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  • Quantum oscillations in topological insulator microwires contacted with superconducting In2Bi leads 
    KONOPKO, Leonid; NIKOLAEVA, Albina; HUBER, Tito (Technical University of Moldova, 2024)
    Here we studied the magnetoresistance (MR) of polycrystal Bi2Te2Se topological insulator (TI) microwires contacted with superconducting In2Bi leads. Bi2Te2Se has a simple band structure with a single Dirac cone on the ...
  • Quantum Oscillations of Conductivity in Bismuth Wires 
    CONDREA, Elena (Technical University of Moldova, 2011)
    Measurements of the resistance of bismuth nanowires with several diameters and different quality reveal oscillations on the dependence of resistance under uniaxial strain at T = 4.2 K. Amplitude of oscillations is significant ...
  • Quantum photon conversion via coherently driven permanent dipole systems 
    CARLIG, S.; MIRZAC, A.; BARDETSKI, P.; MACOVEI, M. A. (Universitatea Tehnică a Moldovei, 2021)
    The photon quantum dynamics in a damped single-mode quantized cavity field coupled with a resonantly driven two-level system possessing nonzero permanent dipoles is investigated here. The interacting subsystems are very ...
  • Quantum size effect in semimetal bismuth antimony wires and films 
    NIKOLAEVA, Albina; KONOPKO, Leonid; GRABOV, Vladimir; DEMIDOV, Evghenii; KABLUKOVA, Natalia; KOMAROV, Vladimir; POPOV, Ivan (Tehnica UTM, 2014)
    — We present the experimental results of an investigation of the electron transport of semimetal single- crystal Bi1-xSbx films and wires in temperature range 4.2-300 K. Bi-3at.%Sb films were prepared by the vacuum discrete ...
  • Quantum transport and magnetic phenomena in nano-width crystallite interfaces of topological insulators Bi1-x - Sbx (0,07≤x ≤ 0.2) 
    MUNTYANU, F. M.; CHISTOL, V.; BEJAN, V.; MUNTEANU, V. (Institutul de Fizică Aplicată, 2012)
    In this report, we present the investigation of the magnetic and transport phenomena at low temperatures and in high magnetic fields, having as objective the elucidation of the role played by nano-width CI in the interaction ...
  • Quantum Transport, Superconductivity, and Weak Ferromagnetism at Bicrystal Interfaces of Bi and 3D Topological Insulator BiSb 
    MUNTYANU, Fiodor M.; GILEWSKI, Andrzej; CHISTOL, Vitalie; MUNTEANU, Viorel; ROGACKI, Krzysztof; SIDORENKO, Anatolie (Springer Nature Switzerland, 2018)
    This chapter reviews the results of study of electronic quantum transport, superconductivity, and magnetic phenomena of bicrystals of Bi and BiSb alloy system at temperatures 1.8–100 K and magnetic fields up to 400 kOe. A ...
  • Quantum treatment of self-organization phenomena of excitons and biexcitons 
    CIOBANU, Nellu; ROTARU, Anatol; GONTIA, Ilarie; TRONCIU, Vasile (Technical University of Moldova, 2019)
    We present in this paper the quantum treatment of self-organization phenomena of excitons and biexcitons in the geometry of a ring cavity. Applying the adiabatic elimination method of the exciton and biexciton variables, ...
  • Quantum wells parameters of In0,3Ga0,7As/GaAs VCSEL lasers 
    DOROGAN, A.; DOROGAN, V.; MEREUTA, A.; SYRBU, A.; SYRBU, N.; VIERU, T.; URSAKI, V.; ZALAMAI, V. (Institutul de Fizică Aplicată al AŞM, 2012)
    Injection lasers based on quantum well (QW) and quantum dots (QD) heterostructures with a low value of threshold current density Jth with continuous emission regime and output power value of 3W have been manufactured. VCSEL ...
  • Quartic differential systems with a non-degenerate monodromic critical point and multiple line at infinity 
    ŞUBĂ, Alexandru; VACARAŞ, Olga (Universitatea de Stat din Tiraspol, 2023)
    The quartic differential systems with a non-degenerate monodromic critical point and non-degenerate infinity are considered. We showthat in this family the maximal multiplicity of the line at infinity is seven. Modulo the ...
  • Quasi optical Schottky diode detectors for fast ultra-wideband detection 
    SOBORNYTSKYY, N.; LISAUSKAS, A.; WEICKHMANN, C.; JAKOBI, R.; SEMENOV, A.; HÜBERS, H.; MÜLLER, R.; HOEHL, A.; COJOCARI, O. (IEEE, 2013)
    We present ultra-wideband zero-bias Schottky diode detector modules with monolithically integrated log-spiral antenna. Detectors exhibit a broad-band response with a stronger roll-off above 800 GHz and the minimum ...
