CURRENT-INDUCED RESISTIVE STATES IN SUPERCONDUCTING FILMS

We present an experimental study of the current induced destruction of superconductivity in thick cylindrical indium films. The most interes ting aspect of these experiments is the possibility to observe and inv estigate different mechanisms of the superconductivity destruction dep ending on the ratio of the sample thickness d to the coherence length xi(T). If d/xi(T)<4.5 we observed a resistive state throughout the sec tion of the film, but in the case of d/xi(T)>4.5 the destruction of su perconductivity started with the formation of a normal shell along the outer surface of the sample together with a thin layer of the two-dim ensional mixed state at the inner surface.