# Plasmonic performance of AuxAgyCu1-x-y alloys from many-body perturbation theory.

@article{Orhan2019PlasmonicPO, title={Plasmonic performance of AuxAgyCu1-x-y alloys from many-body perturbation theory.}, author={Okan K. Orhan and David D. O’Regan}, journal={Journal of physics. Condensed matter : an Institute of Physics journal}, year={2019}, volume={31 31}, pages={ 315901 } }

We present a detailed appraisal of the optical and plasmonic properties of ordered alloys of the form AuxAgyCu1-x-y, as predicted by means of first-principles many-body perturbation theory augmented by a semi-empirical Drude-Lorentz model. In benchmark simulations on elemental Au, Ag, and Cu, we find that the random-phase approximation (RPA) fails to accurately describe inter-band transitions when it is built upon semi-local approximate Kohn-Sham density-functional theory band-structures. We…

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