That is to say, the image of the mapping for the Brillouin zone of the brick-wall lattice just covers part of the Brillouin zone of the square lattice. The mapping for the wave vectors is schematically shown in Fig. 4. In Fig. 4, the left panel shows the Brillouin zone of the ...
The honeycomb lattice possesses a novel energy band structure, which is characterized by two distinct Dirac points in the Brillouin zone, dominating most of the physical properties of the honeycomb structure materials. However, up till now, the origin of the Dirac points is unclear yet. Here, we...
Unit (primitive) cell () of localized cations arranged in a honeycomb lattice with lattice constant,ashowing the primitive vectors,dxanddy. Every primitive cell is a parallelogram engulfing two (un-)occupied cationic sites, spanning partial interiors of four cationic-site hexagons. Full size image ...
Here, R = l1a1 + l2a2 is an in-plane lattice translation vector with primitive vectors a1 and a2 (see Fig. 1) and integers l1 and l2. Each meta-atom is modeled by a single dynamical degree of freedom h (with dimensions of length), where the electric-dipole moment ...