<div dir="ltr">Hi<div><br></div><div>You're right. Apparently, my understanding was wrong and I mixed things up when I was referring to the BSSE vs plane-wave basis sets; BSSE is absent in plane wave codes.</div><div><br></div><div>The GPW method in CP2K uses mixed Gaussian/plane-wave basis sets as you said, so there is always BSSE in the part of the calculation which is done using localised Gaussian basis sets.</div><div><br></div><div>SL</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 8 February 2017 at 13:26, David T <span dir="ltr"><<a href="mailto:amazing...@gmail.com" target="_blank">amazing...@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi<br><br>thanks for answering. <br><br>Concerning about plane-wave I guess you are referring to the problem of pulay stress. It is a completely different problem. <br>1st of all, as you written it can appear on cases of volume optimisation, 2ndly it should not! appear if your cut-off was well converged and if you are optimising a ridiculous unit-cell or using bad functional like PW91 or neglecting vdW corrections in systems where it is required etc.. if it does something was not good in your starting choice of functional, cut-off, cell parameters etc..<br><h1 id="m_4489391060569807569firstHeading" class="m_4489391060569807569firstHeading" lang="en"><br></h1><p>That said and coming back to the BSSE thanks for answering.</p><p>So basically it is the same of normal LCAO code. <br></p><p>I simply didn't know CP2K use local basis-set but I thought it was combining local GTO with plane-waves. So I will now study a bit better what the plane-wave are supposed to be/do.</p><p><br></p><p>Best</p><p>Davide<br></p><br></div><div class="HOEnZb"><div class="h5">
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