Mesoscopic proximity effect probed through superconducting contacts

Abstract

We investigate the properties of complex mesoscopic superconducting-normal hybrid devices, Andreev-Interferometers in the case, where the current is proped through a superconducting tunneling contact whereas the proximity effect is generated by a transparent SN-interface. We show within the quasiclassical Green's functions technique, how the fundamental SNIS-element of the such structures can be mapped onto an effective S${}^{\prime }$IS-junction, where S${}^{\prime }$ is the proximised material with an effective energy gap $E_g<\Delta$. We propose the Andreev-Interferometer, where $E_g$ can be tuned by an external phase $\varphi$ and displays maxima at 0 mod $2\pi$ and minima at $\pi$ mod $2\pi$. This leads to peculiar current-phase-relations We propose an experiment to verify our predictions and show, how our results are consistent with recent, unexplained experimental results.

4 Pages, 9 .eps figures, submitted to Phys. Rev. B

References in corpus (3)

• Quasiclassical Green's function approach to mesoscopic superconductivity
• Proximity-induced transport in hybrid mesoscopic normal-superconducting metal structures
• $\pi -$shifted magnetoconductance oscillations in mesoscopic superconducting-normal-heterostructures

Cited by in corpus (4)

• Phase dependent multiple Andreev reflections in SNS interferometers
• Proximity Effect and Multiple Andreev Reflections in Chaotic Josephson junctions
• Secondary "Smile"-gap in the density of states of a diffusive Josephson junction for a wide range of contact types
• Peculiarities of the density of states in SN junctions