Identification of topological nodal lines by ARPES in Weyl Semimetal CeCoGe₃

Topological materials are characterized by a unique band structure consisting of symmetry protected nodal features and surface states. One such feature is the topological nodal line (TNLs) in which the symmetry protected band crossings have a 1D dispersion throughout the 3D Brillouin zone. Angle resolved photoemission spectroscopy (ARPES) is particularly suited for identifying the presence of topological features by direct measurement of the electronic band structure within a material. The non-centrosymmetric Weyl Semimetal CeCoGe₃ hosts many topological features including TNLs as well as strong electronic correlations, offering a rich platform for emergent physics. However, the presence, number, and character of the TNLs has not been throughly studied in CeCoGe₃. Using circular dichroism ARPES we aim to locate and characterize the many predicted topological features and their interplay with strong correlations in CeCoGe₃.