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OEPLevel

Section Hamiltonian::XC
Type integer
Default oep_kli

At what level shall Octopus handle the optimized effective potential (OEP) equation.

Options:

oep_none:
Do not solve OEP equation.
oep_kli:
Krieger-Li-Iafrate (KLI) approximation. For spinors, the iterative solution is controlled by the variables in section Linear Response::Solver, and the default for LRMaximumIter is set to 50. Ref: JB Krieger, Y Li, GJ Iafrate, Phys. Lett. A 146, 256 (1990).
oep_full:
(Experimental) Full solution of OEP equation using the Sternheimer approach. The linear solver will be controlled by the variables in section Linear Response::Solver, and the iterations for OEP by Linear Response::SCF in LR calculations and variable OEPMixing. Note that default for LRMaximumIter is set to 10. Ref: S. Kuemmel and J. Perdew, Phys. Rev. Lett. 90, 043004 (2003).

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