Thermoelectricity in a junction between interacting cold atomic Fermi gases

Sekera, Tibor and Bruder, Christoph and Belzig, Wolfgang. (2016) Thermoelectricity in a junction between interacting cold atomic Fermi gases. Phys. Rev. A, 94 (3). 033618.

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Official URL: http://edoc.unibas.ch/52047/

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A gas of interacting ultracold fermions can be tuned into a strongly interacting regime using a Feshbach resonance. Here, we theoretically study quasiparticle transport in a system of two reservoirs of interacting ultracold fermions on the BCS side of the BCS-BEC crossover coupled weakly via a tunnel junction. Using the generalized BCS theory, we calculate the time evolution of the system that is assumed to be initially prepared in a nonequilibrium state characterized by a particle number imbalance or a temperature imbalance. A number of characteristic features like sharp peaks in quasiparticle currents or transitions between the normal and superconducting states are found. We discuss signatures of the Seebeck and the Peltier effects and the resulting temperature difference of the two reservoirs as a function of the interaction parameter (k(F)a)(-1). The Peltier effect may lead to an additional cooling mechanism for ultracold fermionic atoms.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph and Sekera, Tibor
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Feb 2017 13:26
Deposited On:13 Feb 2017 13:26

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