
    Present work reports the results of proximity effect investigation for superconducting Nb-Cu/Ni bilayers with the thickness of the ferromagnetic layer (CuxNi1-x) being in sub-nanometer scale. It was found a non-monotonic ...
  • Excitonic luminescence of the tungsten disulfide crystals intercalated with halogen molecules 
    DUMCHENKO, Dmitry (Technical University of Moldova, 2005)
    The radiative recombination in the layered disulfide transition metal dichalcogenide compounds 2H-WS2:I2 and 2H-WS2:Br2 has been investigated. It is shown that the strong photoluminescence (PL) of these indirect band gap ...
  • Some properties of lead telluride wire crystals in glass isolation 
    DYNTU, M.; KANTSER, V.; MEGLEI, D. (Technical University of Moldova, 2005)
    Wire crystals (WC) based on lead telluride due to large free path lengths and large de Broglie wavelengths are convenient objects for observation and investigation of classical and quantum size effects. The paper describes ...
  • Characterization of silicon p-i-n photodiode electrophysical parameters 
    PEREVERTAYLO, Vladymyr; POPOV, Vladymyr; POKANEVICH, Aleksej; KARENGIN, Vitaliy (Technical University of Moldova, 2005)
    Electrophysical parameters of test structures formed in high - resistivity silicon during manufacturing of p-i-n photodiodes have been investigated. Using specially designed metal-insulator-semiconductor (MIS) structures ...
  • Many-cloud phonon propogators in the case of acoustical phonons 
    DIGOR, D. F. (Technical University of Moldova, 2005)
    In the High Temperature Superconductors we consider the system of correlated electrons which interect with phonons. In the theory of such sistems an effective way to describe correlation effects of electrons is based on ...
  • The capture and recombination levels energetic diagram in GaSe (Cu) stratified single crystals 
    CARAMAN, Mihail; EVTODIEV, Igor; CUCULESCU, Elmira (Technical University of Moldova, 2005)
    By studying PL spectra, as well photonductivity kinetics and spectral dependences, for different excitation (photon) energies in temperature range 78 K up to ~420 K, energies of localized states due to both Cu and ...
  • Investigation of the CdTe epitaxial layers EDGE radiation spectrum structure 
    GASHIN, P.; GAUGASH, P.; KETRUSH, P.; FEDOROV, V.; SPRINCHEAN, V.; DMITROGLO, L. (Technical University of Moldova, 2005)
    Recently the interest toward alternative energy sources had sharply increase. Solar energy conversion into electrical one is among the most perspective kinds of non- traditional kinds of energy supply. Cadmium telluride ...
  • Metal– semiconductor and HTSC – semiconductor contacts for diode detectors 
    KERNER, Iacov (Technical University of Moldova, 2005)
    The numerical modeling of the electrical potential distribution and current passing in the contacts of the high temperature superconductor with semiconductor InSb had been made. There were analyzed the possibilities to ...
  • Influence of source temperature upon the contamination with cu of thin-film CDTE solar cells grown by close space sublimation technique 
    GHIMPU, L.; URSAKI, V. V.; POTLOG, T.; TIGINYANU, I. M. (Technical University of Moldova, 2005)
    Photoconversion efficiencies up to 16.5 % have been attained from CdTe/CdS solar cells. CdTe/CdS heterojunction can be deposited cheaply over large areas using the close space sublimation (CSS) technique. In a previous ...
  • Thin-film cadmium telluride solar cells 
    GHIMPU, L.; ANTONIUC, C.; POTLOG, T.; TIGINYANU, I.; URSAKI, V. (Technical University of Moldova, 2005)
    This work investigates the photovoltaic properties of CdS/CdTe thin-film solar cells. CdS and CdTe were deposited by the close-space-sublimation method on glass plates with an area of 2x2 cm2 covered with a SnO2 layer. ...

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