# CCL:G: Overlap matrix between ground and excited state using DFT

*From*: "Sahar Ashtari" <s.ashtari.j ~~
gmail.com>
*Subject*: CCL:G: Overlap matrix between ground and excited state
using DFT
*Date*: Sun, 20 Jun 2021 12:25:48 -0400

Sent to CCL by: "Sahar Ashtari" [s.ashtari.j++gmail.com]
Dear all,
I need to calculate the excited and
ground state overlap using DFT and TD-DFT.
Right now I am working with Orca 4.2 and
Gaussian 16. I know I can get the non-
adiabatic coupling matrix elements from
either of them which are the derivatives
of the so-called overlaps but I cannot
find a way to get the actual overlaps in
the output. Does anybody know a way to get
these values, especially with these two
packages?
Bests,
Sahar Ashtari