IRTUM – Institutional Repository of the Technical University of Moldova

Browsing Colecția instituțională by Author "KONOPKO, L. A."

Browsing Colecția instituțională by Author "KONOPKO, L. A."

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  • Bi-Sb layers and wires for magneto- thermoelectric applications 
    NIKOLAEVA, A. A.; KONOPKO, L. A.; BODIUL, P. P.; POPOV, I. A.; MOLOSNIK, E. F.; RASTEGAEV, G. M. (Institutul de Fizică Aplicată, AŞM, 2018)
    This study is aimed at increasing the thermoelectric figure of merit ZT to maximize the power factor and minimize the thermal conductivity. In this paper, we present the results of measurements of transport effects in ...
  • Change the topology Fermi surface in doped by the bismuth wires at the elastic deformation 
    KOBYLIANSKAYA, A. K.; NIKOLAEVA, A. A.; KONOPKO, L. A.; PARA, Gh. I.; BOTNARY, O. V. (Institutul de Fizică Aplicată, 2016)
    We present a study of the Shubnikov de Haas (SdH) oscillations, transport and thermoelectrical properties of the bismuth wires doped with Te in glass cover in condition strong elastic deformations at 4.2- 300 K. The effect ...
  • Features of display the quantum dimensional effects in cylindrical semimetal bismuth antimony nanowires 
    NIKOLAEVA, A. A.; KONOPKO, L. A.; GHERGHISHAN, I.; POPOV, I. A.; PARA, Gh. I.; KOBYLIANSKAYA, A. K. (Academia de Ştiinţe a Moldovei, 2019)
    We have developed the method of preparation of the single- crystalline semimetallic bismuth antimony nano- and microwires in glass cover with diameter from 50 nm to 1000 nm, and orientation along the wire axis [1011], using ...
  • Peculiarities of diffusion thermopower with impurity electron topological transition in heavily doped bismuth wires 
    NIKOLAEVA, A. A.; KONOPKO, L. A.; BODIUL, P. P.; TSURKAN, A. K. (Институт термоэлектричества Национальной академии наук и Министерства образования и науки Украины, 2014)
    This paper presents a series of investigations of differential thermopower and resistance in the temperature range of 4.2 – 300 K of samples shaped as glass-coated single-crystal Bi wires heavily doped with Sn acceptor ...
  • Peculiarities of phonon drag effect in bismuth wires 
    KONOPKO, L. A.; NIKOLAEVA, A. A.; PARA, Gh. I.; BOTNARI, O. V. (Institutul de Fizică Aplicată, 2012)
    Low dimensional materials, such as nanowires, have attracted substantial attention in theoretical and experimental studies. In work predicts an enhancement of the thermoelectric power for nanowires.
  • Resistive Transition Broadening of Metal-Oxide Superconductors in Magnetic Fields 
    SIDORENKO, A. S.; KONOPKO, L. A.; KOSHELEV, A. E.; SIMONOV, A. Yu. (WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim, 1989)
    This note reports results of measurements and calculations of a shape of superconductive transitions of Bi-Sr-Ca-Cu-O polycrystalline samples. Bi4Sr3Ca3Cu4Ox samples with 2x3x10 mm3 dimensions were prepared by solid-state ...
  • Sign-reversal thermopower in BI2SR2CACU2OY 
    BOIKO, M. P.; KANTSER, V. G.; KONOPKO, L. A.; SIDORENKO, A. S. (Elservier, 1989)
    Sign-reversal thermopower was observed in the single-phase superconductor Bi2Sr2CaCu2Oy. We consider the model density of states, which describes the thermopower behaviour.
  • Size-Quantization Semimetal–Semiconductor Transitionin Bi0.98Sb0.02 Nanowires: Thermoelectric Properties 
    NIKOLAEVA, A. A.; KONOPKO, L. A.; HUBER, T. E.; BODIUL, P. P.; POPOV, I. A.; MOLOSHNIK, E. F. (Springer Nature Switzerland, 2012)
    We fabricated Bi0.98Sb0.02 wires with diameters in the range between 200 nm and 2 μm and studied their electronic transport and thermoelectric properties. Rotational diagrams and strong Shubnikov–de Haas oscillations show ...
  • Thermoelectric Properties and Surface States in the Layers of Bi2Te3 Topological Insulators 
    NIKOLAEVA, A. A.; KONOPKO, L. A.; ROGATSKII, K.; BODYUL, P. P.; GHERGISHAN, I. (Institute of Applied Physics, Academy of Sciences of Moldova, Chisinau, Republic of Moldova, 2018)
    The thermoelectric properties and Shubnikov-de Haas (SdH) oscillations of monocrystalline layers of a topological insulator (ТI) of n-type bismuth telluride were investigated. The monocrystalline Bi2Te3 layers were fabricated ...
  • Thermoelectric properties semimetal and semiconductor Bi1-xSbx foils 
    NIKOLAEVA, A.; KONOPKO, L. A.; SHEPELEVICH, V. G.; PROKOSHIN, V. I.; GUSAKOVA, S. V.; BODIUL, P. P.; GRITSKO, R.; POLTAVETS, A. (Academia de Ştiinţe a Moldovei, 2016)
    We have studied thermoelectric magneto- thermoelectric properties of Bi1-xSbx foils in semimetal and semiconductor states. The Bi1-xSbx foils were prepared by crystallization a thin layer of the melt on the inside polished ...
  • Topological insulator Bi2Te3 layers, transport and thermoelectric properties 
    NIKOLAEVA, A. A.; KONOPKO, L. A.; ROGACKI, K.; RUSU, A.; GRITSKO, R. (Institutul de Fizică Aplicată, 2016)
    We have investigated thermoelectric properties and Shubnikov de Haas (SdH) oscillations in topological insulator (TI) Bi2Te3 layers. TI are electronic materials that have a bulk band gap like an ordinary insulator but have ...

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