update

Tutorial/4_bands_of_zigzag_graphene.py

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+import gjh
+import numpy as np
+from math import *
+import functools
+
+x = np.linspace(-pi, pi, 100)
+Ny = 10
+unit_cell = gjh.finite_size_along_two_directions_for_graphene(1, Ny)
+hopping = gjh.hopping_along_zigzag_direction_for_graphene(Ny)
+hamiltonian_function = functools.partial(gjh.one_dimensional_fourier_transform, unit_cell=unit_cell, hopping=hopping)
+eigenvalue_array = gjh.calculate_eigenvalue_with_one_parameter(x, hamiltonian_function)
+gjh.plot(x, eigenvalue_array, xlabel='k', ylabel='E')