Dear Yun-Peng.<br><br><div class="gmail_quote">Le 21 février 2012 14:46, Yunpeng Wang <span dir="ltr"><<a href="mailto:yunpengwang@live.com">yunpengwang@live.com</a>></span> a écrit :<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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PWscf authors and users:<div><br></div><div>I want to find answers to the following questions about PWCOND because I am new PWCOND user.</div><div><br></div><div>1. Does nonequilibrium Greens function employed in PWCOND? </div>
</div></div></blockquote><div><br>PWCOND does not use NEGFs it calculates directly the scattering states <br>
in real space.<br> </div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div dir="ltr"><div>Or, the effective potential in scattering region is self-consistently obtained or from <br>
</div></div></div></blockquote><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div dir="ltr"><div>the effective potential from scattering region SCF calculation? </div>
</div></div></blockquote><div><br>It should be run after PW calculations, so it uses the SCF potential of the leads and the scattering region at equilibrium. It is therefore zero bias approach, no finite voltage is implemented yet.<br>
<br>best regards, <br>Alexander<br><br> </div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div dir="ltr"><div>In my opinion, effective potential is not self-consistently obtained.</div>
<div>2. Is PWCOND applicable to finite-voltage case? In my opinion, it can not.</div><div><br></div><div>best wishes,</div><div>Yun-Peng</div> </div></div>
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