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HenryWhu
- 2
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Homework Statement
In solid state physics,we know all the states of free electrons can be expressed by the First Brillouin Zone. We know the $$E(k+K)=E(k)$$ where K is reciprocal lattice vector. We also know that the kinetic energy of the electron is $$E_{k}=\frac{\hbar^2k^2}{2m}$$. [/B]
Homework Equations
For electrons in the FBZ and out of the FBZ, they have different $$E_{k}$$ but same $$E$$
why?[/B]
The Attempt at a Solution
it is because they have different potential energy?[/B]