Fig. 2: Topological indexes and Wilson fermions.
From: Realization of Wilson fermions in topolectrical circuits
a The Chern number \({{{{{\mathcal{C}}}}}}\) steps as a function of the dispersionless mass Δ. The red stars and circle represent \({{{{{\mathcal{C}}}}}}=\pm \!\frac{1}{2}\) and \({{{{{\mathcal{C}}}}}}=0\), corresponding to quantum anomalous semimetal and normal semimetal phases, respectively. b The first Brillouin zone and the typical band structures for Δ = −2.5, −2, −1.5, −1, −0.5, 0, 0.5, respectively, corresponding to different parameter intervals in (a). The orange and blue curves indicate the two branches of band structures. c The spin textures of Wilson fermions in the momentum space.
