Phase memory effects in mesoscopic rings with superconducting ''mirrors''

V. T. Petrashov, V. N. Antonov, P. Delsing, R. Claeson

Research output: Contribution to journalArticlepeer-review

135 Citations (Scopus)

Abstract

We find a drastic difference between the magnetoresistance of normal-metal (Ag) mesoscopic rings with superconducting boundaries (mirrors) and that of plain rings. The amplitude of h/2e Aharanov-Bohm oscillations is enhanced more than 100 times in rings with mirrors in the measuring leads. Rings with mirrors in stubs perpendicular to the current flow show h/4e and h/2e oscillations and evidence of a superconducting transition. The resutls are interpreted as due to a phase coupling between the superconductors via normal electrons, and to a confinement of quasiparticles to the ring by Andreev reflections.

Original languageEnglish
Pages (from-to)347-350
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number3
DOIs
Publication statusPublished - 1993
Externally publishedYes

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