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Correlations of heat and charge currents in quantum-dot thermoelectric engines

AutorSánchez, Rafael ; Sothmann, Björn; Jordan, Andrew N.; Büttiker, Markus
Fecha de publicación2013
EditorInstitute of Physics Publishing
CitaciónNew Journal of Physics 15: 125001 (2013)
ResumenWe analyze the noise properties of both electric charge and heat currents as well as their correlations in a quantum-dot based thermoelectric engine. The engine is a three-terminal conductor with crossed heat and charge flows where heat fluctuations can be monitored by a charge detector. We investigate the mutual influence of charge and heat dynamics and how it is manifested in the current and noise properties. In the presence of energy-dependent tunneling, operating conditions are discussed where a charge current can be generated by heat conversion. In addition, heat can be pumped into the hot source by driving a charge current in the coupled conductor. An optimal configuration is found for structures in which the energy dependence of tunneling maximizes asymmetric transmission with maximal charge-heat cross-correlations. Remarkably, at a voltage that stalls the heat engine we find that in the optimal case the non-equilibrium state is maintained by fluctuations in the heat and charge currents only. © IOP Publishing and Deutsche Physikalische Gesellschaft.
DescripciónPaper part of Focus on Thermoelectric Effects in Nanostructures.
Versión del editorhttp://dx.doi.org/10.1088/1367-2630/15/12/125001
Identificadoresdoi: 10.1088/1367-2630/15/12/125001
issn: 1367-2630
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