Edge-State Velocity and Coherence in a Quantum Hall Fabry-Perot Interferometer

Details Edge-State Velocity and Coherence in a Quantum Hall Fabry-Perot Interferometer Edge-State Velocity and Coherence in a Quantum Hall Fabry-Perot Interferometer

2009-03-29

arxiv.org/abs/0903.5097v1

Phys. Rev. Lett. 103 206806 (2009).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevLett.103.206806

We investigate nonlinear transport in electronic Fabry-Perot interferometers in the integer quantum Hall regime. For interferometers sufficiently large that Coulomb blockade effects are absent, a checkerboard-like pattern of conductance oscillations as a function of dc bias and perpendicular magnetic field is observed. Edge-state velocities extracted from the checkerboard data are compared to model calculations and found to be consistent with a crossover from skipping orbits at low fields to E x B drift at high fields. Suppression of visibility as a function of bias and magnetic field is accounted for by including energy- and field-dependent dephasing of edge electrons.

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