Fig. 2: Schematic representation of strained honeycomb lattices.
From: Quantized valley Hall response from local bulk density variations
Honeycomb lattice with zig-zag terminations along the x-direction and Nx = 3 primitive cells of area \({A}_{c}=3\sqrt{3}{a}^{2}/2\). The vectors connecting neighboring sites are denoted as δj. a Strain is applied by mechanically stretching the lattice. b Strain is directly imprinted on the tunneling amplitudes tj(r) without modifying the underlying crystalline structure of the lattice.
