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VOLUME 54 (1991) | ISSUE 4 | PAGE 245
Resistance of mesoscopic S-N-S junctions
As the dimensions of metallic conductors are reduced, the resistance of the conductors begins to increase, while the magnetoresistance changes sign when the contacts go into a superconducting state. An explanation is proposed on the basis of a quantization of the energy of electrons by virtue of Andreev reflection from N-S interfaces.