<div>Dear Dr.Alexandre</div>
<div>Thanks a lot for your recommendation.But i have one more question.would you please give some references for theory of calculation of transmission coefficient by using scattering.I read your paper (Complex band structure with ultrasoft pseudopotential:fcc Ni ...) and it was so helpful for understanding the theory of calculating complex band
structure.but now i am interesting to know how we can use the complex band structure to find transmission coefficient.</div>
<div>sincerely yours <br><br> </div>
<div><span class="gmail_quote">On 1/18/07, <b class="gmail_sendername">Alexandre Smogunov</b> <<a href="mailto:smogunov@sissa.it">smogunov@sissa.it</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Dear Amin<br>What is implemented in ESPRESSO (in the PWCOND subdirectory)<br>is the calculation of the ballistic conductance in nanocontacts which
<br>is actually proportinal to the total electron transmission at the Fermi<br>energy (Landauer-Buttiker formula).<br>The system you set up is {metal lead+scatterer+metal lead} then<br>you run pw.x to calculate the self-consistent potential and use further
<br>pwcond.x to solve the scattering problem and to calculate transmission and<br>reflection coefficients.<br><br>regards, Alexander Smogunov<br><br>Quoting Amin Babazadeh <<a href="mailto:babazade@gmail.com">babazade@gmail.com
</a>>:<br><br>> dear users<br>> I will appreciate if someone tell me how i can calculate electrical<br>> conductivity in espresso?<br>> thanks a lot<br>> sincerely yours<br>><br>> --<br>> AMIN<br>
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