DEar Riubin, a supercell is just when you replicate along x,y and z a primitive cell. The cell paramenters are such just (in the orthorombic case): number_of_replicas_along_x * a, number_of_replicas_along_y*b, number_of_replicas_alog_z * c, where a, b, and c are the primitive cell parameters. For better understanding all this you should read an introduction to crystallography and solid state physics.<br>
<br>As we are in periodic boundary conditions the supercell is interacting with its images of course as in a primitive cell calculation. define better your question. (after reading a text book of crystallography and of solid state).<br>
<br>cheers<br><br>Layla<br><br> <br><br><div class="gmail_quote">2012/9/7 Ruibin Liu <span dir="ltr"><<a href="mailto:rainbee1988@gmail.com" target="_blank">rainbee1988@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi everyone,<div><br></div><div>When we want to use a supercell, how to determine the cell parameters? What kind of reactions are considered between supercells?</div><div><br></div><div>Thanks,</div><div>Ruibin</div><div>
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