Fig. 1: Diluted lattices.
From: Topological magnetism in diluted artificial adatom lattices

a, b Schematic representation of the magnetic adatoms positioned in both investigated lattice types, (A) the rectangular lattice with the first (second) nearest neighbors atoms separated by 0.66 nm (0.93 nm), and (B) the rhombic lattice with the first nearest neighbors set 0.87 nm apart. Note that the lattices were built experimentally as reported in ref. 68.