Hi Mousumi,
your zone-center acoustic frequency is not close enough to zero;
this is an indication of bad, or badly converged, forces.
(However you already get right sign and order of magnitude,
that's not always automatically the case :-)
Some considerations:
1. Your basis (SZ) is probably too
Hi everybody,
I am trying to relax then calculate the phonon frequencies of
different carbon systems using siesta fcbuild vibra.
For diamond structure- at Gamma point:
my results- phonon freq= 0.3, 2042 cm-1. (only Gamma point calculation)
phonon freq= 0.50, 2163
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