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<div class="moz-cite-prefix">Hello Sandeep,<br>
<br>
A negative value of U for instance occurs in Ge. <br>
<br>
I was given this article before to explain this behavior:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.sbfisica.org.br/bjp/files/v36_286.pdf">http://www.sbfisica.org.br/bjp/files/v36_286.pdf</a><br>
<br>
Note that the effective U = U-J. <br>
<br>
<br>
Best regards,<br>
<br>
Michael Sluydts<br>
<br>
sandeep schreef op 8/07/2015 om 18:49:<br>
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<div>Dear users! </div>
<div>It may not be appropriate to post this question here,</div>
"Did any one encounter negative value of U in solids (compounds)
? if so explain its origin and quote related concepts. Kindly
explain the origin and experimental supports if any?"<br>
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<pre class="moz-signature" cols="72">--
ir. Michael Sluydts
Center for Molecular Modeling
Ghent University
Technologiepark 903
9052 Zwijnaarde, Belgium
tel. +32 (0)9 264 66 19
<a class="moz-txt-link-freetext" href="https://molmod.ugent.be">https://molmod.ugent.be</a></pre>
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