<div>Dear Gana,</div>
<div>you can set number of bands for calculation with </div>
<div>keyword 'nbnd'. In pwscf, for a semiconductor or insulator, it default sets nbnd=nelec/2.</div>
<div> </div>
<div>more detail information you can find in the file $espresso/Doc/INPUT_PW.</div>
<div> </div>
<div>regards,</div>
<div> </div>
<div>hai-ping<br><br> </div>
<div><span class="gmail_quote">On 10/31/06, <b class="gmail_sendername">Gana Natarajan</b> <<a href="mailto:gn203@hermes.cam.ac.uk">gn203@hermes.cam.ac.uk</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br>Hi,<br><br>I would like to include some unoccupied states in the conduction band of a<br>semiconductor so that I can obtain the electronic density of states in the
<br>conduction band and also estimate the band gap.<br>How can I do this?<br><br><br>Thanks,<br>Gana<br><br>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^<br>Gana Natarajan<br>PhD student<br>
Department of Chemistry<br>Lensfield Road<br>Cambridge CB2 1EW<br>United Kingdom<br>Tel: +44 -(01223) 336 532<br>Fax: +44- (01223) 336 362<br>Gana<br><br><br><br><br><br><br><br><br><br>_______________________________________________
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