Aharonov–Bohm-like oscillations in Fabry–Perot interferometers

An experimental study of a Fabry-Perot interferometer in the quantum Hall regime reveals Aharonov-Bohm-like (ABL) oscillations. Unlike the Aharonov-Bohm effect, which has a period of one flux quantum, 80, ABL oscillations possess a flux period of 80/f , where f is the integral value of fully filled Landau levels in the constrictions. The detection of ABL oscillations is limited to the low magnetic field side of the c = 1,2,4,6,..., integer quantum Hall plateaus. These oscillations can be understood within the Coulomb- dominated model of quantum Hall interferometers as forward tunneling and backscattering, respectively, through the center of the interferometer from the bulk and the edge states.