Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 26: Transport - Poster Session

TT 26.1: Poster

Mittwoch, 29. März 2006, 14:30–18:30, P1

Heat transport in ac-driven nanostructures — •Michael Straß¹, Miguel Rey², Sigmund Kohler¹, Fernando Sols³, and Peter Hänggi¹ — ¹Institut für Physik, Universität Augsburg, 86135 Augsburg — ²Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain — ³Departamento de Física Teórica de Materiales,Universidad Complutense de Madrid, 28040 Madrid, Spain

The charge transport in nanoscale conductors driven by an external, alternating electric field is subject to many recent studies, whereas the mechanisms of heat transfer of nanoconductors far from equilibrium are fairly unknown. In our model calculations, we consider an ac-driven system connected to two leads. The heat current defined by the energy transfer from one metallic lead to the central region is computed with a Floquet theory making use of the time periodicity of the driving. In particular, thermo-electric effects of a ac-driven two-level system induced by a finite temperature difference in the leads are investigated. Open double-quantum dots represent an ideal realization for those kind of systems. The results obtained by the Floquet approach are compared to a different numerical treatment based on a transfer-matrix method.