[Wien] optical conductivity or electronic conductivity?

[Nazma Ikram]

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. 


Date: Thu, 29 Oct 2009 10:26:29 +0530
From: shamikphy at gmail.com
To: wien at zeus.theochem.tuwien.ac.at
Subject: [Wien] optical conductivity or electronic conductivity?


Dear wien2k users,
 
         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:

     Im.epsilon=sigma/omega

where sigma=electronic conductivity
and omega=angular frequency of the EM wave (energy*2pi/h)

Now In file case.absorpup (or dn) we can find the data for optical conductivity in unit 1/(ohm.cm). But when I plot optical and electronic  conductivity separately I have found they are exactly the same. Then my question is

Q: whether we find optical or electronic conductivity in the file case.absorpup?

P.S. optical and electronic conductivity are not the same thing!...glass is electronically insulating but optically conducting (transparent) material.


 		 	   		  
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