<div>Hello,</div><div>i managed to install gromacs/cp2k and was able to simulate some systems, im still quite new to it and i had a few question about some parameters you can chose in input file. <br></div><div><br></div><div>I simulated a system with Zn2+ with an histidine and in the &OT section i had only MINIMIZER, STEPSIZE and PRECONDITIONNER FULL_ALL.</div><div>(in gromacs cp2k the input file is generated automaticly with the mdp file but you can modify the cp2k.inp file and provided any inp file you want)</div><div><br></div><div>Then i wanted to simulate the exact same system but with Cu2+ instead of Zn2+, this time in the &OT section i had UKS that appeared,
i looked in manual and UKS is using alpha and beta orbitals for spin
polarized calculations and ROKS is using a restricted Kohn-sham
calculation.</div><div><br></div><div>I got advised to put ROKS instead of UKS, is this because Cu2+ has an unpaired electron in orbital d
(3d9) so we need to change multiplicity to 2 and restrict the DFT
calculation ? (compared to Zn2+ who has no unpaired electron so multiplicity is set to 1)</div><div><br></div><div>Is there a more detailed version of the online manual that i missed or a book that could explain the parameters ?<br></div><div><br></div><div><br></div><div>Best regards,</div><div><br></div><div>Mario<br></div><div><br></div>
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