Dear all, In Bengsston's paper from 1999, it is stated that an "asymmetric slab with a net surface dipole density" requires a dipole correction. My question is whether the electrostatic potential in the vacuum region is a good marker on determining whether a dipole correction is needed. From my understanding, a dipole correction is needed if the electrostatic potential on the vacuum region is not constant (i.e. the electrostatic potential has a slope). Similarly, a dipole correction is not needed if the electrostatic potential on the vacuum region is constant. Is this correct?
Sincerely, Dae Kwang Jun
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