Dear SIESTA users, could you please explain me the sense of MeshCutoff parameter in SIESTA? The manual is short in this respect: ------------- MeshCutoff: Defines the equivalent plane wave cutoff for the grid. Default value: 100 Ry ------------- I can understand energy cutoff parameter in plane-wave based codes like VASP, it just controls the number of plane waves used to render wavefunctions. Thus, in VASP it actually controls the accuracy of calculation. But SIESTA is based on atomic orbitals.
So what this parameter actually does in SIESTA? Should the calculation be converged relative to this parameter? Any recommendations? Kind regards Ruslan
