# Parameter Dependance of Bandgaps

| Shown are numerical results for the Kronig–Penney model.
|  | The parameter a can be varied to quantify the strength of the periodic lattice potential.
| alpha: |  |  |  |  |  |  |  |
|  | The red curve shows the dispersion relation of the free electron gas, i.e. it's a parabolic function.
|  | The blue curve shows the dispersion relation with band gaps.
|  | The green curve shows the same dispersion relation in the reduced representation.

With frame

2.1.4 Periodic Potentials

© H. Föll (Semiconductors - Script)