Fig. 1: Connection between chirality in real and reciprocal space in PdGa. | Nature Communications

Fig. 1: Connection between chirality in real and reciprocal space in PdGa.

From: Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa

Fig. 1

a Crystal structure for both PdGa enantiomers. Gray and blue atoms correspond to Pd and Ga, respectively. The handedness can be distinguished considering the helix formed by Ga atoms; b Schematic line cut showing the symmetry-protected band crossing at Γ and R points, respectively. The Chern number associated to the nodes reverts its sign by mirror operation. c Fermi arcs developing on the surface for the two different enantiomers as a result of the surface-bulk connectivity. d Topographic overview of the PdGa (001) surface. The line profile evidence the minimum step height, corresponding to half unit cell. The two possible surface terminations, labeled I and II, are reported in the inset. The scalebar corresponds to 20 nm. e Atomically resolved images for crystals of opposite handedness. The perturbation developing around native defects cannot be superimposed to its mirror image. The scalebar corresponds to 5 nm. f Comparison between experimental (red line) and theoretical (blue line) local density of states.

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