Chern Insulator: Topological Band Theory (QWZ Model)

Qi-Wu-Zhang 2D Chern insulator: H(k) = sin(kx)σx + sin(ky)σy + (m+cos(kx)+cos(ky))σz. Berry curvature integrated over BZ gives Chern number C ∈ {−1,0,+1}.

Mass parameter m: -1.50

BZ resolution: 20×20

Press Compute to calculate Berry curvature and Chern number