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Unconventional fermions in the immensely studied topological semimetals arethe source for rich exotic topological properties. Here, using symmetryanalysis and first-principles calculations, we propose the coexistence ofmultiple topological nodal structure in LaSb2, including topological nodalsurfaces, nodal lines and in particular eightfold degenerate nodal points,which have been scarcely observed in a single material. Further, utilizing highresolution angle-resolved photoemission spectroscopy in combination withShubnikov-de Haas quantum oscillations measurements, we confirm the existenceof nodal surfaces and eightfold degenerate nodal points in LaSb2, and extractthe {\pi} Berry phase proving the non-trivial electronic band structuretopology therein. The intriguing multiple topological nodal structure mightplay a crucial role in giving rise to the large linear magnetoresistance. Ourwork renews the insights into the exotic topological phenomena in LaSb2 and itsanalogous.

Multiple topological nodal structure in LaSb2 with large linear magnetoresistance