Efficiency of three-terminal thermoelectric transport under broken-time reversal symmetry
arXiv:1301.1570 · doi:10.1103/PhysRevB.87.165419
Abstract
We investigate thermoelectric efficiency of systems with broken time reversal symmetry under a three-terminal transport. Using a model of Aharonov-Bohm interferometer formed with three noninteracting quantum dots, we show that Carnot efficiency can be achieved when the thermopower is a symmetric function of the applied magnetic field. On the other hand, the maximal value of the efficiency at maximum power is obtained for asymmetric thermopower. Indeed, we show that Curzon-Ahlborn limit is exceeded within the linear response regime in our model. Moreover, we investigate thermoelectric efficiency for random Hamiltonians drawn from the Gaussian Unitary Ensemble and for a more abstract transmission model. In this latter model we find that the efficiency is improved using sharp energy-dependent transmission functions.
10 pages, 8 figures
References in corpus (5)
Cited by in corpus (10)
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