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Information × Registration Number 0221U102032, 0116U002671 , R & D reports Title Hot electron effects in nano- and microstructures. popup.stage_title Head Poroshyn Volodymyr M., Доктор фізико-математичних наук Registration Date 27-01-2021 Organization Institute of Physics of National Academy of Sciences of Ukraine popup.description2 The investigation results on peculiarities of the charge carrier transport and light radiation processes in heterostructures based on the A3B5 compounds with two different conduction channels and nanocomposite carbon material under the conditions of strong non-equilibrium of carriers caused by strong electric field are presented. The unipolar electric transport in AlGaAs/GaAs heterostructures with different types of quantum wells and doping is studied. The conduction band bottom potential profile, the energy spectrum of electrons in quantum wells, and their wave functions are calculated. The model of electron redistribution between tunnel-coupled conduction channels due to heating of current carriers by the applied longitudinal electric field is proposed; and the calculated dependences of the electron temperatures and concentrations in the coupled channels as well as the current on the electric field are given. The bipolar electric transport in the GaAs/InGaAs heterostructures with double asymmetrically doped coupled QWs has been studied. The mechanism of current instabilities is proposed, which is associated with the real space transfer of carriers with both charge signs from the undoped quantum wells to the doped wells. The abnormally large drift length of non-core carriers is noticed. The ambipolar drift of nonequilibrium photogenerated charge carriers in the heterostructures with QW and delta-doped barriers was experimentally investigated by the light probe method. The charge transport mechanisms in the composite carbon material containing nanosized carbon particles chaotically distributed in the dielectric matrix of alumina is investigated in the temperature range from 300 K to 1.8 K. Also, the properties of low-temperature electric transport in the bundles array of the single-wall carbon nanotubes with radiation defects are experimentally investigated. Product Description popup.authors Bilyovskiy Pavlo A Vainberg Viktor V Vinoslavskii Mihaylo M Gudenko Yuliya M Pylypchuk Oleksandr S Poroshyn Volodymyr M Turchyn Oleksandr V Frolova Olena K Chornomorec Nadiya F popup.nrat_date 2021-01-27 Close