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Typing make ph from the root QUANTUM ESPRESSO directory, or make 
from the PHonon directory, produces the following codes:
- PH/ph.x: Calculates phonon frequencies and displacement patterns,
    dielectric tensors, effective charges (uses data produced by pw.x). 
- PH/dynmat.x: applies various kinds of Acoustic Sum Rule (ASR),
    calculates LO-TO splitting at 
 = 0 in insulators, IR and Raman
    cross sections (if the coefficients have been properly calculated),
    from the dynamical matrix produced by ph.x = 0 in insulators, IR and Raman
    cross sections (if the coefficients have been properly calculated),
    from the dynamical matrix produced by ph.x
- PH/q2r.x: calculates Interatomic Force Constants (IFC) in real space
    from dynamical matrices produced by ph.x on a regular q-grid 
- PH/matdyn.x: produces phonon frequencies at a generic wave vector
    using the IFC file calculated by q2r.x; may also calculate phonon DOS, 
    the electron-phonon coefficient λ, the function 
α2F(ω)
- PH/lambda.x: also calculates λ and 
α2F(ω),
   plus Tc for  superconductivity using the McMillan formula
- PH/alpha2f.x: also calculates λ and 
α2F(ω).
  It is used together with the optimized tetrahedron method
  (occupations="tetrahedra_opt"in pw.x) and shifted q-grid
  (lshiftq=.true.in ph.x).
- PH/fqha.x: a simple code to calculate vibrational entropy with
   the quasi-harmonic approximation
- PH/dvscf_q2r.x: performs inverse Fourier transformation of phonon
   potential from a regular q grid to real space.
- Gamma/phcg.x:
  a version of ph.x that calculates phonons at 
 = 0 using
  conjugate-gradient minimization of the density functional expanded to
  second-order. Only the Γ ( = 0 using
  conjugate-gradient minimization of the density functional expanded to
  second-order. Only the Γ ( = 0) point is used for
  Brillouin zone integration. It is faster and takes less memory than
  ph.x, but does not support spin polarization, USPP and PAW. = 0) point is used for
  Brillouin zone integration. It is faster and takes less memory than
  ph.x, but does not support spin polarization, USPP and PAW.
Links to the main QUANTUM ESPRESSO bin/ directory are automatically generated.
 
 
 
 
 
 
 
  
 Next: 4 Using PHonon
 Up: 3 Installation
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