M should be the nuclear mass, if I remember correctly (these formulas are valid for crystals with a single kind of atoms, if I remember correctly)
P. On Sat, 2014-05-17 at 18:02 +0530, Sridhar Sadasivam wrote: > 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 > _______________________________________________ > Pw_forum mailing list > Pw_forum at pwscf.org > http://pwscf.org/mailman/listinfo/pw_forum -- Paolo Giannozzi, Dept. Chemistry&Physics&Environment, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222
