vasp使用CLNEB计算过渡态出现问题
我在使用VASP中的CLNEB计算水分子和臭氧分子共同吸附在表面上的过渡态时,发现CNEB计算收敛,但能量最高点的切向力不接近0,想请教一下是什么问题导致的?
在下面贴出我的INCAR
Global Parameters
2 ISTART = 0 (Read existing wavefunction; if there)
3 LREAL = Auto (Projection operators: automatic)
4 ENCUT = 800 (Cut-off energy for plane wave basis set, in eV)
5 PREC = Normal (Precision level)
6 Electronic Relaxation
7 ISMEAR = -5 (Gaussian smearing; metals:1)
8 NELM = 60 (Max electronic SCF steps)
9 NELMIN = 6 (Min electronic SCF steps)
10 EDIFF = 1E-07 (SCF energy convergence; in eV)
11 Ionic Relaxation
12 NSW = 500 (Max ionic steps)
13 ISPIN = 2
14 ISIF = 2 (Stress/relaxation: 2-Ions, 3-Shape/Ions/V, 4-Shape/Ions)
15 EDIFFG = -0.05 (Ionic convergence; eV/AA)
16 NCORE = 4
17 ALGO = Fast
18 LDIPOL = T
19 IDIPOL = 3
20 IVDW = 11
21
IMAGES = 2
IOPT = 7
SPRING = -5.0
ICHAIN = 0
LCLIMB = T
IBRION= 3
POTIM= 0
以及我的能量和力的参数
0 0.000000 -509.312400 0.000000
1 0.049668 -509.278100 0.034300
2 0.048540 -507.575600 1.736800
3 0.000000 -509.422100 -0.109700
谢谢!!
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中间多插几个点看看
同意楼上,一个方法是可以多插几个点,一个方法是可以先不开CLNEB,先算一段时间看力收敛到一定趋势再开CLNEB,
高