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<font size="2">Dear users and developers:</font>
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<div><font size="2">I'm studying SnSe doped with Cu, first I do the vc-relax for SnSe of unitcell. </font></div>
<div><font size="2">After relaxation, I built a 1*2*2 supercell (32 atoms),</font></div>
<div><font size="2">then I changed one Sn atom into Cu and do the vc-relax again,</font></div>
<div><font size="2">My question is should I do the vc-relax again after doping? </font></div>
<div><font size="2">The program have been working for 3 days but it seems that it won't be done... </font></div>
<div><font size="2">Thank you in advance !</font></div>
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<div><font size="2">Regards</font></div>
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<br />Yao-Hong Huang
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<br />Graduate student
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<div><font size="2">Department of Mechanical Engineering</font></div>
<div><font size="2">National Cheng Kung University</font></div>
<div><font size="2">Tainan, Taiwan</font></div>
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