Hi, I think you apply the external field perpendicular to the surface. In this position the voltage difference between both side of nano structure is small. As a result the Hamiltonian of surface does not change very much and you do not observe any difference. If you want to study the presence of external electric field i suggest that use a vertical field.
On Tue, Nov 6, 2012 at 8:43 AM, mashiat alaaii <mashiatalaaii at gmail.com>wrote: > Dear all, > I am trying to understand the effect of electric field on the slab that I > prepared. > I expected to see a difference (at least a shift) in planar average of > wave function in the direction of the field after applying the field. > I applied field with several strengths to a Si/SiO2 slab with 168 Si and > 144 O atoms, and compared the planar averafege of wave function in the same > direction of field before and after applying field. Even when the field is > so strong (eamp = 0.01), the results are just the same. > I was wondering whether anybody could help me in interpreting the results. > I really appreciate your help. > M Alaaii > > > _______________________________________________ > Pw_forum mailing list > Pw_forum at pwscf.org > http://pwscf.org/mailman/listinfo/pw_forum > -- Mohsen Modarresi, PhD student of Solid State Physics, Ferdowsi University of Mashhad, Iran. Phone +98-9133452131 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://pwscf.org/pipermail/pw_forum/attachments/20121106/6ce6494c/attachment-0001.html
