Metal-nonmetal transition and the superconductivity in TaSe_3(LOCALIZATION AND SUPERCONDUCTIVITY IN ID CONDUCTORS, International Symposium on NONLINEAR TRANSPORT AND RELATED PHENOMENA IN INORGANIC QUASI ONE DIMENSIONAL CONDUCTORS)

Abstract

The superconducting transition curves measured at various current densities in TaSe_3 were found to show the strong current density, J, dependence. In the high J regime the superconducting transition curve was consistent with published ones, but in the low J regime the resistance increases rapidly up to a value larger than the normal one from the onset temperature of the T_c transition obtained in the high J regime and had a peak, then at low temperature than the T_c the sharp superconducting transition was observed. It is suggested that these results observed first may be a new phenomenon which is related to a superconductivity itself rather than the existance of other phases such as the charge-density-waves and the spin-density-waves phase or the localization effects.