IGNOU PHE 13 2026 - Draw the first Brillouin zone for a 2D oblique reciprocal lattice.

Question

Draw the first Brillouin zone for a 2D oblique reciprocal lattice.

29 Jan 2026

Answer :

Word Count : 250

In two dimensions an oblique lattice is defined by two non-orthogonal primitive translation vectors, and its reciprocal lattice is also oblique with primitive reciprocal vectors b₁ and b₂ inclined at an arbitrary angle. The first Brillouin zone is constructed as the Wigner–Seitz cell of this reciprocal lattice around the origin. Starting from the origin O

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