(using python) Q2. Derived from the tight-binding Hamiltonian of graphene, the band structure of graphene is composed by two branches: 7 f(ky,ky) -Yo \f(kg, kyl E: (kg,ky) and E_(kx, ky) 1 so \f(kx, ky) 1+ so \f(kx, kyll? where so = = 0.129 and 3kza kya Eya \f(ky, ky) = 1+ 4 cos 2 2 2 Plot the band structure of graphene by matplotlib. = 1. Define the dimensionless quantities: + E+/yo, E_/yo, ka = kya and k, = kya. Rewrite the above equations by t, _, k and ky. In the new equations, yo and a are eliminated. So, we don't need to know the values of 70 2. Plot & (k, y) and _(ka, ky) by plot_surface() in the same figure. and a. (using python) Q2. Derived from the tight-binding Hamiltonian of graphene, the band structure of graphene is composed by two branches: 7 f(ky,ky) -Yo \f(kg, kyl E: (kg,ky) and E_(kx, ky) 1 so \f(kx, ky) 1+ so \f(kx, kyll? where so = = 0.129 and 3kza kya Eya \f(ky, ky) = 1+ 4 cos 2 2 2 Plot the band structure of graphene by matplotlib. = 1. Define the dimensionless quantities: + E+/yo, E_/yo, ka = kya and k, = kya. Rewrite the above equations by t, _, k and ky. In the new equations, yo and a are eliminated. So, we don't need to know the values of 70 2. Plot & (k, y) and _(ka, ky) by plot_surface() in the same figure. and a