Abstract
We study the Casimir frictions between graphene-covered hexagonal boron nitride (hBN) as well as between graphene-covered porous silicon carbide (SiC). Casimir friction between graphene-covered hBN bulks is strongly enhanced due to the hybridisation of graphene plasmons and hyperbolic phonon polaritons (HPPs) excited by hBN in comparison with that between the graphene sheets or graphene-covered SiC bulks. Moreover, we can obtain graphene-covered porous SiC produces stronger enhancement of Casimir friction in contrast with graphene-covered hBN. The Casimir friction of graphene-covered porous SiC can be tuned by the filling factor of SiC. We also present the calculation of the Casimir friction between the tip-plate configurations made with graphene-covered hBN through proximity force approximation. The coupling of graphene plasmon with HPPs effectively enhances the Casimir friction compared with either plasmons or HPPs. This significant enhancement of Casimir friction will have important applications in the experimental ultrasensitive force detection.
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