Dear Cp2k experts,<div><br></div><div>I have a question around DFT-D3 VDW correction in cp2k. How do we set the parameter <b><a href="https://manual.cp2k.org/trunk/CP2K_INPUT/ATOM/METHOD/XC/VDW_POTENTIAL/PAIR_POTENTIAL.html#R_CUTOFF">R_CUTOFF</a></b>? </div><div><br></div><div>I started with 7.5 angstroms (half of my cell size), but I observed energies change by 5 Kj/mol when I increase the cutoff to 10 angstroms. Can someone explain me please how to choose this parameter properly to get reliable results?</div><div><br></div><div>Please find attached my input and topology file.</div><div><br></div><div>Thanks,</div><div>Alex</div>
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