Hi everybody. <br><div class="gmail_quote"><div><div class="h5"><br> I tried to plot the bandstructure for carbon nanotube(5,5), however, the result looks strange. I have 20 carbon atoms in a unitcell, and I set the number of bands(nbnd=80 or 48).<br>
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nbnd=80 is out of the consideration that conduction bands+valence bands.<br><a href="http://imageshack.us/photo/my-images/51/cnt55bands80.jpg/">http://imageshack.us/photo/my-images/51/cnt55bands80.jpg/</a><br><br>
nbnd=48 is from the 20% more for metal.(here the carbon nanotube is metallic)<br><a href="http://imageshack.us/photo/my-images/202/cnt55bands48.jpg/"> http://imageshack.us/photo/my-images/202/cnt55bands48.jpg/</a><br>
<br> The third picture is after I added no_overlap=.true. in the <a href="http://bands.in" target="_blank">bands.in</a> file for nbnd =48.<br><a href="http://imageshack.us/photo/my-images/808/cnt55bands48nooverlap.jpg/">http://imageshack.us/photo/my-images/808/cnt55bands48nooverlap.jpg/</a><br>
All the three pictures are far from the band structure in literature, and I don't know if they are wrong. <br>
Can somebody give me an advice and I apprieciate it very much. <br> Thank you!<br> <br> Best regards.<br></div></div><font color="#888888"><font color="#888888"><br>Chengyu Yang<br>MMAE<br>University of Central Florida, USA<br>
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