Figure 5
From: Second order topology in a band engineered Chern insulator
The Berry curvature for different values of \(\xi =\frac{t_1}{t}\) are shown over the Brillouin zone of honeycomb lattice. For (a) \(\xi =1\), the Berry curvature is confined near the K and K\('\) points of the BZ. With increasing values of \(\xi \) in (b–d) the region of high concentrations shift towards the M point. This indicates a shift in the point of minimum band gap with increasing \(\xi \). The values of the parameters t, \(t_2\), \(\phi \) and m are fixed at 1, 0.1, \(\frac{\pi }{2}\) and 0.
