Fig. 1
From: A Lieb-like lattice in a covalent-organic framework and its Stoner ferromagnetism
Lieb lattice. a A Lieb-3 lattice with four key parameters, i.e., the on-site energy difference ΔE, the dimerization interaction δ between the corner (blue) and the edge-center (red) sites, and the NN and the NNN hopping integral, t and t’, respectively. b Band structure of an ideal Lieb lattice with ΔE, δ, and t’ all equal to zero. The inset shows the projected density of states (PDOS) with blue and red lines corresponding to the corner and edge-center states, respectively. c Band structures with different positive ΔE. d Band structures with different δ
