Dear Nazma,<br><br> Thank you very much for your reply. To further clarify my doubt I am asking one more question. If we get one peak in the optical (i.e. electronic) conductivity spectrum does it mean that at that frequency more photons will be absorbed giving high value of its absorbtance and also high value of electronic conductivity i.e. does it mean at that frequency the material is electronically conducting (transparent) but optically opaque?...<br>
<br>Shamik Chakrabarti<br><br><div class="gmail_quote">2009/10/30 Nazma Ikram <span dir="ltr"><<a href="mailto:nazmaikram@hotmail.com">nazmaikram@hotmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<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>
<hr>
Date: Thu, 29 Oct 2009 10:26:29 +0530<br>From: <a href="mailto:shamikphy@gmail.com" target="_blank">shamikphy@gmail.com</a><br>To: <a href="mailto:wien@zeus.theochem.tuwien.ac.at" target="_blank">wien@zeus.theochem.tuwien.ac.at</a><br>
Subject: [Wien] optical conductivity or electronic conductivity?<div><div></div><div class="h5"><br><br>
<div>Dear wien2k users,</div>
<div> </div>
<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/" target="_blank">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">
<div></div><input type="hidden"><input type="hidden">
<div></div> <br></div></div><hr>Windows 7: I wanted more reliable, now it's more reliable. <a href="http://microsoft.com/windows/windows-7/default.aspx?h=myidea?ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_myidea:102009" target="_blank">Wow!</a></div>
<br>_______________________________________________<br>
Wien mailing list<br>
<a href="mailto:Wien@zeus.theochem.tuwien.ac.at">Wien@zeus.theochem.tuwien.ac.at</a><br>
<a href="http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien" target="_blank">http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien</a><br>
<br></blockquote></div><br><input id="gwProxy" type="hidden"><input onclick="jsCall();" id="jsProxy" type="hidden"><div id="refHTML"></div>