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Re: [abinit-forum] Cu and Au bulk modulus


Chronological Thread 
  • From: verstraete@pcpm.ucl.ac.be
  • To: "'forum@abinit.org'" <forum@abinit.org>
  • Subject: Re: [abinit-forum] Cu and Au bulk modulus
  • Date: Tue, 25 Feb 2003 12:30:05 +0100 (CET)

Hi,

both your ecut and your kpoints might not yet be converged: for optimal
convergence of FCC systems, you need shifts (Monkhorst Pack) like
nshiftk 4
shiftk 0.5 0.5 0.5
0.0 0.5 0.5
0.5 0.0 0.5
0.5 0.5 0.0

and even 8x8x8 might not be enough. For Au a colleague has gone to
12x12x12 and even higher. However your gold looks fairly good, depending
on what method was used in the other simulation.

For silver (a priori like Au) I needed a 50 Ha cutoff for good
results.

Ciao

Matthieu

--
===================================================================
Matthieu Verstraete mailto:verstraete@pcpm.ucl.ac.be
PCPM, Boltzmann, pl. Croix du Sud, 1 tel: 010/ 47 86 81
B-1348 Louvain-la-Neuve Belgium fax: 010/ 47 34 52





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