<div dir="auto">It is possible that a localized basis set code misses a state, especially in the conduction bands, if the choice of the basis set is not ideal. However it is also possible that you made an honest mistake in on of the calculations. <div dir="auto"><br></div><div dir="auto">Kind regards <br><br><div data-smartmail="gmail_signature" dir="auto">-- <br>Lorenzo Paulatto<br>Written on a virtual keyboard with real fingers</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Jan 24, 2018 17:10, "Zara Nosh" <<a href="mailto:z.nrbsh@gmail.com">z.nrbsh@gmail.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-size:large;color:rgb(32,18,77)">Dear experts,</div><div class="gmail_quote"><div dir="ltr"><div style="font-size:large;color:#20124d">I have calculated the bandstructure of a 2d periodic system using PWscf and siesta. the overall pictures of bandstructure are same however there are some differences between them.</div><div style="font-size:large;color:#20124d"><br></div><div style="font-size:large;color:#20124d">The bandstructure calculated by vasp ( with planwave basis) is also similar to PWscf bandstructure. And it shows that the difference is due to the atomic like basis set of siesta.</div><div style="font-size:large;color:#20124d"><br></div><div style="font-size:large;color:#20124d">Now my question is that which bandstructures are more reliable? I guess that as the structure is periodic the planewave should give a better simulation; is it right?</div><div style="font-size:large;color:#20124d"><br></div><div style="font-size:large;color:#20124d">Best regards,</div><div style="font-size:large;color:#20124d">Zahra</div><div style="font-size:large;color:#20124d"> </div></div>
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