Thermoelectric and thermospin transport in a ballistic junction of graphene

Abstract

We consider theoretically a wide graphene ribbon, that on both ends is attached to electronic reservoirs which generally have different temperatures. The graphene ribbon is assumed to be deposited on a substrate, that leads to a spin-orbit coupling of Rashba type. We calculate the thermally induced charge current in the ballistic transport regime as well as the thermoelectric voltage (Seebeck effect). Apart from this, we also consider thermally induced spin current and spin polarization of the graphene ribbon. The spin currents are shown to have generally two components; one parallel to the temperature gradient and the other one perpendicular to this gradient. The latter corresponds to the spin current due to the spin Nernst effect. Additionally, we also consider the heat current between the reservoirs due to transfer of electrons.

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Cited by in corpus (4)

• Spin-thermoelectric transport induced by interactions and spin-flip processes in two dimensional topological insulators
• Designing a highly efficient graphene quantum spin heat engine
• Spin-dependent thermoelectric effects in graphene based superconductor junctions
• Tunable magnetoresistance in spin-orbit coupled graphene junctions