compute_Natoms_per_unit_cell

sknano.core.structures.compute_Natoms_per_unit_cell(*Ch)[source] [edit on github][source]

Compute Natoms/cell=2N.

Natoms=2N=4(n2+m2+nm)dR

where N is the number of graphene hexagons mapped to the nanotube unit cell.

Parameters:*Ch

Either a 2-tuple of ints or 2 integers giving the chiral indices of the nanotube chiral vector Ch=na1+ma2=(n,m).

Returns:`2N` – Number of atoms in nanotube unit cell: N_{mathrm{atoms}} = 2N = frac{4(n^2 + m^2 + nm)}{d_R}
Return type:int