期刊
JOURNAL OF APPLIED PHYSICS
卷 116, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4887354
关键词
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资金
- ANR under Project MASH [ANR-12-BS04-0016-MASH]
We propose a scheme to measure both the current-phase relation and differential conductance dI/dV of a superconducting junction, in the normal and the superconducting states. This is done using a dc Superconducting Quantum Interference Device with two Josephson junctions in parallel with the device under investigation and three contacts. As a demonstration, we measure the current-phase relation and dI/dV of a small Josephson junction and a carbon nanotube junction. In this latter case, in a regime where the nanotube is well conducting, we show that the non-sinusoidal current phase relation we find is consistent with the theory for a weak link, using the transmission extracted from the differential conductance in the normal state. This method holds great promise for future investigations of the current-phase relation of more exotic junctions. (C) 2014 AIP Publishing LLC.
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