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Aharonov-Bohm magnetoconductance oscillations have been measured in series arrays of 1, 3, 10, and 30 submicron-diameter Ag loops. At constant temperature, the amplitude of the h/e oscillations is observed to decrease as the square root of number of loops, while the amplitude of h/2e conductance oscillations, measured in the same samples, is independent of the number of series loops. This is direct confirmation of the ensemble averaging properties of h/e oscillations in multiloop systems. The amplitude of the h/e oscillations is in good agreement with recent calculations.


Umbach, C. P., Van Haesendonck, C., Laibowitz, R. B., Washburn, S., Webb, R. A. (1986). Direct observation of ensemble averaging of the Aharonov-Bohm effect in normal-metal loops. Physical Review Letters, 56(4), 386-389. DOI: 10.1103/PhysRevLett.56.386

© Physical Review Letters, 1986, American Physical Society

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