Элементы сверхпроводящей спинтроники
We theoretically investigate coherent oscillations of the thermopower S as a function of the magnetic flux Ф in six-terminal Andreev interferometers. We demonstrate that the thermopower behavior is determined by a number of contributions originating from the Josephson- and Aharonov–Bohm-like effects as well as from electron–hole asymmetry. The relative weight of these contributions depends on the relation between temperature, voltage bias, and an effective Thouless energy of our setup. We particularly emphasize the role of the system topology that may have a dramatic impact on the behavior of S(Ф).
The study investigated the role of perceptual characteristics and the familiarity factor in the detection of a stimulus in visual search of interface elements. The “share” icons such as “Three dots” and “Outgoing tray” were used as the most used and most controversial among design practitioners. In the course of the quasi-experiment, users of various platforms (Android and iOS) had to search for a target stimulus (one or two) among distractors. The reaction time and the accuracy of finding the target stimuli were recorded. The influence of familiarity of the stimulus on the efficiency of solving the problem of visual search was found, consistent with the effects from previous studies. The results obtained are discussed in the context of the feature integration theory and the Gestalt theory of perception. The prospects for furtherresearch and the area of practical application of the results are outlined.
Nonlinear Ginzburg-Landau equation for dirty supercondicting 1D wire is derived in the limit of high magnetic field.
Proximity induced quantum coherence of electrons in multi-terminal voltage-driven hybrid normalsuperconducting nanostructures may result in a non-trivial interplay between topology-dependent Josephson and Aharonov-Bohm effects. We elucidate a trade-off between stimulation of the voltagedependent Josephson current due to non-equilibrium effects and quantum dephasing of quasiparticles causing reduction of both Josephson and Aharonov-Bohm currents. We also predict phase-shifted quantum coherent oscillations of the induced electrostatic potential as a function of the externally applied magnetic flux. Our results may be employed for engineering superconducting nanocircuits with controlled quantum properties.