STM calculation with VASP

First you need to have your geometry and DOS calculations done. Once that is done you need to generate a PARCHG file. This is done by adding this into the INCAR:

partial charge densities:
  LPARD = .TRUE.
  LSEPK = .FALSE.
  LSEPB = .FALSE.
  NBMOD = -3
  EINT = -1.50 0