title: Edge-state velocity and coherence in a quantum Hall Fabry-Pérot interferometer.
abstract: We investigate nonlinear transport in electronic Fabry-Pérot interferometers in the integer quantum Hall regime. For interferometers sufficiently large that Coulomb blockade effects are absent, a checkerboardlike 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-vector x B-vector 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.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: McClure
authors.forename: Yiming
authors.initials: Y
authors.lastname: Zhang
authors.forename: B
authors.initials: B
authors.lastname: Rosenow
authors.forename: E M
authors.initials: EM
authors.lastname: Levenson-Falk
authors.forename: C M
authors.initials: CM
authors.lastname: Marcus
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: K W
authors.initials: KW
authors.lastname: West