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Low-field electron emission of diamond/pyrocarbon composites / A. V. Karabutov [et al.] // Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures. - 2001. - Vol. 19: 13th International Vaccum Microelectronics Conference (14 August 2000 through 17 August 2000, Guangzhou, Is. 3. - P965-970, DOI 10.1116/1.1368669 . - ISSN 1071-1023
Кл.слова (ненормированные):
Carbon nanotubes -- Chemical bonds -- Chemical vapor deposition -- Composite materials -- Diamond films -- Electric conductivity -- Electron emission -- Electron energy levels -- Hysteresis -- Interfaces (materials) -- Raman scattering -- Semiconducting diamonds -- Semiconductor quantum wells -- Transmission electron microscopy -- X ray diffraction analysis -- X ray photoelectron spectroscopy -- Pyrocarbon composites -- Nanostructured materials
Аннотация: The properties of field electron emission for diamond/pyrocarbon nanocomposites produced from diamond particles surrounded by a pyrocarbon matrix were studied. Low-threshold emissions at fields of ?1 V/?m with no activation or hysterisis in the current versus voltage (I/V) behaviour were observed for the materials. Scanning tunneling-field emission microscopy was used to study the mechanisms of low-field electron emission from the composites, and a model based on quantum well effect at the diamond/graphite interface was proposed and discussed.

Scopus
Держатели документа:
General Physics Institute, Vavilova str. 38, Moscow 117942, Russian Federation
Central Research Institute of Materials, Paradnaya str. 8, St. Petersburg 191014, Russian Federation
Institute of Biophysics, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Karabutov, A.V.; Frolov, V.D.; Konov, V.I.; Ralchenko, V.G.; Gordeev, S.K.; Belobrov, P.I.

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Coupled large earthquakes in the Baikal rift system: Response to bifurcations in nonlinear resonance hysteresis / A. V. Klyuchevskii, R. G. Khlebopros // Geoscience Frontiers. - 2013, DOI 10.1016/j.gsf.2013.01.008 . - ISSN 1674-9871
Кл.слова (ненормированные):
Baikal rift system -- Bifurcation -- Coupled large earthquakes -- Hysteresis -- Nonlinear geodynamics -- Nonlinear oscillator with dissipation -- Phase portrait
Аннотация: The current lithospheric geodynamics and tectonophysics in the Baikal rift are discussed in terms of a nonlinear oscillator with dissipation. The nonlinear oscillator model is applicable to the area because stress change shows up as quasi-periodic inharmonic oscillations at rifting attractor structures (RAS). The model is consistent with the space-time patterns of regional seismicity in which coupled large earthquakes, proximal in time but distant in space, may be a response to bifurcations in nonlinear resonance hysteresis in a system of three oscillators corresponding to the rifting attractors. The space-time distribution of coupled MLHВ >В 5.5 events has been stable for the period of instrumental seismicity, with the largest events occurring in pairs, one shortly after another, on two ends of the rift system and with couples of smaller events in the central part of the rift. The event couples appear as peaks of earthquake 'migration' rate with an approximately decadal periodicity. Thus the energy accumulated at RAS is released in coupled large events by the mechanism of nonlinear oscillators with dissipation. The new knowledge, with special focus on space-time rifting attractors and bifurcations in a system of nonlinear resonance hysteresis, may be of theoretical and practical value for earthquake prediction issues. Extrapolation of the results into the nearest future indicates the probability of such a bifurcation in the region, i.e., there is growing risk of a pending MВ ?В 7 coupled event to happen within a few years. В© 2013.

Scopus
Держатели документа:
Institute of the Earth's Crust, Siberian Branch of the Russian Academy of Sciences, 128 ul. Lermontov, Irkutsk 664033, Russia
Siberian Federal University, 79, Svobodny ave., Krasnoyarsk 660041, Russia
Institute of Biophysics, Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Klyuchevskii, A.V.; Khlebopros, R.G.

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Coupled large earthquakes in the Baikal rift system: Response to bifurcations in nonlinear resonance hysteresis / A. V. Klyuchevskii, R. G. Khlebopros // Geoscience Frontiers. - 2013. - Vol. 4, Is. 6. - P709-716, DOI 10.1016/j.gsf.2013.01.008 . - ISSN 1674-9871
Кл.слова (ненормированные):
Baikal rift system -- Bifurcation -- Coupled large earthquakes -- Hysteresis -- Nonlinear geodynamics -- Nonlinear oscillator with dissipation -- Phase portrait
Аннотация: The current lithospheric geodynamics and tectonophysics in the Baikal rift are discussed in terms of a nonlinear oscillator with dissipation. The nonlinear oscillator model is applicable to the area because stress change shows up as quasi-periodic inharmonic oscillations at rifting attractor structures (RAS). The model is consistent with the space-time patterns of regional seismicity in which coupled large earthquakes, proximal in time but distant in space, may be a response to bifurcations in nonlinear resonance hysteresis in a system of three oscillators corresponding to the rifting attractors. The space-time distribution of coupled MLH > 5.5 events has been stable for the period of instrumental seismicity, with the largest events occurring in pairs, one shortly after another, on two ends of the rift system and with couples of smaller events in the central part of the rift. The event couples appear as peaks of earthquake 'migration' rate with an approximately decadal periodicity. Thus the energy accumulated at RAS is released in coupled large events by the mechanism of nonlinear oscillators with dissipation. The new knowledge, with special focus on space-time rifting attractors and bifurcations in a system of nonlinear resonance hysteresis, may be of theoretical and practical value for earthquake prediction issues. Extrapolation of the results into the nearest future indicates the probability of such a bifurcation in the region, i.e.; there is growing risk of a pending M ? 7 coupled event to happen within a few years.В© 2013, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

Scopus
Держатели документа:
Institute of the Earth's Crust, Siberian Branch of the Russian Academy of Sciences, 128 ul. Lermontov, Irkutsk 664033, Russian Federation
Siberian Federal University, 79 Svobodny ave., Krasnoyarsk 660041, Russian Federation
Institute of Biophysics, Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Klyuchevskii, A.V.; Khlebopros, R.G.

