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arXiv · 2008.02804

Plasmonic nonreciprocity driven by band hybridization in moir\'e materials

Michał Papaj·Cyprian Lewandowski
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Abstract

We propose a new current-driven mechanism for achieving significant plasmon dispersion nonreciprocity in systems with narrow, strongly hybridized electron bands. The magnitude of the effect is controlled by the strength of electron-electron interactions $\alpha$, which leads to its particular prominence in moir\'e materials, characterized by $\alpha \gg 1$. Moreover, this phenomenon is most evident in the regime where Landau damping is quenched and plasmon lifetime is increased. The synergy of these two effects holds a great promise for novel optoelectronic applications of moir\'e materials.

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Michał Papaj, Cyprian Lewandowski. 2020-08-06. Plasmonic nonreciprocity driven by band hybridization in moir\'e materials. https://doi.org/10.1103/physrevlett.125.066801

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