Fig. 4: The (001) topological surface states (TSS).
a Surface dispersion of binary HDTM PtGa. b Topological Fermi arcs of binary HDTM PtGa with energy fixed at the energy E1 of four-fold degenerate fermion \({H}_{PG}^{\Gamma }\). c Surface dispersion of ternary HDTM PtPbTe. d Topological Fermi arcs of ternary HDTM PtPbTe with energy fixed at the energy E2 of four-fold degenerate fermion \({H}_{PPT}^{\Gamma }\). e Surface dispersion of HDTMs Pd3Pb2S2. f Topological Fermi arcs of HDTMs Pd3Pb2S2 with energy fixed at the energy E3 of four-fold degenerate fermion \({H}_{PPS}^{\Gamma }\). The green, blue, and red dots are four-fold, six-fold, and three-fold degenerate fermion, respectively.
