[Pw_forum] Factor M in electron-phonon coupling matrix element

[Sridhar Sadasivam]

Dear QE users and developers,

I am writing to ask for a small clarification in the formula that defines
the electron-phonon coupling matrix element (Equation 1 in the phonon user
guide:
http://www.quantum-espresso.org/wp-content/uploads/Doc/ph_user_guide.pdf )

What is 'M' in Equation 1? Is it the total mass of the unit cell?

Thanks,
Sridhar
Purdue University
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.quantum-espresso.org/pipermail/users/attachments/20140517/65f22cc8/attachment.html>