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zbo007

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[求助] abinit 计算声子谱,第四步出现问题求助!

第二步用的 nqpt   1            # One qpt for each dataset (only 0 or 1 allowed)
                         # This is the default for all datasets and must
                         #  be explicitly turned off for dataset 1.

     qpt2   0.00000000E+00  0.00000000E+00  0.00000000E+00
     qpt3   0.00000000E+00  0.00000000E+00  0.00000000E+00
     qpt4  -1.25000000E-01 -2.50000000E-01  0.00000000E+00
     qpt5  -1.25000000E-01  5.00000000E-01  0.00000000E+00
     qpt6  -2.50000000E-01 -3.75000000E-01  0.00000000E+00
     qpt7  -1.25000000E-01 -3.75000000E-01  1.25000000E-01
     qpt8  -1.25000000E-01  2.50000000E-01  0.00000000E+00
     qpt9  -2.50000000E-01  3.75000000E-01  0.00000000E+00
     qpt10 -3.75000000E-01  5.00000000E-01  0.00000000E+00
     qpt11 -2.50000000E-01  5.00000000E-01  1.25000000E-01
     qpt12 -1.25000000E-01  0.00000000E+00  0.00000000E+00
     qpt13 -3.75000000E-01  0.00000000E+00  0.00000000E+00  
然后mrgddb < al_3.in,第四步anaddb < al_4.files > al_4.log,出现
symdm9.F90:213:ERROR
   Informations are missing in the DDB.
  The dynamical matrix number     2 cannot be built,
  since no blok with wavevector    0.000000E+00    2.500000E-01    2.500000E-01
  has been found.
  Action : add the required blok in the DDB, or modify your input file
第四步的文件为:
!Input file for the anaddb code. Analysis of the al DDB                       

!Flags
ifcflag   1     ! Interatomic force constant flag

!Wavevector grid number 1 (coarse grid, from DDB)
  brav    2      ! Bravais Lattice : 1-S.C., 2-F.C., 3-B.C., 4-Hex.)
  ngqpt   4 4 4   ! Monkhorst-Pack indices
  nqshft  1         ! number of q-points in repeated basic q-cell
  q1shft  3*0.0

!Effective charges
     asr   1     ! Acoustic Sum Rule. 1 => imposed asymetrically
  chneut   1     ! Charge neutrality requirement for effective charges.

!Interatomic force constant info
  dipdip  1      ! Dipole-dipole interaction treatment
  ifcana  1      ! Analysis of the IFCs
  ifcout 20      ! Number of IFC's written in the output, per atom
  natifc  1      ! Number of atoms in the cell for which ifc's are analysed
   atifc  1      ! List of atoms
  
# This line added when defaults were changed (v5.3) to keep the previous, old behaviour
  symdynmat 0
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