How to run MD with Duterium

[ark245]

Hi vasp-users,
We are trying to run molecular dynamics with deuterium instead of 1H. We do this by changing the POMASS in the POTCAR. We find that our MD runs with POMASS=2 run a lot slower than the ones with the normal H POTCAR. Our diff shows only that only the POMASS is different between the two runs. We do not supply POMASS tags in the INCAR.
Are we missing something?
For example - It takes 7 sec cpu time for H and 1600s for D. The attachment is a vimdiff for a similar example.

Thanks!

Ps. Are there more details about how to run calculations for different isotopes online? We did not find anything.

[alexey.tal]

Hi,

Please provide all the files according to the forum guildelines.