Composition-dependent bulk properties of intercalated transition metal dichalcogenides $Co_{1/3(1\pmδ)}NbS_{2}$

We report a systematic study of the composition-dependent bulk properties in $Co_{1/3(1\pmδ)}NbS_{2}$ single crystals across a series of precisely controlled cobalt compositions with -4%<$δ$<8%. By tuning the cobalt stoichiometry, we find that the topological Hall effect is critically sensitive to t