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1
What is the reciprocal lattice?
The lattice formed by wavevectors that satisfy Bragg scattering conditions.
2
What is the defining relation between real and reciprocal lattice vectors?
aᵢ·bⱼ = 2πδᵢⱼ.
3
What is the physical meaning of the reciprocal lattice?
It represents allowed momentum transfers in diffraction.
4
What is a Wigner–Seitz cell?
The region closer to a given lattice point than any other.
5
What is the first Brillouin zone?
The Wigner–Seitz cell of the reciprocal lattice.
6
What is the reciprocal lattice of a square lattice?
A square lattice.
7
Where are Brillouin zone boundaries located?
Halfway between reciprocal lattice points.
8
Why are Brillouin zone boundaries important?
They correspond to Bragg reflection and band gap formation.
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