Yes, that issue (using smearing in berry phase calculations) is known and honestly annoying - for magnetic insulators I have to do extra steps in order to compute polarization.


15.11.2020, 23:34, "Paolo Giannozzi" <[email protected]>:
On Sat, Nov 14, 2020 at 9:13 PM Sergey Lisenkov <[email protected]> wrote:

Question: Does QE perform a check for the structure to be insulator before proceeding with Berry phase calculation?

No: QE complains and stops if you try a Berry phase calculation in a  crystal treated as a metal (with tetrahedra or broadening), but it does not check whether the crystal you assumed to be an insulator is really one.

Paolo
--
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222

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