A How to calculate the degeneracy of an energy band?

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1. Jan 11, 2018

howl

Could somebody write the guide for calculate the degeneracy of energy band by group theory? For instance, the valence band of Si and Ge in Gamma point. Thanks a lot!

2. Jan 14, 2018

Aarav Sangar

3. Jan 15, 2018

howl

But it dosen't use group theory, and looks like no easy to generalize...

4. Jan 15, 2018

Dr Transport

Any group theory text will have it, Tinkham is one that comes to mind immediately.