Consider a two-dimensional hexagonal lattice: (a) Find Fermi wave vector of the free electron circular Fermi surface...

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Electrical Engineering

Consider a two-dimensional hexagonal lattice:

(a) Find Fermi wave vector of the free electron circular Fermisurface in reciprocal space.

(b) Draw the free electron Fermi surface in the reduced zonescheme when the lattice points are occupied by atoms with:

i. One valence electron/atom.

ii. Two valence electrons/atom.

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