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Question about the calculations of diffusion_coeffciency

Posted: Sun Nov 29, 2020 4:18 pm
by jun_liu
Hello,

Regarding the calculation of the diffusion coefficient of Si using the method of ab initio molecular dynamics on VASPKIT (wiki/index.php/Liquid_Si_-_Freezing), the results I calculated according to the downloaded file did not match the results on the website. What is going on here? See attachment for calculation results.

Thanks!!

Re: Question about the calculations of diffusion_coeffciency

Posted: Mon Nov 30, 2020 4:12 pm
by ferenc_karsai
Usually the most likely source of error is, if one swaps steps or forgets to set a parameter.
Please send us your protocol of your calculational steps (but first please check it carefully yourself).

Re: Question about the calculations of diffusion_coeffciency

Posted: Wed Dec 09, 2020 6:42 am
by jun_liu
Hello,

As shown in the attachment, I wrote the INCAR batch parameters into the vasp.pbs file, and at the same time made corresponding changes to the 11th line in diffusion_coefficient.py: I changed the original "temp=re.sub("XDATCAR .",,sys.argv[1])" to "temp=re.sub(r'XDATCAR.',"",sys.argv[1])"; because according to the original script, my python2 cannot run this script. The remaining parameters are basically unchanged.

Best wishes