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This article is cited in 5 scientific papers (total in 5 papers)
XXIII International Symposium ''Nanophysics and Nanoelectronics'', Nizhny Novgorod, March 11--14, 2019
Superconductivity
Excess conductivity of anisotropic inhomogeneous superconductors above the critical temperature
T. I. Mogilyuka, P. D. Grigor'evbcd, K. K. Kesharpuc, I. A. Kolesnikovc, A. A. Sinchenkoef, A. V. Frolovf, A. P. Orlovf a National Research Centre "Kurchatov Institute", Moscow
b L.D. Landau Institute for Theoretical Physics of Russian Academy of Sciences
c National University of Science and Technology «MISIS», Moscow
d P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow
e Lomonosov Moscow State University
f Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow
Abstract:
The theoretical model of conductivity of a layered anisotropic normal metal containing small superconducting ellipsoidal granules with an arbitrary ratio of semiaxes is developed. Calculation data obtained under two simple approximations (self-consistent and Maxwell) are compared. The results may be applied in the analysis of the observed temperature dependence of the conductivity anisotropy in various anisotropic superconductors with the superconducting phase emerging in the form of isolated superconducting granules. The temperature dependence of the electric resistance along and across the conducting layers above and near the superconducting transition temperature is studied experimentally for bridge structures of a varying thickness. It is demonstrated that this resistance and even the effective superconducting transition temperature depend strongly on the bridge thickness (i.e., the number of layers through which the electric current flows). Note that significant differences were observed only for the resistance across the layers.
Keywords:
conductivity, superconductors, anisotropy, inhomogeneity.
Received: 15.04.2019 Revised: 22.04.2019 Accepted: 24.04.2019
Citation:
T. I. Mogilyuk, P. D. Grigor'ev, K. K. Kesharpu, I. A. Kolesnikov, A. A. Sinchenko, A. V. Frolov, A. P. Orlov, “Excess conductivity of anisotropic inhomogeneous superconductors above the critical temperature”, Fizika Tverdogo Tela, 61:9 (2019), 1599–1602; Phys. Solid State, 61:9 (2019), 1549–1552
Linking options:
https://www.mathnet.ru/eng/ftt8694 https://www.mathnet.ru/eng/ftt/v61/i9/p1599
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