Surface states and effects of local surface chemistry in f-electron Weyl Semimetal CeCoGe

Topological quantum materials have defining surface states whose presentation in ARPES (angle resolved photoemission spectroscopy) can depend on the sometimes irregular chemistry of the cleaved surface. Local surface structure and chemistry can produce additional effects in the band structure of novel materials probed via photoemission. CeCoGe3 is a strongly correlated f-electron Weyl semimetal (WSM) with enhanced effective mass and low-temperature magnetism. I will present both XPS (x-ray photoemission spectroscopy) and ARPES measurements of CeCoGe3, showing correlations between surface environment and local electronic structure.

Funding acknowledgement: BSF Grant 2020067