a Powder (black curve) and single crystal (red curve) XRD pattern of PtBi1.6 compared with the standard pattern for P31m (blue column).10 Inset: Picture of PtBi1.6 single crystals. b Temperature dependence of the ab-plane resistivity ρab. The solid line is the fit of data to the BG formula. Inset: ρab(T) below 20 K and fitting curve (solid line). c Temperature dependence of ρab(T) under different fields with H // c. The dashed line represents 3.5ρab(T, H = 0). Inset: field dependence of n and A. d Kohler plot: MR versus H/ρab(T, H = 0). The solid line is the fit to MR = 50(H/ρab(0))1.4. e dρab/dT as a function of temperature in the indicated fields. Two characteristic temperatures Tm (at which dρab/dT = 0) and Ti (at which dρab/dT is the minimum) are marked by arrows. f Field dependence of temperatures Tm and Ti (the error bars are estimated based on the nearest Tm or Ti intervals). The dashed line is the fit of Tm to Tm = 13.8(H−Hc)0.23.