Charge-transfer in time-dependent density-functional theory via spin-symmetry-breaking

Details Charge-transfer in time-dependent density-functional theory via spin-symmetry-breaking Charge-transfer in time-dependent density-functional theory via spin-symmetry-breaking

2011-01-07

arxiv.org/abs/1101.1378v1

Physics

Chemical Physics

5 pages, 4 figures

Scientific paper

Long-range charge-transfer excitations pose a major challenge for time-dependent density functional approximations. We show that spin-symmetry-breaking offers a simple solution for molecules composed of open-shell fragments, yielding accurate excitations at large separations when the acceptor effectively contains one active electron. Unrestricted exact-exchange and self-interaction-corrected functionals are performed on one-dimensional models and the real LiH molecule within the pseudopotential approximation to demonstrate our results.

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