Aharonov-Bohm interference of fractional quantum Hall edge modes
arXiv:1901.08452 · doi:10.1038/s41567-019-0441-8
Abstract
We demonstrate operation of a small Fabry-Perot interferometer in which highly coherent Aharonov-Bohm oscillations are observed in the integer and fractional quantum Hall regimes. Using a novel heterostructure design, Coulomb effects are drastically suppressed. Coherency of edge mode interference is characterized by the energy scale for thermal damping, at . Selective backscattering of edge modes originating in the Landau levels allows for independent determination of inner and outer edge mode velocities. Clear Aharonov-Bohm oscillations are observed at fractional filling factors and . Our device architecture provides a platform for measurement of anyonic braiding statistics.
18 pages, 11 figures. A revised version of this manuscript and supplementary material will appear in Nature Physics
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