[CP2K-user] Valence band maximum regarding to electrostatic potential
i.a.b... at gmail.com
i.a.b... at gmail.com
Fri Apr 19 05:00:26 UTC 2019
Hi all!
I need to calculate bands line up for heterojunction. And there is a method
which is described in Van de Walle's work (Physical Review B V. 34 N. 8 15
oct. 1986 "Theoretical calculation of heterojunction discountinuties in the
Si/Ge system"). The 1st step of this method is to perform band structure
calculation of pure materials and from this calculation authors obtain how
far is maximum of valence band (VBM) from mean electrostatic potential
(MEP) of material.
So, the question arises how values in *.bs file are connected with mean
electrostatic potential? Is it correct to consider, that for pure material
mean electrostatic potential is zero and thus values in *.bs file are
absolute? Or there should be another approach to obtain the difference
(VBV-MEP)?
Thx in advance!
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