Need help in chalcopyrite structure

Total energy, geometry optimization, DFT+U, spin....

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nassimus
Posts: 1
Joined: Tue Feb 15, 2011 7:40 pm

Need help in chalcopyrite structure

Post by nassimus » Fri Mar 04, 2011 1:05 pm

Hello everyone, I'm new user of Abinit, i'm working on a chalcopyrite semiconductor I-III-VI2 (CuInS2,CuAlS2, and CuGaS2)
when i introduce the atomic positions ( xred) and space groupe (122), some cartesian forces in the output file have a big value (order 10e-2) which mean that the structure is not relaxed
the xred are
xred 0 0 0
0 0.5 0.25
0.5 0.5 0
0.5 0 0.25
0.25 0.25 0.125
0.75 0.75 0.125
0.75 0.25 0.375
0.25 0.75 0.375
i think ther's a problem with this xred, If anyone can help me,
Thank you
Cordially; M.Nassim :D

mverstra
Posts: 655
Joined: Wed Aug 19, 2009 12:01 pm

Re: Need help in chalcopyrite structure

Post by mverstra » Fri Mar 04, 2011 2:26 pm

need full input and more information. Please follow the forum nettiquette viewtopic.php?f=20&t=251
Matthieu Verstraete
University of Liege, Belgium

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