Study On Quantum Frictoin And Enhancement Of Quantum Friction Via Coupling Of Surface Phonon Polariton And Grapheme Plasmons

This paper presented the non-contact friction in the nano-tribological problem. The fluctuations of the electron distribution in the block and the fluctuation electromagnetic field around the block impact on the friction, introduction of quantum friction, and compared the results of the theory of quantum Coulomb drag（non-contact） friction and the contribution of electromagnetic field fluctuation to the friction. Found to have certain consistency in the approximation results of the calculation. A discussion of quantum friction about graphene on a substrate of amorphous SiO₂, was found by appropriate select the materials of the upper and lower surface can strengthen the coupling of the phonon polarization and the plasma, result in the magnitude of the induced potential difference can be experimentally measured. Then, detailed results of quantum friction between the graphene with SiC substrate were discussed. Since SiC can support surface phonon polaron and graphene can support surface plasmons, so surface phonons polaron and plasmons can be coupled in a certain frequency range. It was found with respect to pure graphene or SiC, because the surface phonon polaron and the graphene plasmon interaction. the friction between the graphene with SiC substrate will be greatly enhanced. Due to the quantum friction coefficient is very small, even now the experimental technology to detect, the enhanced quantum friction benefits the experimental research on friction. In addition, we found that the quantum friction coefficient first increase and then reduce with the increase of the chemical potential of graphene. the friction coefficient can be made maximum.