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565 results on '"Morozov, V. N."'

6. Superfluid $^3$He in Planar Aerogel

Author

Dmitriev, V. V., Kutuzov, M. S., Mikheev, A. Y., Morozov, V. N., Soldatov, A. A., and Yudin, A. N.

Subjects
Condensed Matter - Superconductivity, Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

We report results of experiments with liquid $^3$He confined in a high porosity anisotropic nanostructure which we call planar aerogel. This aerogel consists of nanofibers (with diameters $\sim10$ nm) which are randomly oriented in the plane normal to the specific axis. We used two samples of planar aerogel prepared using different techniques. We have found that on cooling from the normal phase of $^3$He the superfluid transition in both samples occurs into an equal spin pairing superfluid phase. NMR properties of this phase qualitatively agree with the properties of the superfluid A phase in the anisotropic Larkin-Imry-Ma state. We have observed differences between results obtained in the presence and absence of solid paramagnetic $^3$He on the aerogel strands. We propose that these differences may be due, at least in part, to a magnetic scattering channel which appears in the presence of solid paramagnetic $^3$He., Comment: 9 pages, 11 figures, version 2 (misprints corrected)

Published
2020
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35. The Seismotectonic Consequences of the Strong Maule Earthquake (February 27, 2010, Mw = 8.8) in Chile: Digital Modeling of the Stress–Strain State of the Western Margin of the South American Plate.

Author

Morozov, V. N. and Manevich, A. I.

Subjects
*EARTHQUAKES, *STRAINS & stresses (Mechanics), *STRESS concentration, *EARTHQUAKE aftershocks, *LITHOSPHERE, *SHEARING force, *VOLCANIC eruptions
Abstract

This article presents the seismotectonic consequences of the strong Maule earthquake in Chile, which occurred on February 27, 2010 at Mw = 8.8. The consequences are considered as a manifestation of a large-scale fragment of the general seismotectonic process on the western edge of the South American plate (Chilean sector). Our study shows that manifestations of postseismic processes of the Maule earthquake cover a much larger area compared to the epicentral zone of the aftershocks. Based on the comparison of the results of numerical modeling of the stress–strain state before and after the earthquake, seismological, geodetic, and satellite data, an alternative model of the development of the seismotectonic process in the Chilean sector of the South American plate was proposed. Stress–strain modeling was performed by the finite-element method. The source of the Maule earthquake, at a depth of 33 km, falls into the region of relatively high values of compression stresses and positive maximum shear stresses. It was shown that other strong earthquakes of the Chilean sector in the interval of depths from 20 to 50 km are caused by high concentration of tectonic stresses in the region of transition from oceanic to continental lithosphere. Within the framework of the proposed model of the seismotectonic process ruptures weaken the contact between the oceanic and continental lithosphere after strong earthquakes. Abrupt sinking of the continental lithosphere into the mantle causes an increase in viscous melt pressure, promotes penetration into mega-cracks, and rises to the surface, causing subsequent volcanic eruptions. The results obtained in comparison with the coseismic consequences of earthquakes do not contradict these results of numerical modeling and give new insights into the structure of the lithosphere in the continent‒ocean transition zone and the development of the seismotectonic process. [ABSTRACT FROM AUTHOR]

Published
2023
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