Hi, Paolo<br><br>Gao mentioned he/she used experimental alat. I think this may be a better approach:<br>1. relax crytal, get alat A_0 and corresponding experimental alat B_0(under zero pressure)<br>2. get experimental alat B_1 under external pressure one's interested in, calculate the ratio c=B_1/B_0
<br>3. set abinitio alat A_1 according to this ratio: A_1 = c * A_0, assuming they have same scaling behavior.<br><br>I haven't done high-pressure calculations before. So this is just a guess. Correct me if I get on the wrong way. Thanks.
<br><br>Best,<br>Jin Zhang<br><br><div><span class="gmail_quote">On 11/27/06, <b class="gmail_sendername">Paolo Giannozzi</b> <<a href="mailto:giannozz@nest.sns.it">giannozz@nest.sns.it</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>On Nov 27, 2006, at 13:23 , Guoying Gao wrote:<br><br>> I'm sorry for my ambiguous expressions. I mean that I did<br>> a single scf calculation before relaxing.<br><br>this is irrelevant: convergence of pressure wrt kinetic energy
<br>cutoff is notoriously slow<br><br>Paolo<br>---<br>Paolo Giannozzi, Democritos and University of Udine, Italy<br><br><br>_______________________________________________<br>Pw_forum mailing list<br><a href="mailto:Pw_forum@pwscf.org">
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