Extended Data Fig. 5: Energy-distribution curves across the helicoid arc singularity in CoSi. | Nature Physics

Extended Data Fig. 5: Energy-distribution curves across the helicoid arc singularity in CoSi.

From: Tunable topologically driven Fermi arc van Hove singularities

Extended Data Fig. 5

a, Surface-sensitive ARPES measured Fermi surface map for CoSi. The regions of interest are labeled by colored lines, spanning across the helicoid arc. b, Energy-distribution curves (EDCs) extracted from the regions marked in panel (a). Different EDCs are taken at kb = -0.33 Å−1. The EDC obtained at ka = 0.44 Å−1 (red circles) shows a strong photoelectron intensity peak near E = − 0.03 eV, matching the helicoid arc van Hove energy in CoSi.

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