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<div class="moz-cite-prefix">You need to consider intraband
transitions only if the Fermi level is crossing a band. <br>
If you are considering semiconducting materials, you are not in
this situation. <br>
Thus you should not include the intraband transitions, because
there is no intraband transitions, as soon as you have a band gap
separating the VB and the CB. <br>
<br>
Regards<br>
<br>
Xavier<br>
<br>
<br>
Le 6/6/2013 4:25 AM, shamik chakrabarti a écrit :<br>
</div>
<blockquote
cite="mid:CAMqRRNbarS-FjeOTruui9XtqNG3ScZoMLnmz9kNffgoOkuVpjg@mail.gmail.com"
type="cite">
<div dir="ltr">Dear Wien2k users,
<div><br>
</div>
<div> I have a basic question regarding calculation of
optical properties of a semiconducting material. My question
is:</div>
<div><br>
</div>
<div>When we should add contribution of intraband transition to
the calculation of dielectric tensor?...i.e. if there is any
thumb rule that for certain cases (non metal) we can neglect
intraband transitions or is it always necessary to add it??</div>
<div><br>
</div>
<div>Any response in this regard will be very helpful for us.</div>
<div><br>
</div>
<div>with regards,<br clear="all">
<div><br>
</div>
-- <br>
Shamik Chakrabarti<br>
Senior Research Fellow<br>
Dept. of Physics & Meteorology<br>
Material Processing & Solid State Ionics Lab<br>
IIT Kharagpur<br>
Kharagpur 721302<br>
INDIA
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