sknano.structures.compute_psi

sknano.structures.compute_psi(n, m)

Compute rotation component of symmetry operation \(\psi\) in radians.

\[\psi = \frac{2\pi}{N}\]

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:

float

Rotation component of symmetry operation \(\psi\) in radians.