Saturday, May 12, 2018

solid state physics - Why does the Fermi Surface cross the Brillouin zone boundary at right angles?


I'm not sure why the fermi surface crosses the Brillouin zone boundary at right angles. I understand that this is normally the case, but not necessarily always.


I'm aware that the fermi surface is a constant energy surface up to the filling point. The Brillouin zone is in reciprocal space.




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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