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yesYoona

新虫 (小有名气)

[求助] 对正交晶格掺杂后计算不收敛

工作站CPU36核(计算的时候100%利用),内存70G(全是C盘,计算的时候70%利用),本征晶格是α-CoSn3(8个Co,16个Sn),没有扩胞,直接make p1后用Cu取代Co,相同位置的Co都被取代了,然后计算energy报错如下,尝试修改smearing到0.5后计算energy成功,默认值是0.1,因为不知道smearing的设置原则是什么,本着靠近默认值的想法,依次修改成0.3、0.2计算energy都成功了,然后继续用0.2去优化晶胞,算了12个小时还没算完(现在还在算),我想问问smearing这样修改成0.2做计算这样有问题没有,会不会造成大的误差,接下来我还要算elastic constants,是否可行。请各位懂的老师帮帮我,非常感谢!

=============================================================================================
*Warning* max. SCF cycles performed but system has not reached the groundstate.
  
Current total energy, E     =  -11071.87085477     eV
Current free energy (E-TS)  =  -11071.99402823     eV
(energies not corrected for finite basis set)

NB est. 0K energy (E-0.5TS)      =  -11071.93244150     eV

  ********************************************************
  Warning: electronic minimisation did not converge during
           finite basis set correction.
  ********************************************************
Checkpoint file cannot be written.
Error calculate_finite_basis : Convergence failed when doing finite basis set correction.
Current trace stack:
calculate_finite_basis_corr
check_elec_ground_state
castep
application called MPI_Abort(MPI_COMM_WORLD, 1) - process 31
application called MPI_Abort(MPI_COMM_WORLD, 1) - process 28
application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0
=============================================================================================
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yesYoona

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引用回帖:
2楼: Originally posted by echo1994 at 2020-04-25 13:31:41
会造成误差

请问我应该怎样调整设置才能收敛呢?

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3楼2020-04-25 15:09:50
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echo1994

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2楼2020-04-25 13:31:41
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echo1994

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4楼2020-04-25 15:26:59
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yesYoona

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引用回帖:
4楼: Originally posted by echo1994 at 2020-04-25 15:26:59
空带数增加,diis增加,截断能增加,k点减少,mix charge spin减少,实在不行远all EPT好像叫这个。
...

我试着增加了empty到25%,确实能做出来,不过花费的时间有点长,我再试试其他的,先谢谢了~

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5楼2020-05-12 17:50:45
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