Abstract
We analytically investigate effective spin–orbit coupling (SOC) and potential energy on electronic and thermoelectric transport properties for a graphene–silicene–graphene (GSG) heterojunction with armchair-edge nanoribbons using nonequilibrium Green's function method. The calculation shows that the transmission coefficient T and the charge Seebeck coefficient SC for armchair-edge GSG junctions display the oscillatory behavior and depend sensitively on both effective SOC λSO and the potential energy V0. Compared with zigzag-edge GSG heterojunctions, armchair-edge GSG heterojunctions are found to posses superior thermoelectric performance, their charge Seebeck coefficients can be improved by one order of magnitude.
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