Coexistence of Topological Surface States and Superconductivity in Dirac Semimetal NiTe2

The coexistence of topological bands around the Fermi level (E_{F}) and superconductivity provides a fundamental platform for exploring their interplay. However, few materials inherently display both properties. In this Letter, we demonstrate the coexistence of topological surface states at the E_{F} and superconductivity in NiTe_{2} single crystals, a material hitherto not recognized as superconducting. Quasiparticle interference measurements performed via scanning tunneling microscopy suggest the presence of topological surface states at the E_{F}, which is further corroborated by density functional theory simulations. Experimental evidence for superconductivity is provided via electronic transport measurements and specific heat capacity analyses. Our results suggest that NiTe_{2} represents a promising platform for investigating the rich interplay between topological states and superconductivity.