Lecture II : Fundamental concepts in solid state
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چکیده
In the figure above, we see a lattice of black and white atoms. These could be B and N atoms respectively for a BN-sheet. Using one of the equivalent unit cells (hashed area) and combinations of the unit vectors, ~a1 and ~a2, we can generate the entire lattice. A general translational vector in a periodic lattice can be written as the sum of integer multiples of unit vectors, ~ T (~n) = ~ T (n1, n2, n3) = n1~a1 + n2~a2 + n3~a3 (1)
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