Generalization of ARH Hessian formalism to RO-SCF in DFT unifies implementations and shows superior convergence on iron-sulfur clusters and avoidance of higher-energy minima in two-determinant calculations.
Eric and Burant, John C
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Augmented Roothaan-Hall Hessian Applied to Spin-Restricted Open-Shell Density-Functional Theory
Generalization of ARH Hessian formalism to RO-SCF in DFT unifies implementations and shows superior convergence on iron-sulfur clusters and avoidance of higher-energy minima in two-determinant calculations.