  • Quasi optical Schottky diode detectors for fast ultra-wideband detection 
    COJOCARI, O.; SOBORNYTSKYY, N.; WEICKHMANN, C.; JAKOBY, R.; SEMENOV, A.; HÜBERS, H.; MÜLLER, R.; HOEHL, A. (IEEE, 2016)
    We present ultra-wideband zero-bias Schottky diode detector modules with monolithically integrated log-spiral antenna. Detectors exhibit a broad-band response with a stronger roll-off above 800 GHz and the minimum ...
  • Quasi-Newton Methods for Solving Nonlinear Programming Problems 
    MORARU, V. (Institute of Mathematics and Computer Science, 1995)
    In the present paper the problem of constrained equality optimization is reduced to sequential solving a series of problems of quadratic programming. The Hessian of the Lagrangian is approximated by a sequence of symmetric ...
  • Quasi-one-dimensional FFLO state in the Nb/Ni layered system 
    SIDORENKO, A. S.; ZDRAVKOV, V. I.; PREPELITSA, A. A.; HELBIG, C.; LUO, Y.; GSELL, S.; SCHRECK, M.; KLIMM, S.; HORN, S.; TAGIROV, L. R.; TIDECKS, R. (Elservier, 2003)
    We investigated Nb/Ni bilayers prepared by DC magnetron sputtering on glass substrates. The quality of the films was characterized by small-angle X-ray diffraction analysis. The thickness of the layers was determined by ...
  • Quasi-one-dimensional Fulde-Ferrell-Larkin-Ovchinnikov-like state in Nb/Cu0.41Ni0.59 bilayers 
    SIDORENKO, A. S.; ZDRAVKOV, V. I.; KEHRLE, J.; MORARI, R.; OBERMEIER, G.; GSELL, S.; SCHRECK, M.; MÜLLER, C.; KUPRIYANOV, M. Yu.; RYAZANOV, V. V.; HORN, S.; TAGIROV, L. R.; TIDECKS, R. (Springer Nature Switzerland, 2009)
    In a ferromagnet (F) being in contact with a superconductor (S) an unconventional finite-momentum pairing of electrons forming Cooper pairs occurs. As a consequence, interference effects of the pairing wave function, leading ...
  • Quasi-one-dimensional organic crystals with improved thermoelectric properties 
    CASIAN, A.; BALMUS, I.; DASHEVSKY, Z.; SCHERRER, H.; DUSCIAC, V.; DUSCIAC, R. (Technical University of Moldova, 2005)
    Thermoelectric properties of quasi-one-dimensional (Q1D) organic crystals with the interference of two main electron-phonon interactions are considered. The electrical conductivity, thermopower, electronic thermal conductivity ...
  • Quasi-Optic Transmitter and Receiver Modules Enabling Next-Generation Ultra-Broadband Wireless Links at Carrier-Wave Frequencies Ranging from 60 to 180 GHz 
    MUHSIN, Ali; GUZMÁN, Robinson Cruzoe; COJOCARI, Oleg; NELLEN, Simon; SANTAMARÍA, Gabriel; GARCÍA-MUÑOZ, Luis Enrique; SEGOVIA-VARGAS, Daniel; GLOBISCH, Björn; CARPINTERO, Guillermo (Springer Nature Switzerland, 2019)
    A wireless link using quasi-optic transmitter and receiver modules is demonstrated, enabling carrier wave frequency selection within various millimeter-wave bands from E-band to D-band without changing the modules. The ...
  • Quasi-Optical Schottky Barrier Diode Detector for mmWave/sub-THz Wireless Communication 
    MUHSIN, Ali; GUZMAN, Robinson Cruzoe; RIVERA-LAVADO, Alejandro; COJOCARI, Oleg; GARCIA-MUFIOZ, Luis Enrique; CARPINTERO, Guillermo (IEEE, 2018)
    We report on the development of a compact quasioptical zero-bias Schottky barrier diode (QO-SBD) envelope detector for mmWave/sub-THz frequencies. The detector consists of a Schottky diode mounted on a self-complementary ...
  • Quasi-Ordered Networks of Metal Nanotubes Embedded in Semiconductor Matrices for Photonic Applications 
    TIGINYANU, I. M.; URSAKI, V. V.; MONAICO, E.; ENACHI, M.; SERGENTU, V. V.; COLIBABA, G.; NEDEOGLO, D. D.; COJOCARU, A.; FÖLL, H. (American Scientific Publishers, 2011)
    We report on templated fabrication of metal nanotubes by electrochemical pulsed deposition of Pt in InP and ZnSe porous layers with pore diameters from 40 to 400 nm. Ordered two-dimensional hexagonal arrays of pores are ...
  • 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 ...
  • Quasisurface nonlinear nonsymmetric waves in symmetric three–layer structure with left-handed film 
    KOROVAI, O. V.; COROVAI, A. V.; KHADZHI, P. I. (Tehnica UTM, 2018)
    We study the theory of nonsymmetric nonlinear s–polarized quasisurface waves, propagating along the plane interface of symmetric three–layer structure with linear lefthanded film. The behavior of dispersion laws depends ...

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