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VOLUME 60 (1994) | ISSUE 8 | PAGE 589
Phase controlled mesoscopic ring interferometer
The conductance oscillations in a normal metal mesoscopic ring, to which a superconducting wire is attached at two points was measured. The oscillations are due to a phase transfer from the superconducting condensate to normal electrons via Andreev reflections at the normal metal-superconductor interfaces. The phase difference between the interfaces was controlled by varying a subcritical current through the superconductor and, alternatively, by applying a magnetic field. New components were found in the spectrum of oscillations. © 1994 American Institute of Physics,