1 research outputs found
Realization of a two-dimensional checkerboard lattice in monolayer CuN
Two-dimensional checkerboard lattice, the simplest line-graph lattice, has
been intensively studied as a toy model, while material design and synthesis
remain elusive. Here, we report theoretical prediction and experimental
realization of the checkerboard lattice in monolayer CuN. Experimentally,
monolayer CuN can be realized in the well-known N/Cu(100) and N/Cu(111)
systems that were previously mistakenly believed to be insulators. Combined
angle-resolved photoemission spectroscopy measurements, first-principles
calculations, and tight-binding analysis show that both systems host
checkerboard-derived hole pockets near the Fermi level. In addition, monolayer
CuN has outstanding stability in air and organic solvents, which is crucial
for further device applications.Comment: Nano Letters, in pres