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gongjijun

木虫 (正式写手)

[交流] 【求助】castep 能量计算失败! 已有6人参与

请教各位大侠,zno 掺杂,结构优化后 计算失败,scf 到500步时出现一下信息,请大家帮我看看是什么原因,应该怎么解决:



*Warning* max. SCF cycles performed but system has not reached the groundstate.
  
Current total energy, E     =  -32978.88212556     eV
Current free energy (E-TS)  =  -32978.89935616     eV
(energies not corrected for finite basis set)

NB est. 0K energy (E-0.5TS)      =  -32978.89074086     eV

  ****************************************************************************
  Warning: electronic minimisation did not converge when finding ground state.
  ****************************************************************************
  Writing checkpoint file...

Writing model to zno_opt_3.check
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
Error check_elec_ground_state : electronic_minimisation of initial cell failed.
Current trace stack:
check_elec_ground_state
castep
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 5 pid 18637 on host localhost.localdomain to cpu 5
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 7 pid 18639 on host localhost.localdomain to cpu 7
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 2 pid 18634 on host localhost.localdomain to cpu 2
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 1 pid 18633 on host localhost.localdomain to cpu 1
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 4 pid 18636 on host localhost.localdomain to cpu 4
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 0 pid 18632 on host localhost.localdomain to cpu 0
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 3 pid 18635 on host localhost.localdomain to cpu 3
MPI_CPU_AFFINITY set to RANK, setting affinity of rank 6 pid 18638 on host localhost.localdomain to cpu 6
MPI Application rank 0 exited before MPI_Finalize() with status 1
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awmc2008

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学习者

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gongjijun(金币+1):谢谢参与
gongjijun(金币+2):好的,回头试试。 2010-05-20 21:49:01
zzy870720z(金币+1):xiexie 2010-05-20 22:17:47
泛函用LDA,截断能放大到600eV,收敛精度降低,用All band...,选上自旋,试试。迭代200次足矣。
xuexizhe
9楼2010-05-20 21:34:13
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gongjijun

木虫 (正式写手)

哪位朋友帮帮我呀!
2楼2010-05-20 13:54:01
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aylayl08

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gongjijun(金币+5):谢谢回复!估计很有可能是第二点。现在不知道该怎么办? 2010-05-20 16:42:32
gongjijun(金币+10):谢谢,您能帮我看看这两个图代表什么意义吗? 2010-05-20 17:01:51
zzy870720z(金币+2):谢谢指点 2010-05-20 17:17:24
SCF弄到500步?多大体系?用什么机器算的?
可能
1.MPI错误应该怀疑内存不足
2.掺杂体系模型太大或是不够合理
3.网关通信出了问题。

建议先用小体系试试有没有问题。
珍惜拥有,快乐人生!欢迎光临计算模拟区(*^__^*)。。。。。。。。。。。。。。
3楼2010-05-20 16:02:10
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gongjijun

木虫 (正式写手)

引用回帖:
Originally posted by aylayl08 at 2010-05-20 16:02:10:
SCF弄到500步?多大体系?用什么机器算的?
可能
1.MPI错误应该怀疑内存不足
2.掺杂体系模型太大或是不够合理
3.网关通信出了问题。

建议先用小体系试试有没有问题。

机器8核16g服务器,mpi应该正确,网关似乎也没有问题。
zno 222 超净胞,掺杂fe,cu,n各一个原子,因是先试试,所以没有考虑具体的替位位置,随机置换的,所以可能是结构不合理引起的了。
有一个疑问:结构不合理的时候能否算出能量,态密度?

还有,您能不能讲讲这两个图是什么意义?我是新手,不懂啊!

[ Last edited by gongjijun on 2010-5-20 at 16:53 ]
4楼2010-05-20 16:51:40
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