Topological phase diagrams and Majorana zero modes of the Kitaev ladder and tube

Wang Yiming¹, Li Zhidan¹, Han Qiang^{1, 2, †}

(color online) Phase diagrams of the 4-leg and 5-leg Kitaev ladder models. t_x is chosen as energy unit. Δ x = 0.8 and Δ y = 0.6 . The integer numbers in the figure represent the Z index. In the regions where t y < Δ y , the topological indices are 0,2,4 for M = 4 (upper panel) and 0,1,3,5 for M = 5 (lower panel).