Visualizing higher-fold topology in chiral crystals

Understand

Novel topological phases of matter are fruitful platforms for the discovery of unconventional electromagnetic phenomena.

• Higher-fold topology is one example, where the low-energy description goes beyond Standard Model analogs.
• Despite intensive experimental studies, conclusive evidence remains elusive for the \textit{multi-gap topological nature of higher-fold chiral fermions}.
• In this Letter, we leverage a combination of fine-tuned chemical engineering and photoemission spectroscopy with photon energy contrast to discover the higher-fold topology of a chiral crystal.