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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2012, Volume 95, Issue 6, Pages 317–322
(Mi jetpl2461)
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This article is cited in 12 scientific papers (total in 12 papers)
CONDENSED MATTER
Anisotropic distributions of electrical currents
in high-${T_{c}}$ grain-boundary junctions
M. Yu. Kupriyanova, M. M. Khapaeva, Y. Y. Divinb, V. N. Gubankovc a Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University
b Peter Gruenberg Institute, Forschungszentrum Juelich
c Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences
Abstract:
We developed a self-consistent method for calculations of spatial current distributions in
high-$T_{c}$ grain-boundary junctions. It is found that crystallographic anisotropy of high-
$T_{c}$ superconducting electrodes results in the effects, which previously were not
taken into account for interpretations of experimental data. Among them is a significant
redistribution of electrical currents in superconducting electrodes in the vicinity of a grain
boundary. In particular in the case of [100]-tilt bicrystal junctions, this current redistribution
results in a substantial focusing to the top or bottom part of a thickness of the grain
boundary, depending on “roof”- or “valley”-type of the grain boundary. This redistribution is
accompanied by generation of vortex currents around the grain boundary, which leads to
selfbiasing of grain-boundary junctions by magnetic field nucleated by these vortex
currents. It is shown that twinning or variation of geometrical shape of the high-$T_{c}$
electrode may also result in intensive redistribution of electrical currents and nucleation of
local magnetic fields inside a high-$T_{c}$ superconducting electrodes.
Received: 14.02.2012
Citation:
M. Yu. Kupriyanov, M. M. Khapaev, Y. Y. Divin, V. N. Gubankov, “Anisotropic distributions of electrical currents
in high-${T_{c}}$ grain-boundary junctions”, Pis'ma v Zh. Èksper. Teoret. Fiz., 95:6 (2012), 317–322; JETP Letters, 95:6 (2012), 289–294
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https://www.mathnet.ru/eng/jetpl2461 https://www.mathnet.ru/eng/jetpl/v95/i6/p317
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Abstract page: | 201 | Full-text PDF : | 59 | References: | 47 | First page: | 12 |
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