Dresden 2017 – scientific programme
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MA: Fachverband Magnetismus
MA 18: Transport: Quantum Coherence and Quantum Information Systems - Theory (jointly with MA, HL)
MA 18.13: Talk
Tuesday, March 21, 2017, 12:45–13:00, HSZ 103
Apparent pairing and subperiods in integer quantum Hall interferometers — •Giovanni Andrea Frigeri1,3, Daniel Scherer2, and Bernd Rosenow3 — 1Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany — 2Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark — 3Institut für Theoretische Physik, Universität Leipzig, Leipzig, Germany
We analyze the magnetic field and gate voltage dependence of the conductance in an integer quantum Hall Fabry-Pérot interferometer, taking into account the interactions between an interfering edge mode, a non-interfering edge mode and the bulk. For weak bulk-edge coupling and sufficiently strong inter-edge interaction, we observe that the interferometer operates in the Aharonov-Bohm regime with a flux periodicity halved respect to the usual expectation. Even in the regime of strong bulk-edge coupling, this behavior can be observed as a subperiodicity of the interference signal in the Coulomb dominated regime. We do not find evidence for a connection between a reduced flux period and electron pairing, though. Our results can reproduce recent experimental findings.