Disorder can be utilized as an effective parameter to probe the interplay between two long-range orders such as superconductivity and charge density wave. In the present work, we report the experimental evidence for filamentary superconductivity in polycrystalline $\mathrm{TiS}{\mathrm{e}}_{1.2}{\mathrm{S}}_{0.8}$ with superconducting transition $T_{\mathrm{c}}\sim 7\mathrm{K}$. This is validated from magnetization and magnetotransport measurements. Strain-induced dislocations, substitution defects, and randomly distributed Ti ions (with local moments) are considered as possible sources of disorder. A detailed analysis of the temperature-dependent resistivity evaluates the degree of disorder and the consequent localization effects. These findings are in contrast to the fact that superconductivity has not been established at ambient pressure in ${\mathrm{TiSe}}_{2-x}{\mathrm{S}}_x$ system. It is suggested that disorder serves as a stabilizing factor for the superconducting phase due to incommensuration of the charge density wave.

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• Charge density waves
• Electrical properties
• Magnetic susceptibility
• Superconductivity