Phase Controlled Superconducting Proximity Effect Probed by Tunneling Spectroscopy

H. le Sueur; P. Joyez; H. Pothier; C. Urbina; D. Esteve

doi:10.1103/PhysRevLett.100.197002

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Phase Controlled Superconducting Proximity Effect Probed by Tunneling Spectroscopy

H. le Sueur, P. Joyez, H. Pothier, C. Urbina, D. Esteve

DOI 10.1103/PhysRevLett.100.197002 · Physical Review Letters

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Abstract

Using a dual-mode STM-AFM microscope operating below 50 mK we measured the local density of states along small normal wires connected at both ends to superconductors with different phases. We observe that a uniform minigap can develop in the whole normal wire and in the superconductors near the interfaces. The minigap depends periodically on the phase difference. The quasiclassical theory of superconductivity applied to a simplified 1D model geometry accounts well for the data.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown