Fig. 1: Complete atomic-scale visualization of kagome lattice in CoSn.

a Crystal structure of CoSn, which consists of a Co₃Sn kagome layer (left) and a Sn₂ honeycomb layer (right). b Cross-sectional atomic resolution scanning transmission electron microscope image of CoSn, showing the lattice stacking along the c axis as illustrated in the inset. c Topographic image of a single atomic step (bottom) and the corresponding differential conductance map obtained at a bias voltage of 100 mV (top). d Atomically resolved Sn₂ surface with the corresponding atomic lattice structures. e Atomically resolved Co₃Sn surface with the corresponding atomic lattice structures.