<div>Dear CP2K experts,</div><div><br /></div><div>I started a single-point energy calculation with the PBE0 functional using the TC-LRC and ADMM techniques. I have set</div><div> CUTOFF_RADIUS 5.8</div><div>in both PBE_HOLE_T_C_LR and INTERACTION_POTENTIAL sections. My cell is specified by</div><div><br /></div><div> &CELL<br /> A 11.8510781995796848 0.0000000000000000 0.0000000000000000<br /> B 3.0393557951773005 15.1183691669733679 0.0000000000000000<br /> C -9.9987074440890415 4.4935205367592285 12.8517421729587179<br /> PERIODIC XYZ<br /> &END CELL</div><div>which is understood in angstroms. The above cutoff is also in angstroms. So, the shortest cell size is about 11.85 angstroms. Despite of that, cp2k prints the warning message:</div><div><br /></div><div> *** WARNING in hfx_types.F:1968 :: Periodic Hartree Fock calculation ***<br /> *** requested with use of a truncated or shortrange potential. The cutoff ***<br /> *** radius is larger than half the minimal cell dimension. This may lead ***<br /> *** to unphysical total energies. Reduce the cutoff radius in order to ***<br /> *** avoid possible problems. ***</div><div><br /></div><div>Otherwise the calculation seems to run smoothly and Etot is a similar quantity to the one from the PBE calculation at the same geometry. The code version is 9.1. Should I really worry about the warning? Are the TC-LRC and ADMM techniques fully implemented for non-orthogonal cells?<br /></div><div><br /></div><div>Thank you very much for your advices.</div><div><br /></div><div>Best regards</div><div>Martin Konôpka.<br /></div>
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