Speaker
Mr
Marc P. Röösli
(ETH Zürich)
Description
We study the electronic transport properties of weakly coupled 1µm-large quantum dots (QDs) defined in GaAs/AlGaAs-heterostructures in the integer and fractional quantum Hall regime. Between filling factor 2 > ν > 1, the Coulomb resonances observed in the current through the QD are modified whenever an electron tunnels between the two Landau levels. Additionally, we employ charge detection and real-time counting techniques to measure tunneling between the Landau levels time-resolvedly. We observe similar behaviour for the first time in the fractional QH regime ν < 1. The presented investigations pave the way for time-resolved measurements of quasiparticle tunneling between fractional QH states predicted to exhibit anyonic statistics.
Author
Mr
Marc P. Röösli
(ETH Zürich)
Co-authors
Dr
Beat Braem
(ETH Zürich)
Dr
Szymon Hennel
(ETH Zürich)
Mr
Lars Brem
(ETH Zürich)
Mr
Giorgio Nicoli
(ETH Zürich)
Mr
Benedikt Kratochwil
(ETH Zürich)
Dr
Annika Kurzmann
(ETH Zürich)
Dr
Matthias Berl
(ETH Zürich)
Dr
Christian Reichl
(ETH Zürich)
Prof.
Werner Wegscheider
(ETH Zürich)
Prof.
Thomas Ihn
(ETH Zürich)
Prof.
Klaus Ensslin
(ETH Zürich)
