<div dir="ltr">Dear Mohamed,<br><br>as you guessed, if you want to keep the cell vectors fix, then you have to choose the RUN_TYPE GEO_OPT instead of CELL_OPT. In this case only the atomic positions are relaxed.<br><br>There is the option to smear the MO occupations in general using<br><a href="http://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/DFT/SCF/SMEAR.html">http://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/DFT/SCF/SMEAR.html</a><br>which does not specifically affect the smearing of the Zn 3d orbitals.<br>Alternatively, you may use<br><a href="http://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/SUBSYS/KIND/DFT_PLUS_U/ENFORCE_OCCUPATION.html#desc_SMEAR">http://manual.cp2k.org/trunk/CP2K_INPUT/FORCE_EVAL/SUBSYS/KIND/DFT_PLUS_U/ENFORCE_OCCUPATION.html#desc_SMEAR</a><br>which will specifically perform a smearing within the orbitals of the actual atomic kind affected by the DFT+U method.<br><br>Matthias<br><br><br><br>Matthias<br><br>On Wednesday, 25 June 2014 14:09:22 UTC+2, mohamed khuili wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><div dir="ltr"><br><span lang="en"><span title="Merci Monsieur Crack
">Thank you Mr. Krack<br></span><span title="j'ai commencé par l'optimisation de la cellule, on utilisant "CELL_OPT" et une supercelle de 3X3X3, j'ai obtenu des bonnes résultats vecteur (a) et (b) et (c) "alpha" "beta" et "">I
began by optimizing the cell, using "CELL_OPT" and supercelle of 3X3X3,
I got good results vector (a) and (b) and (c) "alpha" "beta" and " </span><span title="gamma", mais j'obtient un gap de 0.57ev plus petit que ceux de l'éxpérimental qui 3.4 ev.">gamma ", but I get a gap 0.57ev smaller than that of the experimental 3.4 ev. </span><span title="et dans la littérarure c'est normal par ce que la DFT underestimates the binding energy of the Zn-d semi-core states and sowe have applied the DFT+U, j'ai refait le même calcul, j'ai utilisé en "RUN_TYPE">and
the littérarure this is normal that the DFT underestimates the binding
energy of the Zn-d semi-core states and Applied sowe-have the DFT + U, I
redid the same calculation, I used "RUN_TYPE </span><span title="CELL_OPT", j'ai obtenu un gap proche de l'expérimentale, mais j'ai perdu mes paramètre optimisés abc alpha beta et gamma:
">CELL_OPT "I got close to the experimental gap, but I lost my optimized abc alpha beta and gamma parameter:<br></span><span title="a=3.259 est devenu 3.0
">a = 3.259 became 3.0<br></span><span title="b=3.259 est devenu 3.0
">b = 3259 became 3.0<br></span><span title="c=5.22 est devenu 4.9
">c = 5.22 became 4.9<br></span><span title="la question c'est:
">the question is:<br></span><span title="- comment je peux appliquer la DFT+U sans perdre les vleurs de mes vecteurs que j'ai obtenu on DFT?
">- How can I apply DFT + U without losing vleurs my vectors I got on DFT?<br></span><span title="- est ce que je doit utiliser "RUN_TYP GEO_OPT" au lieu de "RUN_TYPE CELL_OPT"
">- Is what I should use "RUN_TYP GEO_OPT" instead of "RUN_TYPE CELL_OPT"<br></span><span title="j'ai rencontré Monsieur David Benoit de l'université de HULL, à RABAT au maroc dans le projet "CAPZEO", et si j'ai bien compris ce qu'il m'a dit, il m'a proposé d'essayer avec">I
met Mr. David Benoit University of HULL, in Rabat in Morocco in the
project "CAPZEO" and if I understood what he told me, he suggested I try
with </span><span title="la section "SMEAR OT" pour délocaliser les électrons de l'orbitals 3d de Zinc, mais j'ai pas arrivé de le faire
">the "</span></span><span lang="en"><span title="la section "SMEAR OT" pour délocaliser les électrons de l'orbitals 3d de Zinc, mais j'ai pas arrivé de le faire
"><i> smearing of the MO occupation</i>" section to relocate(delocalised) the electron orbitals of the 3d of Zinc, but I did not come to do<br></span><span title="je vous demande Monsieur Mathias de m'aider à résoudre ce problème
">I ask you, Mr Matthias to help me solve this problem<br></span><span title="Merci">Thank you</span></span><br></div></blockquote></div>