$\pi -$shifted magnetoconductance oscillations in mesoscopic superconducting-normal-heterostructures

Abstract

Interference of proximity induced superconducting correlations in mesoscopic metallic rings is sensitive to the magnetic flux $\Phi$ 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 $\pi$ 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.

4 Pages, 5 postscript figures. Submitted to Phys. Rev. Lett

References in corpus (9)

• Quasiclassical Green's function approach to mesoscopic superconductivity
• Local Density of States in a Dirty Normal Metal connected to a Superconductor
• Phase coherent transport in hybrid superconducting nanostructures
• Diffusive conductors as Andreev interferometers
• Long-Range Coherence in a Mesoscopic Metal near a Superconducting Interface
• Coherent Charge Transport in Metallic Proximity Structures
• Reentrant behavior in the superconducting phase-dependent resistance of a disordered 2-dimensional electron gas
• Diffusive and ballistic motion in superconducting hybrid structures
• Coherent Electron Transport in Superconducting-Normal Metallic Films

Cited by in corpus (3)

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