I have a doubt regarding, why changing of position in brillouin zone changes the energy levels? This is because there is a change in the wave functions at every point in brillouin zone. But why is wave function changes? Here, I have attached band structure of 'Si'.
How can we identify the s, p, d, f orbitals by looking at the image? Under which condition it on crystal dimensions, it will nearly stop wiggling?
Please, clarify my doubts.Thanks!