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lgxyz

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[交流] 【求助】vasp优化有机分子开/关IDIPOL=4,能量差别很大 已有3人参与

各位,有没有遇到这种情况:vasp优化有机分子开/关IDIPOL=4,能量差别很大。比如,氢气,关IDIPOL时总能为-6.789774 eV,开IDIPOL时总能为-5.394207eV,差别这么大,原因在哪里?请多多指教!多谢各位!
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cenwanglai

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zzy870720z(金币+1): 谢谢解释 2011-04-01 08:19:46
引用回帖:
Originally posted by bingmou at 2011-03-31 21:53:52:
IDIPOL这个是什么呢?

偶极修正参数。
3楼2011-03-31 21:58:05
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bingmou

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IDIPOL这个是什么呢?
2楼2011-03-31 21:53:52
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lgxyz

铜虫 (正式写手)

引用回帖:
Originally posted by bingmou at 2011-03-31 21:53:52:
IDIPOL这个是什么呢?

mannual上的:
IDIPOL tag
If set in the INCAR file monopole/dipole and quadrupole corrections will be calculated. There are four possible settings for IDIPOL

IDIPOL = 1-4

For 1 to 3, the dipole moment will be calculated only parallel to the direction of the first, second or third lattice vector. The corrections for the total energy are calculated as the energy difference between a monopole/dipole and quadrupole in the current supercell and the same dipole placed in a super cell with the corresponding lattice vector approaching infinity. This flag should be used for slab calculations.
For IDIPOL=4 the full dipole moment in all directions will be calculated, and the corrections to the total energy are calculated as the energy difference between a monopole/dipole/quadrupole in the current supercell and the same monopole/dipole/quadrupole placed in a vacuum, use this flag for calculations for isolated molecules.
4楼2011-04-01 10:15:50
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bingmou

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引用回帖:
Originally posted by lgxyz at 2011-04-01 10:15:50:
mannual上的:
IDIPOL tag
If set in the INCAR file monopole/dipole and quadrupole corrections will be calculated. There are four possible settings for IDIPOL

IDIPOL = 1-4

For 1 to 3, th ...

竟然你知道这个东西是什么为什么不理解这个能量的变化呢?
5楼2011-04-01 16:25:32
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