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Interband plasmon polaritons in magnetized charge-neutral graphene
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Interband plasmon polaritons in magnetized charge-neutral graphene
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Journal Article
Interband plasmon polaritons in magnetized charge-neutral graphene
2021
Overview
Studying the collective excitations in charge neutral graphene (CNG) has recently attracted a great interest because of unusual mechanisms of the charge carrier dynamics. The latter can play a crucial role for formation of recently observed in twisted bilayer CNG graphene plasmon polaritons (GPPs) associated with the interband transitions between the flat electronic bands. Besides, GPPs in CNG can be a tool providing insights into various quantum phenomena in CNG via optical experiments. However, the properties of interband GPPs in CNG are not known, even in the simplest configurations. Here, we show that magnetically-biased single-layer CNG can support interband GPPs of both transverse magnetic and transverse electric polarizations (particularly, at zero temperature). GPPs exist inside the absorption bands originating from the electronic transitions between Landau levels and are tunable by the magnetic field. We place our study into the context of potential near-field and far-field optical experiments.
The experimental observation of plasmon-polaritons in charge-neutral bilayer graphene sparked interest for plasmonic and superconducting devices. Here, simulations predict that plasmon-polaritons possessing either transverse magnetic or electric polarization arise under an applied magnetic field in charge-neutral monolayer graphene.
