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dfy50

新虫 (小有名气)

[求助] 各位大牛们进来帮帮小弟MS 收敛

MS-castep- GeomOpt   设置scf tolerence 2.0e-6,max scf 300  结果如下:
  297  -1.88892255E+004  4.90628494E+000   5.74820448E-006   69574.14  <-- SCF
    298  -1.88892256E+004  4.90628472E+000   5.78251894E-006   69713.28  <-- SCF
    299  -1.88892257E+004  4.90628502E+000   5.72796669E-006   69852.44  <-- SCF
    300  -1.88892259E+004  4.90628116E+000   5.65491769E-006   69990.55  <-- SCF
------------------------------------------------------------------------ <-- SCF
*Warning* max. SCF cycles performed but system has not reached the groundstate.
  
Current total energy, E     =  -18889.17422662     eV
Current free energy (E-TS)  =  -18889.22587345     eV
(energies not corrected for finite basis set)

NB est. 0K energy (E-0.5TS)      =  -18889.20005003     eV

  ****************************************************************************
  Warning: electronic minimisation did not converge when finding ground state.
  ****************************************************************************
  Writing checkpoint file...

Writing model to TiO2_rutile.check
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep

我把max scf 加到500,结果如下:  498  -1.88892400E+004  4.90606496E+000   1.13362865E-006   94744.62  <-- SCF
    499  -1.88892401E+004  4.90607876E+000   1.16710501E-006   94862.27  <-- SCF
    500  -1.88892401E+004  4.90607767E+000   1.16612280E-006   94979.50  <-- SCF
------------------------------------------------------------------------ <-- SCF
*Warning* max. SCF cycles performed but system has not reached the groundstate.
  
Current total energy, E     =  -18889.18842739     eV
Current free energy (E-TS)  =  -18889.24008885     eV
(energies not corrected for finite basis set)

NB est. 0K energy (E-0.5TS)      =  -18889.21425812     eV

  ****************************************************************************
  Warning: electronic minimisation did not converge when finding ground state.
  ****************************************************************************
  Writing checkpoint file...

Writing model to 500.check
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep


是嘛原因啊,期待高手的解决啊

[ Last edited by dfy50 on 2011-12-8 at 09:12 ]
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dfy50

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有木有人帮忙啊
2楼2011-12-08 09:13:01
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pengliusss

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同求????
3楼2012-11-29 10:14:02
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zt_chem

木虫 (正式写手)

【答案】应助回帖

是不是模型没有构建好?
4楼2013-05-20 21:12:54
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