<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Jul 2, 2012, at 1:24 PM, ÁÙ·çŪµÑ wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hi! All</div>
<div>I'm trying to calculate the quantum conductance of quasi one dimension structure with Wannier90 and PWscf. </div>
<div>But the one dimension band structure of suppercell is weird: bands with high energy seem very "crowded".</div>
<div>I meet this problem when calculating Al nanowire and graphene nanoribbon. It seems a computation error as</div>
<div>energy seems to be limitted in a small range.</div>
<div>I have raised the value of cutoff and distance between nanoribbons in directions perpendicular to transport,</div>
<div>but results changed little.</div>
<div>My friend plots the bands of graphene nanoribbon with fplo, which can be a reference I think.</div>
<div> </div>
<div>The input files and bands are in attachment.</div>
<div> </div>
<div>Thank you very much!</div><span><nscf.in></span><span><scf.in></span><span><bands.jpg></span><span><bands_fplo.jpg></span>_______________________________________________<br></blockquote><br></div><div>It seems that your band structure is correct. If you want to look at higher energy bands, due to the presence of </div><div>these "free-electron-like" states, you must increase nbnd.</div><div><br></div><div>The Wannier90 procedure might be useful to single out bands with a specific atomic character</div><div>(e.g. those deriving from the pz orbitals of C atoms). See, as an example, Fig. 2 of <span class="notInJournal" style="page-break-after: avoid; color: rgb(0, 0, 0); font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); "><cite style="page-break-after: avoid; ">Nano Lett.</cite>, </span><strong style="page-break-after: avoid; color: rgb(0, 0, 0); font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">2009</strong><span style="color: rgb(0, 0, 0); font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">, </span><em style="page-break-after: avoid; color: rgb(0, 0, 0); font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif; font-size: 12px; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">9</em><span style="color: rgb(0, 0, 0); font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; "> (10), pp 3425¨C3429.</span></div><div><span style="color: rgb(0, 0, 0); font-family: 'Trebuchet MS', Arial, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none; ">Giovanni</span></div><br><div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div><br class="Apple-interchange-newline"><br></div><div><br></div><div>--</div><div><div><br></div><div>**** PLEASE NOTICE THE NEW E-MAIL ADDRESS: <a href="mailto:giovanni.cantele@spin.cnr.it">giovanni.cantele@spin.cnr.it</a></div></div><div><br></div><div><div>Giovanni Cantele, PhD</div><div>CNR-SPIN</div><div>c/o Dipartimento di Scienze Fisiche</div><div>Universita' di Napoli "Federico II"</div><div>Complesso Universitario M. S. Angelo - Ed. 6</div><div>Via Cintia, I-80126, Napoli, Italy</div><div>Phone: +39 081 676910</div><div>Skype contact: giocan74</div><div><br></div><div>ResearcherID: <a href="http://www.researcherid.com/rid/A-1951-2009">http://www.researcherid.com/rid/A-1951-2009</a></div><div>Web page: <a href="http://people.na.infn.it/~cantele">http://people.na.infn.it/~cantele</a></div><div> <a href="http://www.nanomat.unina.it">http://www.nanomat.unina.it</a></div></div></span></div></span></div></span></div>
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