90 research outputs found

    Investigation the role of religious organizations in system of general education: forms of state- confessional interaction

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    The purpose of the this was aimed at conducting a system analysis of the forms of interaction between religious organizations and modern states implementing the secular model regarding the regulation of religion component in the field of general educatio

    Functional self-limitation of state authority

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    Based on the analytical and synthesis study of a wide range of published documentary sources, the article presents the authors’ approach to the issue of self-restriction of state power. It is concluded that, in the considered context of the Russian Federation, the problem of the constant and continuous improvement of the system of separation of state power often seems to manifest itself satisfactoril

    Effects of Disorder and Interactions in the Quantum Hall Ferromagnet

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    This work treats the effects of disorder and interactions in a quantum Hall ferromagnet, which is realized in a two-dimensional electron gas (2DEG) in a perpendicular magnetic field at Landau level filling factor equal one. We study the problem by projecting the original fermionic Hamiltonian into magnon states, which behave as bosons in the vicinity of the ferromagnetic ground state. The approach permits the reformulation of a strongly interacting model into a non-interacting one. The latter is a non-perturbative scheme that consists in treating the two-particle neutral excitations of the electron system as a bosonic single-particle. Indeed, the employment of bosonization facilitates the inclusion of disorder in the study of the system. It has been shown previously that disorder may drive a quantum phase transition in the Hall ferromagnet. However, such studies have been either carried out in the framework of nonlinear sigma model, as an effective low-energy theory, or included the long-range Coulomb interaction in a quantum description only up to the Hartree-Fock level. Here, we establish the occurrence of a disorder-driven quantum phase transition from a ferromagnetic 2DEG to a spin glass phase by taking into account interactions between electrons up to the random phase approximation level in a fully quantum description.Comment: 18 pages, 7 figure

    Chiral superconductivity from repulsive interactions in doped graphene

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    Author Manuscript 17 Sep 2011Chiral superconductivity, which breaks time-reversal symmetry, can exhibit a wealth of fascinating properties that are highly sought after for nanoscience applications. We identify doped graphene monolayer as a system where chiral superconductivity can be realized. In this material, a unique situation arises at a doping where the Fermi surface is nested and the density of states is singular. In this regime, d-wave superconductivity can emerge from repulsive electron–electron interactions. Using a renormalization group method, we argue that superconductivity dominates over all competing orders for generic weak repulsive interactions. Superconductivity develops simultaneously in two degenerate d-wave pairing channels. We argue that the resulting superconducting state is of chiral type, with the phase of the superconducting order parameter winding by 4π around the Fermi surface. Realization of this state in doped graphene will prove that superconductivity can emerge from electron–electron repulsion, and will open the door to applications of chiral superconductivity

    Возможности лучевых методов в ранней пренатальной диагностике диастематомиелии (клинический случай)

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    The presented clinical case demonstrates capabilities of ultrasonography and MR imaging in diagnostics of combined developmental defect of spine  (disorganization, wedge-shaped vertebra, scoliosis) and spinal cord (diastematomyelia) in fetus of 21th week of development confirmed by pathomorphological study.Представленный клинический случай демонстрирует возможности УЗИ и МРТ в диагностике сочетанного порока развития позвоночника (дезорганизация, клиновидные позвонки, сколиоз) и спинного мозга (диастематомиелия) у плода на 21-й нед развития, подтвержденные при патоморфологическом исследовании

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    “Fullerenes and Nanostructures in Condensed Matter”, X International Scientific Conference

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    The work is concerned with ascertainment of the regularities for thermostimulated formation of the phase composition and structure of CoSb3-scutterudite-based films deposited by the vacuum condensation method
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