π-shifted magnetoconductance oscillations in mesoscopic superconducting-normal heterostructures

V. N. Antonov, H. Takayanagi, F. K. Wilhelm, A. D. Zaikin

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Interference of proximity-induced superconducting correlations in mesoscopic metallic rings is sensitive to the magnetic flux Φ inside these rings. This is the reason for magnetoconductance oscillations in such systems. We detected experimentally and explained theoretically a novel effect: the phase of these oscillations can switch between 0 and π depending on the resistance of intermetallic interfaces and temperature. The effect is due to a nontrivial interplay between the proximity-induced enhancement of the local conductivity and the proximity-induced suppression of the density of states at low energies.

Original languageEnglish
Pages (from-to)250-256
Number of pages7
JournalEurophysics Letters
Volume50
Issue number2
DOIs
Publication statusPublished - 11 Apr 2000
Externally publishedYes

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