<div>Dear developers,</div><div><br /></div><div>I know that is not possible to perform SCF calculations using the OT scheme when extra molecular orbitals are requested.</div><div><br /></div><div>The problem is that for many not trivial systems the OT scheme is always able to reach a SCF convergence, while the standard DIAGONALIZATION algorithms ( no matter which combinations of parameters are used for the mixing ) fail, even starting from a fully converged electron density reached with the OT scheme.<br />Strict diagonalization algorithms are also required in various subroutines like KPOINT, XAS and GW for example.<br /></div><div><br /></div><div>Having the possibility to calculate added MOS using the OT scheme would be enormously beneficial in terms of applicability of the CP2K software and a considerable gain in computational resources. <br /><br />So, I was wondering if there is a specific reason why extra MO cannot be computed with the OT scheme, or more simply it has not been implemented yet.<br /><br />Thank you in advance for the help and clarifications.<br /><br />Kind regards,<br />Lorenzo Agosta<br /></div>
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