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[en] The energy-band structure of InN is predicted using the pseudofunction method (a first-principles, self-consistent local-density scheme). Some significant differences exist between this electronic structure and extrapolated empirical tight-binding theory for InN

[en] Published in summary form only

[en] Specificity of radiative recombination of indium arsenide implanted with elements of the 4 group was investigated in a broad temperature range (4.2 - 100 deg K). Within this temperature range the radiative recombination occurs through the impurity levels connected with implanation of the 4 group elements into InAs. At 4.2 deg K the emissive channels are donor-acceptor transitions, while at 77 deg K band-to-band and conductivity band - accepting level transitions contribute to the emission. Gradual transition from donor-acceptor to band-to-band recombination is observed in the temperature range 4.2 - 100 deg K

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[en] The paper reports on the role of the typical mapping errors in measurement of the lateral sheet current distribution I_y(x) in a superconducting tape. The sheet current is calculated indirectly, from the mapped data of the self magnetic field of the superconducting layer. The field is generated by transport or induced current in a tape. In model calculations examples of the influence of the different types of errors on false shaping of the lateral sheet current profile are given. The field mapping is made outside and over the tape. The lateral profile B_z(x, z) of the magnetic field component, perpendicular to the superconducting layer, is input to the Biot-Savart inverse procedure. In the experiment we have used superconducting tape as a sample and an InSb Hall probe with active surface 20 x 20 μm² as a magnetic field sensor. We demonstrate the details, together with obstacles and errors encountered in measurement and subsequent evaluation. The demonstrations serve for the reader to be aware of limits in interpretation of the measured data and to overcome the natural barrier in understanding, insight and use of this fruitful method.