Dirac cone pairs in silicene induced by interface Si-Ag hybridization: A first-principles effective band study
Dirac cone pairs in silicene induced by interface Si-Ag hybridization: A first-principles effective band study
Using density functional theory combined with orbital-selective band unfolding techniques, we study the effective band structure of silicene $(3\ifmmode\times\else\texttimes\fi{}3)$/Ag(111) $(4\ifmmode\times\else\texttimes\fi{}4)$ structure. Consistent with the ARPES spectra recently obtained by [Feng et al. Proc. Natl. Acad. Sci. USA 113, 14656 (2016)], we observe six pairs of Dirac cones near the boundary …