Abstract
Using model interaction Hamiltonians for both electrons and phonons and Green’sfunction formalism for ballistic transport, we have studied the thermal conductanceand the thermoelectric properties of graphene nanoribbons (GNR), GNRjunctions and periodic superlattices. Among our findings we have establishedthe role that interfaces play in determining the thermoelectric response of GNRsystems both across single junctions and in periodic superlattices. In general,increasing the number of interfaces in a single GNR system increases the peakZT values that are thus maximized in a periodic superlattice. Moreover, we proved thatthe thermoelectric behavior is largely controlled by the width of the narrowercomponent of the junction. Finally, we have demonstrated that chevron-typeGNRs recently synthesized should display superior thermoelectric properties.
Published Version
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