[Pw_forum] how to relax the atoms position without changing the cell parameters
Mansoureh Pashangpour
mansourehp at gmail.com
Thu Jul 10 07:18:33 CEST 2008
Dear Yang
you can do relaxation with calculation = "relax", and
&electrons
conv_thr = 1.d-6,
startingwfc = 'atomic',
mixing_beta = 0.3,
diagonalization = 'david_overlap',
/
&ions
ion_dynamics = 'damp',
pot_extrapolation = "second_order",
wfc_extrapolation = "second_order",
and also you can fix positions with '0' after any ATOMIC_POSITIONS
bye Mansoureh
On Wed, Jul 9, 2008 at 7:22 PM, 孙阳 <sunyang198498 at gmail.com> wrote:
> Hi!
> how could I relax the atoms position without changing the cell parameters
> say, if i have a simple cubic cell with each point having a benzene
> structure. How could I relax the benzene's atoms, say, hydrogen and
> carbon with the fixed edge size within the simple cubic cell.
>
> Thank you,
>
> Yang
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