Please see this paper: https://arxiv.org/abs/cond-mat/0504077
It contains a good description of the QE implementation of electron-phonon calculation from DFPT. The second step can save a lot of computational time. This method is described in the paper mentioned above On Sat, Jan 28, 2017 at 8:52 PM, Caloma Trumica <spm...@gmail.com> wrote: > Dear All, > > I have two questions regarding the calculations of electron-phonon > interaction coefficients as described in the user guide: > > http://www.quantum-espresso.org/wp-content/uploads/Doc/ph_ > user_guide/node9.html > > 1. Is the second step, i.e. the step using a coarse k-point grid for SCF > calculations necessary? > > 2. Setting nq1, nq2, and nq3 in an input file leads to a different q-point > coordinates from that generated by the kpoints.x program. Shouldn't the > resulting coordinates be the same? > > Thanks! > > Andy (Ohio State U, Physics Department) > > _______________________________________________ > Pw_forum mailing list > Pw_forum@pwscf.org > http://pwscf.org/mailman/listinfo/pw_forum > -- *Krishnamohan Thekkepat* *Research Associate* *Indo-Korea Science and Technology Center, Bangalore, India* “We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.”- T.S Eliot
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