Silicene on Ag(111): A honeycomb lattice without Dirac bands
Silicene on Ag(111): A honeycomb lattice without Dirac bands
The discovery of (4×4) silicene formation on Ag(111) raised the question whether silicene maintains its Dirac fermion character, similar to graphene, on a supporting substrate. Previous photoemission studies indicated that the π band forms Dirac cones near the Fermi energy, while theoretical investigations found it shifted at deeper binding energy. …