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sknano.structures.compute_t2¶

sknano.structures.compute_t2(*Ch)[source][source]

Compute $$t_2 = -\frac{2n + m}{d_R}$$

where $$d_R = \gcd{(2n + m, 2m + n)}$$.

The component of the translation vector $$\mathbf{T}$$ along $$\mathbf{a}_2$$:

$\mathbf{T} = t_1\mathbf{a}_1 + t_2\mathbf{a}_2$
Parameters: *Ch : {tuple or ints} Either a 2-tuple of ints or 2 integers giving the chiral indices of the nanotube chiral vector $$\mathbf{C}_h = n\mathbf{a}_1 + m\mathbf{a}_2 = (n, m)$$. int $$t_2$$