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$m), up to ten voltage jumps are observed. The result of the experiment is explained by the formation of vortex lines under the current effect.
Citation:
S. G. Zybtsev, I. G. Gorlova, V. Ya. Pokrovskii, “Dynamic mixed state in micron-size bridges based on Bi$_2$Sr$_2$CaCu$_2$O$_x$ whiskers”, Pis'ma v Zh. Èksper. Teoret. Fiz., 74:3 (2001), 186–190; JETP Letters, 74:3 (2001), 168–172