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金虫 (小有名气)

[求助] 计算过渡态 已有2人参与

用vasp计算过渡态时,如果不用脚本程序,如何进行计算?插值过程是如何完成的?

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awanker

铜虫 (正式写手)

【答案】应助回帖

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感谢参与,应助指数 +1
漫天飘雪: 金币+2, 谢谢交流 2016-08-03 09:43:33
微笑述说忧伤: 金币+5, 有帮助 2016-08-06 17:42:40
我也是在网上搜到的答案:

解决方案汇总

1,ISYM=0;
Set ISYM = 0 explicitly in the INCAR file. (I had ADDGRID added as well). Helped me with VASP 4.6 and VASP 5.2.2

2,
1) 增大PREC。please have a look whether the grid for the Broyden mixing is lage enough (WARNING: grid for Broyden might be to small in OUTCAR). If so, increase PREC and check if the error persists
2) 增大K点。in case you use a tetrahedron method for BZ integration your k-mesh should be large enough to fill the (I)BZ with tetrahedra completely
  
3,降低优化选项
1) The problem disappears after reducing optimization level from -O4 to -O3.
2) The parallel version only works if I reduce optimization flag to -O1 at which point the serial version is faster anyways.
3) OFLAG=-O3 -xW 改成 OFLAG=-O1 看看 或许是优化参数的问题

4,在K点中加入Gamma点
We found that there's an error in the way VASP calculates k-points when using the Monkhorst-pack scheme and that the problem would be fixed if we used Gamma centered instead.

5,修改编译器
用ifort10就会出现这个问题,vasp论坛上说这个说的很多了。改用ifort9或者最新的ifort11都可以完美解决这个问题。
2楼2016-08-02 21:07:22
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xxxxxxxfc

金虫 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★
感谢参与,应助指数 +1
微笑述说忧伤: 金币+5, 有帮助 2016-08-06 17:44:03
3楼2016-08-03 10:31:44
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