DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2007 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 13: Poster 1

HL 13.25: Poster

Monday, March 26, 2007, 15:00–17:30, Poster A

Quantum dot as a thermal rectifierRalf Scheibner1, •Christian Praetorius1, Ines Hense1, Markus König1, Dirk Reuter2, Andreas Wieck2, Hartmut Buhmann1, and Laurens Molenkamp11Physikalisches Institut (EP3), Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstraße 150, 44780 Bochum, Germany

A magnetic field parallel to the plane of a 2DEG is used to control the energy distribution of states in a gate defined quantum dot. In high magnetic fields, rearrangements in the spin system favor states with a high orbital quantum number and introduce an asymmetry in the coupling of the quantum dot to its leads. We investigate the electric, thermo-electric, and thermal transport properties in this case of an asymmetric quantum dot-lead coupling. Thermovoltage measurements agree well with numerical analysis on the basis of a resonant tunneling model for transport using measurements data from non-linear conductance measurements. Further theoretical model investigations reveal that the quantum dot intrinsically acts as a thermal rectifier.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2007 > Regensburg