Electronic and thermoelectric transport properties for a zigzag graphene–silicene–graphene heterojunction modulated by external field

•The transmission coefficient and the charge Seebeck coefficient for a GSG heterojunction display the oscillatory behavior.•The even–odd difference in transmission coefficient and the charge Seebeck coefficient disappears in the GSG heterojunction.•The transmission coefficient and the charge Seebeck coefficient for GSG heterojunction can be effectively modulated by effective SOC λSOλSO and V0V0.

we investigate the electronic and thermoelectric transport properties for a graphene–silicene–graphene (GSG) heterojunction with zigzag-edge nanoribbons under the modulation of the effective spin–orbit coupling (SOC) and potential energy. Using the nonequilibrium Green's function method, it is demonstrated that both the transmission coefficient T   and the charge Seebeck coefficient SCSC display the oscillatory behavior and can be effectively modulated by effective SOC λSOλSO and the potential energy V0V0. Furthermore, the even–odd difference in transport and thermoelectric properties disappears in the GSG heterojunction. Additionally, the dependence of the transmission coefficient and the charge Seebeck coefficient on Anderson disorder strength has been studied.