Fig. 3: Spectrum of a uniaxially strained honeycomb lattice.
From: Quantized valley Hall response from local bulk density variations
Energies ε of the Hamiltonian in Eq. (1) in units of hopping parameter t for τ = 0 (gray lines) and τ = 70.84 × 10−4 (colored lines). We have used Nx = 301 cells along the x-direction and zigzag terminations. For finite strain, the color scale indicates the mean position 〈x〉 of each state. The black dashed lines represent the pseudo-Landau levels (pLLs) whose approximate dispersion is given by Eq. (5).
