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<p>Dear WIEN2k user,</p>
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<p>I am now doing optical properties calculation for semimetals. I have a few question related to the energy shift in case.inkram file. If I don't do energy shift, I can't get a reasonable results compared to experiments. That brings me into two questions.</p>
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<div>First, what is energy shift here? How do you determine whether you need energy shift or not? </div>
<div><span style="font-size: 12pt;">Second,how do you determine the exact number of shift, is it shown in some file? </span><br>
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<p>Thanks in advance</p>
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<p>Sincerely</p>
<p>Wangwei Lan</p>
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