In a non-local pseudopotential in the KB form (the one used by ESPRESSO codes) the angular momentum dependent part of the PP is described in term of projectors. Each projector carries an angular momentum label to which it applies.
If you want to generate a local pseudopotential you can do it using zero projectors. An example of such local pseudopotentials are H.blyp-vbc.UPF and H.pz-vbc.UPF in http://www.pwscf.net/pseudo.htm However, reasonably accurate local pseudopotentials can be obtained for very few elements. stefano de Gironcoli wjyin at fudan.edu.cn wrote: > The other is, > Is there any input parameter which determins the maximum angle >momentum for used pseudopotential. For a simple example, I just want >to use l=0 pseudopotential for all valence electrons calculation. > > >
