Exciton multiband model according to Peeters' paper M. Van Der Donck, M. Zarenia, and F. M. Peeters, Phys. Rev. B 96, 035131 (2017).
See documentation in multiband-LaTeX/multiband.pdf
drgulevich/exciton-multiband-model
Exciton multiband model according to Peeters' paper
Jupyter Notebook