Relaxation of a Frenkel defect fails

Problems running VASP: crashes, internal errors, "wrong" results.


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akretschmer
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Relaxation of a Frenkel defect fails

#1 Post by akretschmer » Tue Jan 28, 2025 2:01 pm

I am trying to relax a Frenkel defect (self-interstitial) of Cr. After the second ionic step some error occured and the output file tells me to submit a bug report.

Due to the nature of the defect some interatomic distances are a bit short, but the shortest distance is 1.43 A, which should be OK to relax. It has worked for other elements.

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alexey.tal
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Re: Relaxation of a Frenkel defect fails

#2 Post by alexey.tal » Tue Jan 28, 2025 3:43 pm

Dear akretschmer,

Thank you for your question.
In your INCAR I see that you didn't specify POTIM and it looks to me that the default value of 0.5 fs is too large in your case. So I would recommend you trying a smaller POTIM, for example 0.05. This should prevent the situation where your structure ends up in an unstable configuration.

Best wishes,
Alexey


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