“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 18251 |
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The question of whether or not passive sub-wavelength cavities can
alter the properties of quantum materials is currently attracting a
great deal of attention. In this Article we show that the Fermi liquid
parameters of a two-dimensional metal are modified by cavity polariton modes, and that these changes can be monitored by measuring a
paradigmatic magneto-transport phenomenon, Shubnikov-de Haas
oscillations in a weak perpendicular magnetic field. This effect is
intrinsic, and totally unrelated to disorder. As an illustrative example, we carry out explicit calculations of the quasiparticle velocity of
graphene in a planar van der Waals cavity formed by natural hyperbolic crystals and metal gates. The largest effects of the cavity occur
when the phonon polariton modes of the former match energetically
the graphene plasmon. For typical graphene carrier densities this
occurs in the Terahertz spectral range.
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