Abstract
The temperature dependence of electric conductivity and current-voltage characteristics were studied in CuO single crystals with Cu films deposited onto natural faces by thermal evaporation in vacuum or by electrolysis. After electric (resistive) or thermal annealing of the samples, the conductivity of Cu films in this system significantly increases (by a factor of up to 1.5×105 and above) as compared to that of the control Cu films on a glass-ceramic substrate. The effect is attributed to an interfacial layer formed between CuO and Cu, the high conductivity mechanism in which is unclear. It is suggested that the giant electric conductivity and its HTSC-like temperature dependence, as well as nonlinear current–voltage characteristics of the samples can be due to the formation of superconducting regions with the critical temperatures significantly higher than 400 K.
Similar content being viewed by others
References
C. B. Azzoni, G. B. Paravicini, G. Samoggia, et al., Z. Naturforsch. A 45, 790 (1990).
R. Schönberger, H. H. Otto, B. Brunner, et al., Physica C (Amsterdam) 173, 159 (1991).
A. A. Samokhvalov, T. I. Arbuzova, V. V. Osipov, et al., Fiz. Tverd. Tela (St. Petersburg) 38, 3277 (1996) [Phys. Solid State 38, 1788 (1996)].
A. V. Mitin, G. N. Kuzmicheva, V. V. Murashov, et al., Zh. Éksp. Teor. Fiz. 107, 1943 (1995) [JETP 80, 1075 (1995)].
A. V. Mitin, in Proceedings of the XIII Ural International Winter School on the Physics of Semiconductors, Yekaterinburg, 1999, p. 120.
V. I. Tsebro, O. E. Omel’yanovskii, and A. P. Moravskii, Pis’ma Zh. Éksp. Teor. Fiz. 70, 457 (1999) [JETP Lett. 70, 462 (1999)].
Y. Kopelevich, P. Esquinazi, J. H. S. Torres, and S. Moehlecke, J. Low Temp. Phys. 119, 691 (2000).
V. V. Osipov and A. A. Samokhvalov, Fiz. Met. Metalloved. 89(5), 43 (2000) [Phys. Met. Metallogr. 89, 463 (2000)].
A. A. Samokhvalov, N. A. Viglin, B. A. Gizhevskii, et al., Zh. Éksp. Teor. Fiz. 103, 951 (1993) [JETP 76, 463 (1993)].
A. V. Mitin, N. E. Alekseevskii, and E. P. Khlybov, Sverkhprovodimost: Fiz., Khim., Tekh. 5, 290 (1992).
B. Batlogg and Chandra M. Varma, http://Physics-Web.org/article/world/13/2/8 (2000).
Author information
Authors and Affiliations
Additional information
__________
Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 120, No. 5, 2001, pp. 1246–1255.
Original Russian Text Copyright © 2001 by Osipov, Kochev, Naumov.
Rights and permissions
About this article
Cite this article
Osipov, V.V., Kochev, I.V. & Naumov, S.V. Giant electric conductivity at the CuO-Cu interface: HTSC-like temperature variations. J. Exp. Theor. Phys. 93, 1082–1090 (2001). https://doi.org/10.1134/1.1427119
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1427119