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xli6

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[½»Á÷] ¡¾ÇóÖú¡¿how to calculate system energy?

Guys, when I calculate a 2-D system energy, I just use the following options in siesta fdf file, but after running, the structure has been changed, do you know why? how can I fix it. when I set the lattice vector I make it larger in one direction(y-direction) since I want to leave some vacuum space in that direction in order to avoid the interaction. Thanks!
LatticeConstant  1.0 Ang
%block LatticeVectors
  5.3340      0.0000    0.0000
  0.0000      16.1592    0.0000
  0.0000      0.0000    15.000
%endblock LatticeVectors
%block kgrid_Monkhorst_Pack
    10   0  0     0.0
     0  10  0     0.0
     0   0  1     0.0
MD.TypeOfRun            CG
MD.NumCGsteps           100
MaxSCFIterations        200
MeshCutoff                150 Ry
ElectronicTemperature   300 K
DM.NumberPulay          5
DM.MixingWeight               0.01
SolutionMethod                Diagon
DM.Tolerance            2.d-5  
MD.MaxForceTol                0.02 eV/Ang
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lfhuang

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2Â¥2010-02-03 18:42:34
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xhsh

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3Â¥2010-02-03 20:48:40
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xli6

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Originally posted by xli6 at 2010-02-03 12:52:50:
Guys, when I calculate a 2-D system energy, I just use the following options in siesta fdf file, but after running, the structure has been changed, do you know why? how can I fix it. when I set the ...

I set this option just because I want to relax my model and at the same time get the minimum energy.
4Â¥2010-02-05 02:14:20
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xli6

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ÒýÓûØÌû:
Originally posted by lfhuang at 2010-02-03 18:42:34:
£¨1£©Èç¹ûÖ»Ëã¸öÄÜÁ¿£¬½á¹¹Ôõô»á±äÄØ£¿
£¨2£©Èç¹ûÖ»Ëã¸öÄÜÁ¿£¬ÇëÎÊÄúÉèÖòÎÊý¡°MD.MaxForceTol  0.02 eV/Ang¡±ÊÇÓÐʲôÒâÍ¼ÄØ£¿ÊDz»ÊdzÌÐòÓÐÌØÊâÖ®´¦£¿
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I set this option just because I want to relax this model and calculate the minimum energy.
5Â¥2010-02-05 02:15:20
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