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One can use light to tune certain materials, from a trivial to a topologicalphase. A prime example of such materials, classified as Floquet topologicalinsulators (FTI), is epitaxial graphene. In this paper, we probe thetopological phase transition of an FTI via the efficiency and work output ofquantum Otto and quantum Stirling heat engines. A maximum/minimum in theefficiency or work output invariably signals the phase transition point.Further, both engines' work output and efficiency are markedly robust againstthe polarization direction of light.

A thermodynamic probe of the topological phase transition in epitaxial graphene based Floquet topological insulator