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.
@article{arxiv.0903.5097,
title = {Edge-State Velocity and Coherence in a Quantum Hall Fabry-Perot Interferometer},
author = {D. T. McClure and Yiming Zhang and B. Rosenow and E. M. Levenson-Falk and C. M. Marcus and L. N. Pfeiffer and K. W. West},
journal= {arXiv preprint arXiv:0903.5097},
year = {2009}
}