Antonio de Alfián y Juan de Oviedo el Viejo. El retablo de la Inmaculada de la Parroquia de Santa Ana de Sevilla (1573-1574)

En este artículo se documenta el retablo concertado conjuntamente por el pintor Antonio de Alfián y el entallador Juan de Oviedo el Viejo para el altar de Melchor de Horozco en la parroquia sevillana de Santa Ana. Del retablo sólo se han conservado en la actualidad las pinturas que formaron parte del conjunto, pinturas que, a pesar de haber sido atribuidas a diversos pintores, nunca se habían vinculado con el estilo de Alfián. A partir del estudio de éstas, es posible atribuirle otras obras, algunas de las cuales analizamos.This paper examines the painted and carved altarpiece made by the painter Antonio de Alfián and the “entallador” Juan de Oviedo the Elder for Melchor de Horozco in the parish church of Santa Ana in Seville. Only the paintings, however, are preserved. Never before linked to this master, these paintings allow a more complete understanding of Alfián’s somewhat unknown style. Thanks to the documentation of the altarpiece, it is now possible to attribute other works to this painter, some of which we study

Research into influence of the electrolysis modes on the composition of galvanic Fe-Co-Mo coatings

Досліджено вплив енергетичних (густина струму і) і часових (тривалість імпульсу tі і паузи tn, співвідношення tі/tn) параметрів електролізу на склад та морфологію покриттів Fe-Co-Mo. Встановлено, що підвищення тривалості імпульсу сприяє збагаченню сплаву молібденом тим більше, чим вище густина струму. Показано, що зі збільшенням густини струму структура поверхні покриттів змінюється від дрібнозернистої до глобулярної

Enhancement of the electric dipole moment of the electron in BaF molecule

We report results of ab initio calculation of the spin-rotational Hamiltonian parameters including P- and P,T-odd terms for the BaF molecule. The ground state wave function of BaF molecule is found with the help of the Relativistic Effective Core Potential method followed by the restoration of molecular four-component spinors in the core region of barium in the framework of a non-variational procedure. Core polarization effects are included with the help of the atomic Many Body Perturbation Theory for Barium atom. For the hyperfine constants the accuracy of this method is about 5-10%.Comment: 8 pages, REVTEX, report at II International Symposium on Symmetries in Subatomic Physics, Seattle 199

Spin noise of a halide perovskite

We report on first observation of spin noise in a strongly birefringent semiconductor -- halide perovskite single crystal MAPbI$_3$. The observed spin noise resonance is ascribed to free holes with a record spin dephasing time of 4 ns. The spin dynamics is found to be affected by the residual light absorption of the crystal providing renormalization of the Larmor frequency. Extended spin noise spectroscopy with rotating magnetic field allowed us not only to evaluate the $g$-factor anisotropy, but also to distinguish two different spin subsystems tentatively associated to twinning of the crystal.Comment: 14 pages, 11 figure

Influence of AC electric field on the charge generation in albumin solution in a flow-based AFM-fishing system

The work was supported by the Russian Ministry of Education and Science, Agreement No. 14.613.21.0063, universal identifier RFMEFI61317X0063

Spin-Orbit Interactions in Bilayer Exciton-Condensate Ferromagnets

Bilayer electron-hole systems with unequal electron and hole densities are expected to have exciton condensate ground states with spontaneous spin-polarization in both conduction and valence bands. In the absence of spin-orbit and electron-hole exchange interactions there is no coupling between the spin-orientations in the two quantum wells. In this article we show that Rashba spin-orbit interactions lead to unconventional magnetic anisotropies, whose strength we estimate, and to ordered states with unusual quasiparticle spectra.Comment: 36 pages, 12 figure