Broken SOC in electron-phonon calculation in QE-6.8

[Vahid]

Dear EPW Users,

On the QE Github page, it states that for QE-6.8


* electron-phonon calculation in the non-colinear/spinorbit case is broken

Does this refer to electron-phonon calculation with the EPW code?

I am asking this because electron-phonon calculation can also be done with the Phonon code. I asked the QE Forum but no one seems to know which code is broken.

Thank you,
Vahid

Vahid Askarpour
Department of physics and atmospheric science
Dalhousie University
Halifax, NS
CANADA

[hlee]

Dear Vahid Askarpour:

On the QE Github page, it states that for QE-6.8


* electron-phonon calculation in the non-colinear/spinorbit case is broken

Does this refer to electron-phonon calculation with the EPW code?

No, it refers to the part for e-ph calculation in the phonon code (ph.x) of the Quantum ESPRESSO.
In ph.x, I think that the e-ph calculation with non-collinear magnetism was not disabled, but it doesn't work correctly; I am not 100% sure, but I guess that it works in case of non-magnetic spin-orbit coupling.

In EPW, the evaluation of e-ph vertex works with non-magnetic spin-orbit coupling, but currently it is not implemented in case of non-collinear magnetism.

Sincerely,

H. Lee

[Vahid]

Hi hlee,

Thank you for this clarification.

Best,
Vahid