Observation of Aharonov-Bohm Superperiod in a Laughlin Quasiparticle Interferometer

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  • 13 April 2005
Abstract
We report realization of a Laughlin quasiparticle interferometer, where quasiparticles of the 1/3 fractional quantum Hall fluid encircle an island of the 2/5 fluid. Interference fringes are observed as conductance oscillations, as in the Aharonov-Bohm effect. For the first time, we observe an Aharonov-Bohm superperiod of five magnetic flux quanta (5h/e) through the island. The corresponding 2e charge period is confirmed in calibrated gate experiments. These results are interpreted in terms of the anyonic statistical phase acquired by a quasiparticle of the 1/3 fluid encircling the quasiparticles of the 2/5 fluid.

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