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ÎÒÏÖÔÚÕýÓÃabinit½Ì³ÌÖеÄlesson on static non-linear properties¼ÆËã¾§ÌåµÄ·ÇÏßÐÔÏìÓ¦£¨·ÇÏßÐÔ¹âѧϵÊý£©£¬¼ÆËã½á¹ûºÍʵÑéÖµÓеã²î±ð£¬¿´µ½²Î¿¼ÎÄÏ×ÉÏÓÐÓüôµ¶ÐÞÕýµÄ¡£µ«ÊÇscissÕâ¸ö²ÎÊýtypical use is for response to electric field (rfelfd=3), but NOT for d/dk (rfelfd=2) and phonon responses£¬¡£ÔÚFAQÖÐҲ˵ÔÚ¼ôµ¶ÐÞÕýscissÒýÈëµÄʱºò£¬rfphon 1 ºÍ rfelfd 1¼ÆËãÓ¦¸Ã·Ö±ð¼ÆËã¡£ÇëÎÊÎÒÕâ¸öÊäÈëÎļþÖÐÔõÑùÒýÈë¼ôµ¶²î£¿ÊÇ·ñÐèÒª´ó·ù¶È¸Ä¶¯ÊäÈëÎļþ£¿

ÒÔÏÂÊÇÎÒµÄ .inÎļþ
   ixc         3
#Parameters of the SCF cycles
#****************************
   iscf        5
   nstep       100

#Plane wave basis and k-point grid
#*********************************
   ecut        56
   ecutsm      0.5
   dilatmx     1.05
   ngkpt       7 7 7
   nshiftk     1
   shiftk      0 0 0
              

ndtset 5     jdtset 1 2 3 4 5

#DATASET1 : scf calculation: GS WF in the BZ
#********************************************
   prtden1    1
   kptopt1    1
   toldfe1    1.0d-12
#DATASET2 : non scf calculation: GS WF in the whole BZ
#*****************************************************
   getden2    1
   kptopt2    2
     iscf2   -2
   getwfk2    1
   tolwfr2    1.0d-22
    nband2    26

#DATASET3 : ddk on the MP grid of k-points
#*****************************************
   getwfk3    2
    rfdir3    1 1 1
   rfelfd3    2
   tolwfr3    1.0d-22
    nband3    26
   kptopt3    2

#DATASET4 : ddE on the MP grid of k-points
#*****************************************
   prtden4    1
   getwfk4    2
   getddk4    3
    rfdir4    1 1 1
   rfphon4    1
  rfatpol4    1 8
   tolvrs4    1.0d-12
   rfelfd4    3
    nband4    26
   kptopt4    2
  prepanl4    1
#DATASET5 : 3DTE calculation
#***************************
   getden5    1
  get1den5    4
   getwfk5    2
   get1wf5    4
    nband5    26
   kptopt5    2
optdriver5    5
  rf1elfd5    1
  rf1phon5    1
rf1atpol5    1 8
   rf1dir5    1 1 1
  rf2elfd5    1
   rf2dir5    1 1 1
  rf3elfd5    1
   rf3dir5    1 1 1

nbdbuf 0

#define the crystaline
ntypat 3

znucl       30.00000  32.00000   15.00000
natom 8
acell      9.8122000262E-01  9.8122000262E-01  9.8122000262E-01 Bohr
rprim     
-5.1636766581E+00  5.1636766581E+00  1.0118349606E+01
5.1636766581E+00  -5.1636766581E+00  1.0118349606E+01
5.1636766581E+00  5.1636766581E+00  -1.0118349606E+01
typat      1  2  3  3  1  2  3  3
scalecart 3*1
xred      
5.0000000000E-01  5.0000000000E-01  0.0000000000E+00  
0.0000000000E+00  0.0000000000E+00  0.0000000000E+00  
3.7500000000E-01  3.6780769517E-01  4.9280769517E-01  
1.1780769517E-01  6.2500000000E-01  9.9280769517E-01  
2.5000000000E-01  7.5000000000E-01  5.0000000000E-01  
7.5000000000E-01  2.5000000000E-01  5.0000000000E-01  
8.7500000000E-01  8.8219230483E-01  5.0719230483E-01  
6.3219230483E-01  1.2500000000E-01  7.1923048258E-03
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