<span><font color="#888888"><font color="#000099">Dear Pankaj.<br>It is not a problem, you can have vacuum in the XY plane, it is<br>the case of infinite monatomic wires with some adatom, for example.<br>The important point is to have long enough scattering region, with<br>
many "lead" atoms on the right and on the left to match from both<br>sides to the bulk-like potential of the leads.<br>You can see some our examples.<br>HTH,<br>Alexander<br><br><br><br>As electrodes you can h<br>
</font></font></span><br><div class="gmail_quote">Le 18 avril 2012 19:10, pankaj sahota <span dir="ltr"><<a href="mailto:pankajsahota@gmail.com" target="_blank">pankajsahota@gmail.com</a>></span> a écrit :<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<font color="#330099">Hi, </font><div><font color="#330099"><br></font></div><div><font color="#330099">Is it possible that an electrode can contain vacuum on x and y directions, The size of electrode to be used remain as the size of layers of electrode attached to the lead. Because from the reference (</font><span style="font-family:'Times New Roman';font-size:medium">A. Smogunov, A. Dal Corso, E. Tosatti, Phys. Rev. B 70, 045417 (2004))</span><span style="color:rgb(51,0,153)"> given for the PWCOND, it is looking like that. But according to the book by Supriyo Datta, the electrode size should be large.</span></div>
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<div><div><br></div>-- <br><font color="#000099">Pankaj Kumar<br>DST Project Fellow(Ph.D.)<br>Department of Physics<br>The LNM IIT Jaipur<br>Mob. No. <a href="tel:%2B91%209736694726" value="+919736694726" target="_blank">+91 9736694726</a></font><br>
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