Re: [SIESTA-L] Adding point charges

[Oleksandr Voznyy]

>In the way you suggested me, I will still have a an atom with a basis 
set. Is it possible to have a point charge (a pseudopotential) without a 
basis set?

I think SIESTA cannot add a pseudo without introducing a basis for it.
Why exactly do you need that?
If you want simply save computation time you can introduce a small 
basis, like SZ, for it.
If it is about comparing charge/no charge situations with a consistent 
basis, you can have a basis without a pseudo instead (so called 'ghost' 
atoms as used for BSSE corrections in binding energy calculations).