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Chisinau, Moldova

The results of the application of nanostructured coatings, obtained at electrodischarge treatment by toolelectrodes from Al-Sn alloy for restore and repair of machine parts are presented. © Springer Science+Business Media Singapore 2016.

Barengolts Y.A.,Tiraspol State University
Technical Physics Letters | Year: 2012

The influence of atoms, molecules, or layers adsorbed on the cathode surface on the initiation of high-voltage gas discharge is considered. It is shown that the presence of island films of an adsorbate leads to an increase in the field-induced electron emission current that initiates breakdown of the gas-filled interelectrode gap. The formation of a continuous adsorbed film on the cathode accounts for the subsequent weak dependence of the emission characteristics in high-voltage (in particular, picosecond pulsed) discharge on the gas phase composition. © 2012 Pleiades Publishing, Ltd.

Sinyavskii E.P.,Moldova Academy of Sciences | Karapetyan S.A.,Tiraspol State University
Semiconductors | Year: 2012

For nanowires with a parabolic potential, the effect of an electric field E orthogonal to the system's axis on the mobility of charge carriers μ is investigated. With consideration for the interaction of charge carriers with a rough surface, it is shown that, for a nondegenerate electron (hole) gas, the mobility μ decreases with increasing E. For a degenerate electron (hole) gas, the dependence of μ on E is described by a nonmonotonic oscillating function. A physical interpretation of the predicted effect is proposed. © 2012 Pleiades Publishing, Ltd.

Khadzhi P.I.,Moldova Academy of Sciences | Vasilieva O.V.,Tiraspol State University
Journal of Nanoelectronics and Optoelectronics | Year: 2011

The dynamics of tunneling of Bose condensed atoms through a barrier between two wells taking into account elastic interparticle interations was examined using the Gross-Pitaevskii equation. The analytic solutions of the set of nonlinear differential equations were obtained that describe the dependences of the time evolution of atoms in the wells versus the initial densities of atoms, the initial phase difference, and the resonance detuning. It is shown that the time evolution of the system is substantially defined by the initial conditions. It manifests itself as a periodic or aperiodic variation of the density of atoms or a state of rest for non-zero initial densities of atoms in the wells. The found peculiarities of the dependences of time evolution of the density of atoms versus the initial phase difference suggest that it is possible to perform a phase control of the system. © 2011 American Scientific Publishers All rights reserved.

Stamov I.G.,Tiraspol State University | Syrbu N.N.,Stefan Cel Mare University of Suceava | Dorogan A.V.,Stefan Cel Mare University of Suceava
Physica B: Condensed Matter | Year: 2013

Optical functions n, k, ε1, ε2 and d 2ε2/dE2 have been determined from experimental reflection spectra in the region of 1-10 eV. The revealed electronic transitions are localized in the Brillouin zone. The magnitude of valence band splitting caused by the spin-orbital interaction ΔSO is lower than the splitting caused by the crystal field ΔCR in the center of Brillouin zone and L and X points. The switching effects are investigated in Zn3P2 crystals. The characteristics of experimental samples with electric switching, adjustable resistors, and time relays based on Zn3P2 are presented. © 2012 Elsevier B.V. All rights reserved.

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