Resistivity Anomalies and Superconductivity in NbS3 (International Symposium on Nonlinear Transport and Related Phenomena in Inorganic Quasi One Dimensional Conductors) -- (Localization and Superconductivity in lD Conductors) [in Japanese]
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The dc and ac electrical conductivity measurements are reported on a quasi-one-dimensional conductor NbS_3. Sulfur-rich NbS-3 shows semiconducting property. Crystals are divided into two groups. One exhibits a resistivity anomaly around 140 K, and the other shows two successive resistivity anomalies around 235 and 140 K. Metallic NbS_3 was obtained by annealing the sulfur-rich or nearly stoichiometric crystals in a vacuum. In metallic NbS_3, existence of a superconducting phase transition below 2.15 K was observed on the basis of resistance and critical magnetic field measurements.
物性研究 41(4), p301-323, 1984-01