Phys. Rev. Lett. 56, 792–795 (1986)Evidence for Aharonov-Bohm effect with magnetic field completely shielded from electron waveReceived 4 December 1985; published in the issue dated 24 February 1986 Evidence for the Aharonov-Bohm effect was obtained with magnetic fields shielded from the electron wave. A toroidal ferromagnet was covered with a superconductor layer to confine the field, and further with a copper layer for complete shielding from the electron wave. The expected relative phase shift was detected with electron holography between two electron beams, one passing through the hole of the toroid, and the other passing outside. The experiment gave direct evidence for flux quantization also. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.792
DOI:
10.1103/PhysRevLett.56.792
PACS:
03.65.Bz, 41.80.Dd
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