Question: Consider a two-dimensional triangular lattice described by the two primitive vectors (in an orthogonal coordinate system) a1=a(1,0);a2=a(21,23). Find the two primitive lattice vectors b1,b2 describing

Consider a two-dimensional triangular lattice described by the two primitive vectors

Consider a two-dimensional triangular lattice described by the two primitive vectors (in an orthogonal coordinate system) a1=a(1,0);a2=a(21,23). Find the two primitive lattice vectors b1,b2 describing the reciprocal lattice. Find the area of the 1st Brillouin zone and find its relation with the area of the direct lattice unit cell

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