“…The DP3 here is located closer to E F than that of along Γ-X direction (DP2, −432 meV), similar to other isostructural compounds [20, 23-25, 32, 35, 42]. According to theoretical calculations [21,30,31] and photon energy dependent ARPES measurements of ZrSiS , ZrGeTe [23] and ZrSnTe [27], the linear Dirac bands along Γ-X and X-M directions are originated from bulk and surface states, respectively, which cross at X point with different energies. Besides, the Fermi wave vector along X-M direction k F,XM = 0.038 (1/Å) (figure 4(b)) is smaller than the inner bands along Γ-X direction k F,ΓX,inner = 0.100 (1/Å) (figure 4(a)), in consistence with the elliptical FS property around X point (figure 2(a)).…”