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Dear all

After a relaxation, I want to perform a self-consistent calculation.

a. Should I use the WAVECAR produced by the relaxation calculation to save time?

b. In some paper , they set ISTART=0 and I don't understand why ?

c. In my humble opinion , went we perform a self-consistent calculation, we should not change the position of atoms and the shape or volume of the cell.
But,how we set the ISIF?

0,1,2,3and 4 well change the atom's position

5,6And 7 well change the shape or volume of the cell
So, what can I do?

please Somebody give me some advice.
thank you so much.

<span class='smallblacktext'>[ Edited ]</span>

[quote="dyc_2008"]
b. In some paper , they set ISTART=0 and I don't understand why ?
[/quote]
c. In my humble opinion , went we perform a self-consistent calculation, we should not change the position of atoms and the shape or volume of the cell.
But,how we set the ISIF?
[/quote]
You can set the number of ionic steps NSW to be 0, then VASP will not optimize your geometry.

thank you tlchan