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- W3208029932 abstract "We theoretically investigate the non-equilibrium steady-state electric and thermoelectric transport properties of a quantum dot coupled to the normal metallic and s-wave superconducting reservoirs in the Coulomb blockade regime. Using non-equilibrium Keldysh Green's function formalism within Hubbard-Romannum{1} approximation, we have initially analyse the thermoelectric transport properties within the linear response regime. Further, within the non-linear regime, we have analyse two different situations (romannum{1}) the finite voltage biasing between isothermal reservoirs and (romannum{2}) the finite thermal gradient in the context of thermoelectric heat engines. In the former case, we focus on the heat dissipation and thermal rectification effect. It is seen that the subgap Andreev heat current can become finite beyond the linear response regime and play a vital role in asymmetric heat dissipation and rectification for low voltage biasing. In the latter case, we study the variation of thermopower, maximum power output, and corresponding efficiency with the thermal gradient. We find that the single-particle tunnelling close to the superconducting gap edge can generate a relatively large thermopower, power output, and efficiency. There is also a relatively small contribution from the Andreev tunnelling processes in the non-linear regime. Interestingly, to understand electric and thermoelectric transport properties at finite temperature in the Coulomb blockade regime, the proximity-induced superconducting gap on the dot state does not play any role. Our results thus show that hybrid superconductor-quantum dot nano-structures are a promising candidate for low-temperature thermal applications." @default.
- W3208029932 created "2021-11-08" @default.
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- W3208029932 date "2021-11-01" @default.
- W3208029932 modified "2023-09-27" @default.
- W3208029932 title "Non-equilibrium thermoelectric transport through normal metal-Quantum dot-Superconductor hybrid system in the Coulomb blockade regime" @default.
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