Dear all,<br>i am trying various hydride functionals for my calculations, and i have noticed that the time required for the same system calculated with PBE0 and with HSE06 are comparable. this seems kind of strange to me as the original publicaltion of HSE06 (Hyde et al. J Chem Phys, 2003, 118, 8207) claims that, it should be less computationally demanding. Has any body compared the computation time required for these two functionals in QE?<br>
<br> my input for both the PBE0 and HSE06 calculations are like<br><br> &control<br>(...) <br>/<br> &system<br> ibrav= 0, nat= 32, ntyp= 1,<br> ecutwfc = 58.79798, occupations='smearing', smearing='gaussian',<br>
degauss= 0.00367487 <br> /<br> &electrons<br> /<br> &ions<br> /<br> &cell<br> /<br><br>The functional are specified via the pseudopotential. <br>The output shows "Exchange-correlation = PBE0 ( 6 4 8 4 0)" and "Exchange-correlation = HSE ( 1 412 4 0)", so QE should have taken the right functionals.<br>
<br><br>An other, rather technical question, is it possible that the current geometry in a optimization using hybrid functional is not printed in the output, when using "standard" settings? If so, what do i have to change in order to get the current geometry?<br>
<br>best wishes,<br><br>florence <br><br>TU Munich<br>