[Pw_forum] Questions about the DFPT review paper
spmmal at gmail.com
Fri Oct 26 02:25:46 CEST 2012
Can someone help answer my questions. Thank you so much!
On Wed, Oct 24, 2012 at 7:38 PM, Caloma Trumica <spmmal at gmail.com> wrote:
> Dear all,
> I do not understand why the two highlighted places in the attached DFPT
> review paper are correct.
> I repeat my questions here:
> 1. Why the contributions from valence bands cancel each other?
> 2. Why the left side of Eq.25 has a null eigenvalue?
> Thank you!
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