Fig. 1. Comparison between the (001) surface and bulk states of ZrSiS.

(A) Crystal structure of ZrSiS. (B) Schematic of the locations of the nodal surfaces (yellow planes) and nodal lines (red dashed lines) of ZrSiS in the bulk BZ. (C) Calculated surface band structures. (D) Calculated bulk band structures at k_z = 0. (E) FSs measured with hν = 42 eV. (F) Calculated surface FSs. (G) FSs measured with hν = 436 eV. (H) Calculated bulk FSs at k_z = 0. (I and J) Band dispersions along the $\overline{\mathrm{\Gamma }}$-$\overline{\mathrm{X}}$ and $\overline{\mathrm{M}}$-$\overline{\mathrm{X}}$ lines, respectively, measured with hν = 42 eV. (K and L) Band dispersions along the Γ-X and M-X lines, respectively, measured with hν = 436 eV.