[Pw_forum] question about electric field

[mashiat alaaii]

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
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