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I'm trying to replicate phonon density of states (PHDOS) diagrams for some solids using Quantum Espresso. The usual way I do it is the following one:

- scf calculation at minima (pw.x)
- Calculation of dynamical matrix in reciprocal space with nq=1 or 2 (ph.x)
- Calculation of interatomic force constants in real space (q2r.c)
- Calculation of phonon frequency (matdyn.x)

Does any one know how can I get the phonon density of states at gamma point?

Thank you in advance!