Fig. 2: Spectroscopic data showing edge state on Co3Sn plane.
From: Evidence for one-dimensional chiral edge states in a magnetic Weyl semimetal Co3Sn2S2
a Three-dimensional topography and line profile of an exposed Co3Sn surface. Note that only part of the step is shown here. The atomic-scale features represent a cluster of three nearest neighbor Co-atoms. The full step and zoomed-out image are shown in Supplement Fig. 4. b Spectroscopic heatmap of the differential conductance along the line profile shown in a. An edge state is clearly seen as indicated by the red arrow. The state is confined to the edge with an extent of approximately 1.5 nm transverse to the step edge. c Spectra on the Co3Sn plane taken at the edge (red) and away from the edge on the surface (black). A noticeable peak in the density of states at the edge exists at −60 meV along with a broad increase in the density of states below the Fermi energy, indicative of the edge mode. The color indicates the value of DOS. Spectra and topography were obtained with setpoint current I = 150 pA and voltage V = 70 meV.
