electron phonon coupling strength

Phonons, DFPT, electron-phonon, electric-field response, mechanical response…

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Aiswarya Samal
Posts: 8
Joined: Mon Mar 18, 2019 1:56 pm

electron phonon coupling strength

Post by Aiswarya Samal » Fri Nov 08, 2019 5:42 pm

Dear Abinit Users
Kindly suggest me how to find out the electron-phonon coupling strength after the anaddb run. We are getting many output files .From which output file I can get the electron-phonon coupling strength.

mverstra
Posts: 655
Joined: Wed Aug 19, 2009 12:01 pm

Re: electron phonon coupling strength

Post by mverstra » Thu Dec 26, 2019 3:09 pm

Hello,

the easiest is in the log and main output file, if you look for the lambda averaged isotropic ep coupling strength. The A2F files contain the Eliashberg spectral function, which is frequency resolved, to show which phonons contribute to the epc, and lambda is the first inverse momend of a2F. Check the tutorial on epc, and there are many textbooks on the topic such as Grimvall and the RevModPhys by Giustino.
Matthieu Verstraete
University of Liege, Belgium

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