Abstract
Due to the promising applications in energy harvesting, quantum heat engines at the nanoscale has attracted much interest in the past decades. Here the thermoelectric properties of a silicene based antiferromagnetic/ferromagnetic junction are investigated. The maximum power Pmax and the efficiency at maximum power η(Pmax) can be modulated by the gate voltage Vg, and be comparable to or even better than that of recent proposals based on two terminal graphene system. In addition, because of the specific spin and valley dependent band-matching tunneling mechanism, there exists a plateau in the Pmax (η(Pmax)) versus Vg curves, which is sensitive to T and vanishes at high T. This indicates the silicene junction can operate as a highly efficient quantum heat engine.
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