Interaction-induced charge transfer in a mesoscopic electron spectrometer

by Stefan Fischer

Ben Gurion University
at Condensed Matter Theory Seminar

Wed, 10 Apr 2019, 13:30
Sacta-Rashi Building for Physics (54), room 207


A novel electron spectrometer, devised in the Ensslin/Ihn research groups at the ETH Zürich, allows to analyze charge transfer processes caused solely by energetic relaxation of the device’s electronic system. The spectrometer, in which two quantum dots couple to a two-dimensional electron gas, reveals several transfer processes with distinct energetic signatures. Surprisingly, transfer is measured at energies exceeding the energy of originally injected electrons.
Taking into account both tunneling as well as interactions within and between the setup’s individual components, a non-equilibrium diagrammatic approach allows us to assign a series of diagrams to these transfer processes, and to thereby pinpoint their physical origin. Our results indicate that interactions between well-separated edge channels play a more significant role for energy relaxation than commonly expected.

Created on 04-04-2019 by Schechter, Moshe (smoshe)
Updaded on 04-04-2019 by Schechter, Moshe (smoshe)