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Large Earthquakes in the Baikal Region as Response to Bifurcations in Nonlinear Resonance Hysteresis [Text] / A. V. Klyuchevskii, R. G. Khlebopros // Dokl. Earth Sci. - 2014. - Vol. 457, Is. 1. - P845-849, DOI 10.1134/S1028334X1407006X. - Cited References: 13 . - ISSN 1028-334X. - ISSN 1531-8354

РУБ Geosciences, Multidisciplinary
Рубрики:
ATTRACTOR STRUCTURES
   RIFT SYSTEM
   LITHOSPHERE
   RIFTOGENESIS
   EVOLUTION
   STAGE
Аннотация: The hypothesis that large earthquakes in the Baikal region are a response to bifurcations in nonlinear resonance hysteresis in a system consisting of three oscillators, attractor structures of riftogenesis, is substantiated. The hypothesis is confirmed by the spatial-temporal and magnitude distribution of large earthquakes: all the pairs of earthquakes with magnitude M-LH 5.5 that took place in the region within a small time period but were remote from one another show fair agreement with the main theoretical conclusions.

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Держатели документа:
[Klyuchevskii, A. V.] Russian Acad Sci, Inst Earths Crust, Siberian Branch, Irkutsk 664033, Russia
Russian Acad Sci, Siberian Branch, Krasnoyarsk Res Ctr, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
КНЦ СО РАН
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Klyuchevskii, A.V.; Khlebopros, R.G.

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Low-field electron emission of diamond/pyrocarbon composites [Text] / A. V. Karabutov [et al.] // J. Vac. Sci. Technol. B. - 2001. - Vol. 19: 13th International Vacuum Microlectronics Conference (AUG 13-17, 2000, GUANGZHOU, PEOPLES R CHINA), Is. 3. - P. 965-970, DOI 10.1116/1.1368669. - Cited References: 31 . - ISSN 1071-1023

РУБ Engineering, Electrical & Electronic + Nanoscience & Nanotechnology + Physics, Applied
Рубрики:
CVD DIAMOND FILMS
   SCANNING-TUNNELING-MICROSCOPY
   AMORPHOUS-CARBON
   COLD-CATHODE
Аннотация: Properties of the field electron emission for diamond/pyrocarbon nanocomposites produced from diamond particles surrounded by an sp(2)-bonded pyrocarbon matrix are considered as functions of a size of diamond particles selected in the range of 5 nm - 5 mum, and of an average thickness of the pyrocarbon shell controlled by the pyrocarbon/diamond mass ratio varied from 0 to 0.5. The low-threshold emission at fields of greater than or equal to1 V/mum with ''no activation/no hysteresis'' I-V behavior was observed for these materials using tungsten tip microprobes as well as a fluorescent screen. A specially designed scanning tunneling-field emission microscope was used for simultaneous mapping of field emission intensity, topography, work function, and electrical resistivity to study the mechanisms of the emission from the composites and well-emitting chemical vapor deposition diamond films. It was found that for both of the materials emission centers are associated with interfaces between diamond and sp2-bonded carbon phases. Possible mechanisms of the low-field electron emission for the diamond/graphite composites including local field enhancement are analyzed. A model of the low-field emission based on quantum well effect at the diamond/graphite interface is proposed and discussed. (C) 2001 American Vacuum Society.

WOS
Держатели документа:
Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia
Cent Res Inst Mat, St Petersburg, Russia
Russian Acad Sci, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Karabutov, A.V.; Frolov, V.D.; Konov, V.I.; Ralchenko, V.G.; Gordeev, S.K.; Belobrov, P.I.

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Day plots of bacterial magnetite from sediments of shira lake (Khakassia, Russia) / S. V. Semenov [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 2. - P252-256, DOI 10.17516/1997-1397-2017-10-2-252-256 . - ISSN 1997-1397
Кл.слова (ненормированные):
Bacterial magnetite -- Magnetic hysteresis -- Nanoparticles
Аннотация: The domain state of magnetite detected in sediments of Shira lake (Khakassia, Russia) was examined by means of magnetic hysteresis. Analysis of experimental data obtained on samples from different parts of bottom sediment cores in terms of Day plots allowed us to conclude that magnetite particles are in the pseudo-single-domain state. This indicates respectively small size of magnetite particles (< 100 nm) and reveals their bacterial origin. Biogenic magnetite buried in the bottom sediments can indicate the climatic changes in the Shira lake level in the Late Holocene. © Siberian Federal University. All rights reserved.

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Держатели документа:
Kirensky Institute of Physics SB RAS, Akademgorodok, 50/38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Akademgorodok, 50/50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Semenov, S. V.; Balaev, D. A.; Shaykhutdinov, K. A.; Rogozin, D. Y.

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