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浩浩好帅

金虫 (小有名气)

量子化学计算~~

[求助] VASP计算时出现这样的中断而且有时计算还不收敛请各位大神给些意见!! 已有2人参与

下面是我做结构优化的INCAR:
YSTEM = name
ENCUT = 400
PREC = Medium
EDIFF = 5E-4
EDIFFG = -0.03
GGA = PE
VOSKOWN = 1
ISPIN  = 2
ISYM = 0
LREAL = AUTO
ISTART = 0
ICHARG = 2
ISMEAR = 2
SIGMA = 0.1
IBRION = 2
ISIF = 2
NSW = 500
POTIM = 0.5
NELMIN = 4
NELM = 200
ALGO = Fast
LPLANE = TURE
LWAVE = .FALSE.
LCHARG = .FALSE.
下面是报错终止的提示:
329 F= -.46550517E+03 E0= -.46550238E+03  d E =-.284967E-03  mag=     7.0722
curvature:   0.00 expect dE= 0.000E+00 dE for cont linesearch  0.000E+00
ZBRENT: fatal internal in brackting
         system-shutdown; contact gK immediately
走了329步才停止的,有的时候要是重新提上继续计算的话还是能收敛的,但这样的报错时常发生!很困惑不知道是什么的原因?(计算体系是氧化铝和钴)
请各位大声帮帮指点一下,万分感谢~~
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人生没有走不了得路就看你敢不敢迈出第一步!!!
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不取俗名

木虫 (正式写手)

【答案】应助回帖

★
感谢参与,应助指数 +1
liliangfang: 金币+1, 谢谢交流 2016-01-30 18:04:32
329步太多了,可能是体系太大或者收敛精度太高的原因,精度和计算量从来都是杠杆关系

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2楼2016-01-16 20:40:42
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emilyoyang

木虫 (正式写手)

【答案】应助回帖

★
感谢参与,应助指数 +1
liliangfang: 金币+1, 谢谢交流 2016-01-30 18:04:38
try this following tags in INCAR:
ISMEAR = 0
SIGMA = 0.05
IBRION = 2
ISIF = 2
NSW = 500
POTIM = 0.25
NELMIN = 4
3楼2016-01-17 07:16:10
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