Superconducting Proximity Effect Probed on a Mesoscopic Length Scale.
نویسندگان
چکیده
We have measured by tunneling spectroscopy the electronic density of states in a nonsuperconducting wire in good contact with a superconductor, at distances of 200, 300, and 800 nm from the interface. Closest to the interface, the density of states near the Fermi energy is reduced to 55% of its normal value. At the farthest measurement point, this dip has nearly completely disappeared. We compare our data to predictions based on the Usadel equations. [S0031-9007(96)01337-3]
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ورودعنوان ژورنال:
- Physical review letters
دوره 77 14 شماره
صفحات -
تاریخ انتشار 1996