sknano.structures.compute_N

sknano.structures.compute_N(n, m)

Compute \(N = \frac{2(n^2+m^2+nm)}{d_R}\).

\(N\) is the number of graphene hexagons mapped to a nanotube unit cell.

Parameters:

n, m : int

Chiral indices defining the nanotube chiral vector \(\mathbf{C}_h = n\mathbf{a}_1 + m\mathbf{a}_2 = (n, m)\).

Returns:

int

Number of hexagons per nanotube unit cell: \(N = \frac{2(n^2+m^2+nm)}{d_R}\).