SUPERCONDUCTIVITY IN RETICULATE DOPED POLYCARBONATE FILMS, CONTAINING(BEDT-TTF)(2)I-3

Electric properties of conducting reticulate doped polymeric films, co ntaining ET polyiodide crystalline network, have been investigated. In order to improve their conducting properties they were annealed in io dine vapors. It was found, that certain conditions of thermal treatmen t lead to metal-like state, stable down to helium temperatures. The ov erall decrease of resistivity R(300K)/R(4.2K) reaches 45. At some cond itions of the thermal treatment an accelerated decrease of resistivity is observed below 7 K, vanishing with application of magnetic field, thus giving the first evidence of the (incomplete) superconducting tra nsition in polymeric organic composite material.