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【求助】vasp優(yōu)化有機(jī)分子開/關(guān)IDIPOL=4,能量差別很大 已有3人參與
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| 各位,有沒有遇到這種情況:vasp優(yōu)化有機(jī)分子開/關(guān)IDIPOL=4,能量差別很大。比如,氫氣,關(guān)IDIPOL時(shí)總能為-6.789774 eV,開IDIPOL時(shí)總能為-5.394207eV,差別這么大,原因在哪里?請(qǐng)多多指教!多謝各位! |
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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. |
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