[Pw_forum] uncertainty about the *.dynG file :what is "cubic" mean ? and what is the difference between *.dyn and *. matdyn file ?

[xu yuehua]

hi all :
In the *.dynG file ,there is "cubic" ,i don know what is meaning ,because my
cell is not the type as you can see my scf file



-------------------------------------dynG.FILE------------------------------

Dynamical matrix file

  2   15  0 38.1852405  0.0000000  0.0000000  0.0000000  0.0000000
0.0000000
cubic
      0.866025710    0.499999470    0.000000000
      0.000000000    0.999998940    0.000000000
      0.000000000    0.000000000    0.143563323

------------------------------------------------------------------------scf
file -----------------------------------
this is the scf output :

bravais-lattice index     =            0
     lattice parameter (a_0)   =      38.1852  a.u.
     unit-cell volume          =    6922.4594 (a.u.)^3
     number of atoms/cell      =           15
     number of atomic types    =            2
     kinetic-energy cutoff     =      29.9874  Ry
     charge density cutoff     =     200.0000  Ry
     convergence threshold     =      1.0E-09
     beta                      =       0.2000
     number of iterations used =            8  plain     mixing
     Exchange-correlation      =  SLA  PW   PBE  PBE (1434)
     celldm(1)=  38.185240  celldm(2)=   0.000000  celldm(3)=   0.000000
     celldm(4)=   0.000000  celldm(5)=   0.000000  celldm(6)=   0.000000

     crystal axes: (cart. coord. in units of a_0)
               a(1) = (  0.866026  0.499999  0.000000 )
               a(2) = (  0.000000  0.999999  0.000000 )
               a(3) = (  0.000000  0.000000  0.143563 )











-- 
Xu Yuehua
physics Department of Nanjing university
China
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