ORGANIC SUPERCONDUCTORS.

Abstract

The organic superconductors exhibit an unusual variety of collective states at low temperature, including superconducting (T//c less than 2. 5 K), spin density wave and insulating phases. Below approx. 4 K an external magnetic field induces a novel phase transition from a nonmagnetic (metallic state) to a magnetic (semimetallic) state. Other experiments have been interpreted in terms of triplet superconductivity and the persistence of superconducting fluctuations up to 30 K. In this paper the experimental properties of the organic superconductors are reviewed and the various models proposed to explain these properties are discussed.