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Graphene is perhaps the most prominent "Dirac material," a class of systemswhose electronic structure gives rise to charge carriers that behave asrelativistic fermions. In multilayer graphene several crystal sheets arestacked such that the honeycomb lattice of each layer is displaced along one ofthe lattice edges. When subject to an external magnetic field, the scaling ofthe multilayer energy spectrum with the magnetic field, and thus the system'sthermodynamic behavior, depends strongly on the number of layers. With this inmind, we examine the performance of a finite-time endoreversible Otto cyclewith multilayer graphene as its working medium. We show that there exists asimple relationship between the engine efficiency and the number of layers, andthat the efficiency at maximum power can exceed that of a classicalendoreversible Otto cycle.

Multilayer Graphene as an Endoreversible Otto Engine