Dear professionals, I am a beginner and I have encountered a problem with my Haldane model. The band structure I obtained with this parameter is different from the ones obtained by others. I am not sure where the error lies and I would appreciate it if you could help me look into it. Thank you for your time and assistance. I am looking forward to hearing from you. my codes are as follows: import kwant import numpy as np from math import pi, sqrt, tanh from matplotlib import pyplot #HIDDEN_BEGIN_makesyst Haldane = kwant.lattice.honeycomb() a, b = Haldane.sublattices L=10 W=20 M=2/3 t=1 t2=1/3 phi=np.pi/4 def rec(pos): x, y = pos return 0<=x<=L and 0<=y<=W syst = kwant.Builder() syst[Haldane.shape(rec, (0, 0))] = M syst[Haldane.neighbors()] = t # add second neighbours hoppings syst[Haldane.a.neighbors()] = t2*np.exp(1j*phi) syst[Haldane.b.neighbors()] = t2*np.exp(-1j*phi) syst.eradicate_dangling() sym0 = kwant.TranslationalSymmetry(Haldane.vec((-1, 0))) def lead0_shape(pos): x, y = pos return (0