qery about number of dynamical matrices

General discussion around the EPW software

Moderator: stiwari

Post Reply
topgun
Posts: 36
Joined: Thu Aug 03, 2017 1:23 pm
Affiliation:

qery about number of dynamical matrices

Post by topgun »

Dear sir,
In some codes like ELK, while calculating superconducting transition temperature, by supercell method , hundered of dynamic matrices are formed e.g in case of a AB3 material [with 4 atoms in unit cell ] 120 dynamic matrices were formed.

does similar number of dynamical matrices are formed while calculating in EPW CODE. or Is it just specific to supercell method and not for DFPT.

top gun

sponce
Site Admin
Posts: 616
Joined: Wed Jan 13, 2016 7:25 pm
Affiliation: EPFL

Re: qery about number of dynamical matrices

Post by sponce »

Dear topgun,

It depend.
In the case of QE/EPW, the number of dynamical matrices depend on your q-point grid. The denser the q-point grid the more dynamical matrices you will have.

Best wishes,
Samuel
Prof. Samuel Poncé
Chercheur qualifié F.R.S.-FNRS / Professeur UCLouvain
Institute of Condensed Matter and Nanosciences
UCLouvain, Belgium
Web: https://www.samuelponce.com

topgun
Posts: 36
Joined: Thu Aug 03, 2017 1:23 pm
Affiliation:

Re: qery about number of dynamical matrices

Post by topgun »

thanks for the reply

top gun

Post Reply