Fig. 1: Basic characterizations of Co1/3NbS2.

a The crystal structure of Co1/3NbS2 viewed along the axis perpendicular to the bc-plane. b The measured temperature-dependent out-of-plane susceptibility of single crystal Co1/3NbS2 bulk with ZFC, 0.1 T FC, and 3 T FC. c RMCD signal versus temperature of an exfoliated Co1/3NbS2 flake with a thickness of ~130 nm. The error bars for each data point were obtained by calculating the standard deviation of 150 consecutive measurements. Red hatching highlights the phase transition, which is used to guide the eye. d Transverse resistivity ρyx versus out-of-plane magnetic field of device 1 at different temperatures, where the anomalous and ordinary Hall coefficients can be extracted.