This article is cited in 11 papers

CONDENSED MATTER

Dynamic mixed state in micron-size bridges based on Bi$_2$Sr$_2$CaCu$_2$O$_x$ whiskers

S. G. Zybtsev, I. G. Gorlova, V. Ya. Pokrovskii

Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow

Abstract: Measurements of the current-voltage characteristics of micron-size bridges made of Bi$_2$Sr$_2$CaCu$_2$O$_x$ single-crystal whiskers are carried out. It is found that, at temperatures below the superconducting transition temperature, the current-voltage characteristics exhibit quasi-periodic voltage jumps with segments of constant differential resistance whose value is proportional to the jump number. For the narrowest bridges ($0.5$–$1$ $\mu$m), up to ten voltage jumps are observed. The result of the experiment is explained by the formation of vortex lines under the current effect.

PACS: 74.25.Fy, 74.60.Ge, 74.72.Hs

Received: 29.06.2001

 English version: Journal of Experimental and Theoretical Physics Letters, 2001, 74:3, 168–172

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