Spin-dependent heat and thermoelectric currents in a Rashba ring coupled to a photon cavity

TL;DR

This paper theoretically investigates how Rashba spin-orbit interaction and photon cavity coupling influence heat and thermoelectric currents in a quantum ring, revealing controllable and tunable transport properties for potential device applications.

Contribution

It introduces a theoretical model showing how photon cavity coupling and Rashba interaction can control heat and thermoelectric currents in a quantum ring.

Findings

Heat current is suppressed by photon field due to two-electron and photon replica states.

Thermoelectric current remains unaffected by photon field parameters.

Resonant conditions enable control of currents via Rashba spin-orbit interaction.

Abstract

Spin-dependent heat and thermoelectric currents in a quantum ring with Rashba spin-orbit interaction placed in a photon cavity are theoretically calculated. The quantum ring is coupled to two external leads with different temperatures. In a resonant regime, with the ring structure in resonance with the photon field, the heat and the thermoelectric currents can be controlled by the Rashba spin-orbit interaction. The heat current is suppressed in the presence of the photon field due to contribution of the two-electron and photon replica states to the transport while the thermoelectric current is not sensitive to changes in parameters of the photon field. Our study opens a possibility to use the proposed interferometric device as a tunable heat current generator in the cavity photon field.