graphene_flake

sisl.geom.graphene_flake(shells: int, bond: float = 1.42, atoms: sisl.typing.AtomsLike = None, vacuum: float = 20.0) → Geometry

Hexagonal flake of graphene, with zig-zag edges.

Parameters:

shells (int) – Number of shells in the flake. 0 means a single hexagon, and subsequent shells add hexagon units surrounding the previous shell.
bond (float) – bond length between atoms (not lattice constant)
atoms (sisl.typing.AtomsLike) – the atom (or atoms) that the honeycomb lattice consists of. Default to Carbon atom.
vacuum (float) – Amount of vacuum to add to the cell on all directions

Return type:

Geometry