Anomalous pressure dependence of the electronic transport and anisotropy in SrIrO3 films.

Iridate oxides display exotic physical properties that arise from the interplay between a large spin-orbit coupling and electron correlations. Here, we present a comprehensive study of the effects of hydrostatic pressure on the electronic transport properties of SrIrO3 (SIO), a system that has recently attracted a lot of attention as potential correlated Dirac semimetal. Our investigations on untwinned thin films of SIO reveal that the electrical resistivity of this material is intrinsically anisotropic and controlled by the orthorhombic distortion of the perovskite unit cell. These effects provide another evidence for the strong coupling between the electronic and lattice degrees of freedom in this class of compounds. Upon increasing pressure, a systematic increase of the transport anisotropies is observed. The anomalous pressure-induced changes of the resistivity cannot be accounted for by the pressure dependence of the density of the electron charge carriers, as inferred from Hall effect measurements. Moreover, pressure-induced rotations of the IrO6 octahedra likely occur within the distorted perovskite unit cell and affect electron mobility of this system.

Excess conductivity and Berezinskii-Kosterlitz-Thouless transition in superconducting FeSe thin films.

Temperature-dependent electronic transport in the vicinity of the superconducting transition is reported for quasi-two-dimensional textured FeSe thin films. The conspicuous rounding of the resistive transitions and large transition widths are indications of excess conductivity due to thermal Cooper-pair fluctuations, which can be well-described by the two-dimensional Aslamazov-Larkin theory. The Halperin-Nelson form of the sheet resistance between the phase-ordering temperature TBKT and the mean-field temperature TMF, and the power-law behaviour of the voltage-current characteristics, with a distinctive jump of the exponent at TBKT, are indicative of a Berezinskii-Kosterlitz-Thouless transition. The complementary results suggest a two-dimensional character of superconductivity in the FeSe films and allow a quantitative estimate of the Ginzburg number Gi.

Superconductor-insulator quantum phase transition in disordered FeSe thin films.

The evolution of two-dimensional electronic transport with increasing disorder in epitaxial FeSe thin films is studied. Disorder is generated by reducing the film thickness. The extreme sensitivity of the films to disorder results in a superconductor-insulator transition. The finite-size scaling analysis in the critical regime based on the Bose-glass model strongly supports the idea of a continuous quantum phase transition. The obtained value for the critical-exponent product of approximately 7/3 suggests that the transition is governed by quantum percolation. Finite-size scaling with the same critical-exponent product is also substantiated when the superconductor-insulator transition is tuned with an applied magnetic field.

[Psycho-pedagogic securing of health of military servicemen].

Was shown that cadets and students of elder classes of military, and civil institutes have personal deformations, causing negative tendencies in their health. Was elaborated psycho-pedagogic conception of supply of valeological preparedness of military servicemen. Were successfully tested program-methodological complexes in valeology, based on this conception. Was posed a question about practicability of creation of psycho-pedagogic direction in supply of health of contingents, aimed to service in the Armed Forces.

Observation of interband pairing interaction in a two-band superconductor: MgB2.

The recently discovered anisotropic superconductor MgB2 is the first of its kind showing the intriguing properties of two-band superconductivity. By tunneling experiments using thin film tunnel junctions, electron-coupled phonon spectra were determined showing that superconductivity in MgB2 is phonon mediated. In a further analysis, which involves first principles calculations, the strongest feature in these spectra could be traced back to the key quantity of two-band superconductivity, the interband pairing interaction. For the phonons, this interaction turns out quite selective. It involves mainly low-energy optical phonon modes, where the boron atoms move perpendicular to the boron planes.

[Formation of healthy life style in a young generation]. / Formirovanie zdorovogo obraza zhizni molodogo pokoleniia.

The paper shows how to promote human health, by using pedagogical aids based on the concept of meeting the requirements a human being made at either stage of maturation.

[Psychological basis for self-regulation of behavior in sailors drafted into military service]. / Tsennostno-smyslovye osnovaniia samoreguliatsii povedeniia moriakov, prokhodiashchikh voennuiu sluzhbu po prizyvu.

Valuable-and-semantic spheres of Navy servicemen called-up for military service were investigated. For the servicemen with "psychical discomfort" the behavior "disadaptation" strategy is characteristic: the unrealistic orientation towards the freedom and material security; the problem of difficult choice between the interest in unofficial contact and the necessity to defer to rank; the "internal vacuum" state connected with little value of cognitive orientations and their relative accessibility, and on the contrary, the "internal conflict" state conditioned by the inaccessibility of vital and social values. The most of investigated persons are not oriented towards the highest levels of behavior self-regulation that are connected with the search for sense and choice freedom. They are characterized by the regulation lowest levels connected with stereotype and comfort in observing the social standards (the group of "relative" psychical comfort) or by the non-adequate ways of behavior self-regulation that aggravate the disadaptation, morbidity and person's deformation (the group of "psychical discomfort").