Fig. 1: The Brillouin zone, band structure, temperature-dependent chemical potential, and zero-field resistivity of ZrTe₅.

a The Brillouin zone of ZrTe₅. The applied current and magnetic field are parallel to the crystallographic a- and b- axes, respectively. The orientation of magnetic field is denoted as z axis throughout the text. b The band structure of ZrTe₅. c The temperature-dependent chemical potential with different doping densities n₀ indicated by different colors. ZrTe₅ with n₀ > 0 is electron-doped while n₀ < 0 means hole-doped ZrTe₅.The low and high horizontal black dashed lines denote the valence band maximum (VBM) = −40 meV and conduction band minimum (CBM) = 33 meV, respectively. The green dash line is the extrapolated chemical potential of n₀ = 0 cm⁻³ at T < 70K which cannot be well determined with non-zero energy gap. d The temperature-dependent zero-field resistivity with different doping densities. The inset shows the resistivity of hole-doped ZrTe₅. The small black square denotes the peak of resistivity. We use a color bar to indicate the relation between colors and doping densities.