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<BR>The word optical here means that e m radiations in the frequency range corresponding to optical spectum are incident on the semiconductor, causing transition of electrons (hence electronic) from the valence to conduction band. <BR>
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Date: Thu, 29 Oct 2009 10:26:29 +0530<BR>From: shamikphy@gmail.com<BR>To: wien@zeus.theochem.tuwien.ac.at<BR>Subject: [Wien] optical conductivity or electronic conductivity?<BR><BR>
<DIV>Dear wien2k users,</DIV>
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<DIV> By calculating dielectric tensor we can calculate electronic conductivity. I have calculated dielectric tensor and from which I have also deduced electronic conductivity sigma by following the relation:<BR><BR> Im.epsilon=sigma/omega<BR><BR>where sigma=electronic conductivity<BR>and omega=angular frequency of the EM wave (energy*2pi/h)<BR><BR>Now In file case.absorpup (or dn) we can find the data for optical conductivity in unit 1/(<A href="http://ohm.cm/">ohm.cm</A>). But when I plot optical and electronic conductivity separately I have found they are exactly the same. Then my question is<BR><BR>Q: whether we find optical or electronic conductivity in the file case.absorpup?<BR><BR>P.S. optical and electronic conductivity are not the same thing!...glass is electronically insulating but optically conducting (transparent) material.<BR></DIV><INPUT type=hidden><INPUT type=hidden>
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