Coexistence of Superconductivity and CDWs in Nb_<1-x>Ta_xSe_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 temperature T_c and the sizes of the resistive anomalies due to both q_1- and q_2-CDW formations were examined in single crystals of Nb_<1-x>Ta_xSe_3. As Ta-concentration increases the sizes of the resistive anomalies decrease but that due to the q_1-CDW begins to increase at 5 at%. On the contrary, Tc initially increases but it also turns to decrease at the same concentration. The results are discussed in terms of the correlation between superconductivity and CDWs.