Thermoelectric and thermospin transport in a ballistic junction of graphene

Thermoelectric and thermospin transport in a ballistic junction of graphene

We consider theoretically a wide graphene ribbon that is attached on both ends 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 the Rashba type. We calculate the thermally induc...

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Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2015-08, Vol.92 (8), Article 085418
Hauptverfasser: Inglot, M., Dugaev, V. K., Barnaś, J.
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Sprache:eng
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Condensed matter
Electric current
Graphene
Reservoirs
Ribbons
Spintronics
Thermoelectricity
Transport
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creator Inglot, M.
Dugaev, V. K.
Barnaś, J.
description We consider theoretically a wide graphene ribbon that is attached on both ends 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 the 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 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.
doi_str_mv 10.1103/PhysRevB.92.085418
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subjects Condensed matter
Electric current
Graphene
Reservoirs
Ribbons
Spintronics
Thermoelectricity
Transport
title Thermoelectric and thermospin transport in a ballistic junction of graphene
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