Abstract
Abstract Much attention is currently being directed toward the experimental and theoretical study of conducting quasi-one-dimensional systems, of which (TTF) (TCNQ) and KPC (K2Pt(CN)4, Br0.3.3.2H2O)1 are the principal prototypes. All of the known materials derived from these prototypes either undergo a metal-insulator transition at some finite temperature, or become several times more resistive at low temperatures than at room temperature; furthermore, all known organic polymer systems are insulators at all temperatures. By contrast, the highly anisotropic conducting polymer polysulfur nitride, (SN)x, not only becomes continuously less resistive with decreasing temperature, but in fact is a superconductor below 0.3°K.2 It is important to understand why quasi-one-dimensional instabilities are suppressed in (SN)x thus allowing superconductivity to occur. Such know-ledge may serve as a guide in synthesizing new organic metals stable to much lower temperatures.
Published Version
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