Journal
SCIENCE
Volume 342, Issue 6159, Pages 713-715Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1242308
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Funding
- Swiss National Science Foundation
- National Centres of Competence in Research Materials with Novel Electronic Properties (MaNEP)
- Quantum Science and Technology (QSIT)
- European Research Council Project SQMS
- FP7 Project Nanodesigning of Atomic and Molecular Quantum Matter (NAME-QUAM)
- ETH Zurich Schrodinger chair
- Defense Advanced Research Projects Agency-OLE program
- Agence Nationale de la Recherche (Far From Equilibrium Quantum Systems)
- ETH Zurich
- European Union through a Marie Curie Fellowship
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Thermoelectric effects, such as the generation of a particle current by a temperature gradient, have their origin in a reversible coupling between heat and particle flows. These effects are fundamental probes for materials and have applications to cooling and power generation. Here, we demonstrate thermoelectricity in a fermionic cold atoms channel in the ballistic and diffusive regimes, connected to two reservoirs. We show that the magnitude of the effect and the efficiency of energy conversion can be optimized by controlling the geometry or disorder strength. Our observations are in quantitative agreement with a theoretical model based on the Landauer-Buttiker formalism. Our device provides a controllable model system to explore mechanisms of energy conversion and realizes a cold atom-based heat engine.
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