Anomalies in the superconducting properties of the misfit layer compound (BiS)1.08TaS2

Superconductivity weak link junctions of (BiS)1.08TaS2 single crystals are investigated using a novel weak link production technique. Previous and present measurements of the superconducting properties of (BiS)1.08TaS2 indicate the presence of two different critical temperatures at which transitions take place. Experimental observations are presented supporting the assertion that a transition from bulk (T<0.75 K) to 1D superconductivity (0.75 K<T<1.05 K) takes place. Differential resistance measurements of the (BiS)1.08TaS2 weak link junctions indicate the presence of superconducting fluctuations up to temperatures as high as 2.4 K, three times the bulk transition temperature. Furthermore, in these measurements a rich peak structure is observed at low temperatures. (orig.)