cgnr

sisl.geom.cgnr(width: int, chirality: tuple[int, int], bond: float = 1.42, atoms: sisl.typing.AtomsLike | None = None, vacuum: float | tuple[float, float] = 20.0) → Geometry

Construction of an (n, m, w)-chiral graphene nanoribbon

Parameters:

width (int) – number of atoms in the transverse direction
chirality (tuple[int, int]) – index (n, m) corresponding to an edge with n zigzag segments followed by m armchair segments
bond (float) – C-C bond length
atoms (sisl.typing.AtomsLike | None) – atom (or atoms) in the honeycomb lattice. Defaults to Atom(6)
vacuum (float | tuple[float, float]) – separation in transverse and perpendicular direction

Return type:

Geometry