########################################################
#  Test for: PAW+DFPT - GGA
#    Crystalline AlAs : phonons & dielectric tensor
#                                          MT, aug. 2018
########################################################
   ixc 11                # Force GGA (not necessary)

   ndtset 6

#Set 1 : ground state self-consistency

  rfphon1   0            # Cancel default
  getwfk1   0            # Cancel default
    nqpt1   0            # Cancel default
  kptopt1   1            # Automatic generation of k points with symmetries
  tolvrs1   1.0d-15      # SCF stopping criterion (modify default)
   prtwf1   1

#Set 2 : Response function calculation of d/dk wave function

  rfphon2   0          # Cancel default
  rfelfd2   2          # Calculate d/dk wave function only
  kptopt2   2          # Use time-reversal symmetry for k-points
    iscf2   -3         # Need this non-self-consistent option for d/dk
  tolwfr2   1.0d-25    # SCF stopping criterion (modify default)
   prtwf2   1

#Set 3: Response function calculation to electric field

  rfphon3   0          # Cancel default
  rfelfd3   3          # Response to electric field only
   rfdir3   1 1 1      # Do all directions (symmetry will be used)
  getwfk3   1          # Use GS wave functions from dataset 1
  getddk3   2          # Use DDK wave functions from dataset 2
  kptopt3   2          # Use time-reversal symmetry for k-points

#Set 4 : Response function calculation of Q=0 phonons

  rfphon4   1          # Do phonon response
 rfatpol4   1 2        # Treat displacements of all atoms
   rfdir4   1 1 1      # Do all directions (symmetry will be used)
  getwfk4   1          # Use GS wave functions from dataset 1
  getddk4   2          # Use DDK wave functions from dataset 2
  kptopt4   2          # Use time-reversal symmetry for k-points

#Sets 5-6 : Finite-wave-vector phonon calculations (defaults for all datasets)

   rfphon   1          # Do phonon response
  rfatpol   1 2        # Treat displacements of all atoms
    rfdir   1 1 1      # Do all directions (symmetry will be used)
   getwfk   1          # Use GS wave functions from dataset 1
   kptopt   3          # Need full k-point set for finite-Q response
    prtwf   0          # Do not print WF

#Incomplete set of symmetry-inequivalent qpt chosen to be commensurate
# with kpt mesh so that only one set of GS wave functions is needed.
     nqpt   1
     qpt2   0.00000000E+00  0.00000000E+00  0.00000000E+00
     qpt3   0.00000000E+00  0.00000000E+00  0.00000000E+00
     qpt4   0.00000000E+00  0.00000000E+00  0.00000000E+00
     qpt5   2.50000000E-01  0.00000000E+00  0.00000000E+00
     qpt6  -2.50000000E-01  5.00000000E-01  2.50000000E-01
#    Following q-points complete the q-point set (not used here)
#    qpt7   2.50000000E-01  2.50000000E-01  0.00000000E+00
#    qpt8   5.00000000E-01  2.50000000E-01  0.00000000E+00
#    qpt9  -2.50000000E-01  2.50000000E-01  0.00000000E+00
#    qpt10  5.00000000E-01  5.00000000E-01  0.00000000E+00
#    qpt11  5.00000000E-01  0.00000000E+00  0.00000000E+00


#######################################################################
#Common input variables

#Definition of the unit cell
    acell   3*10.61
    rprim   0.0  0.5  0.5
            0.5  0.0  0.5
            0.5  0.5  0.0
#Definition of the atom types
   ntypat   2
    znucl   13 33
#Definition of the atoms
    natom   2
    typat   1 2
     xred   0.0  0.0  0.0
            0.25 0.25 0.25
#Number of band
    nband   4
#Definition of the planewave basis set
     ecut   3.0
#Definition of the k-point grid
    ngkpt   4  4  4
  nshiftk   4
   shiftk   0.0 0.0 0.5
            0.0 0.5 0.0
            0.5 0.0 0.0
            0.5 0.5 0.5
#Definition of the SCF procedure
    nstep   25
   diemac   9.0
   tolvrs   1.0d-8
#PAW parameters
pawecutdg   9.
 pawxcdev   0    # This a restriction for PAW+DFPT+GGA

 pp_dirpath "$ABI_PSPDIR"
 pseudos "Pseudodojo_paw_pbe_standard/Al.xml, As.GGA_PBE-JTH_sp.xml"

#%%<BEGIN TEST_INFO>
#%% [setup]
#%% executable = abinit
#%% [files]
#%% files_to_test = 
#%%   t51.out, tolnlines = 12, tolabs = 1.1e01, tolrel = 1.e-2, fld_options = -easy
#%% [paral_info]
#%% max_nprocs = 10
#%% [extra_info]
#%% authors = M. Torrent
#%% keywords = PAW, DFPT, DDK
#%% description = 
#%%   Computation of phonons and response to electric field within PAW and GGA (both q=0 and q/=0)
#%%   Test on AlAs structure; Ground state, DDK and Dielectric tensor are computed.
#%%   Note: Charge neutrality is not achieved with the present dataset,
#%%   but can be easily reached by increasing some parameters (ngkpt, ecut and pawecutdg).
#%% topics = DFPT, PAW
#%%<END TEST_INFO>