Fig. 2: Structure of the Si/Ag(001) system.
From: Observation of gapped Dirac cones in a two-dimensional Su-Schrieffer-Heeger lattice
a LEED pattern of Si grown on Ag(001). Red circles indicate the diffraction patterns from the 1 × 1 lattice of Ag(001). Si forms a 3 × 3 superstructure with respect to the substrate. b Schematic drawing of the BZs of Si and Ag(001). c Relaxed structure model of Si/Ag(001). Blue and gray balls indicate the Si and Ag atoms, respectively. d Simulated STM image of Si/Ag(001) at bias voltage of −1 eV.
