Homointerface planar Josephson junction based on inverse proximity effect

Homointerface planar Josephson junction based on inverse proximity effect

The quality of a superconductor-normal metal-superconductor Josephson junction (JJ) depends crucially on the transparency of the superconductor-normal metal (S/N) interface. We demonstrate a technique for fabricating planar JJs with perfect S/N interfaces. The technique utilizes a strong inverse...

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Bibliographic Details
Main Authors: Fan, Juewen, Jiang, Bingyan, Zhao, Jiaji, Bi, Ran, Zhou, Jiadong, Liu, Zheng, Kang, Ning, Qu, Fanming, Lu, Li, Wu, Xiaosong
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2022
Subjects:
Engineering::Materials
Josephson Junction Devices
Superconducting Films
Online Access:https://hdl.handle.net/10356/161242
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Institution: Nanyang Technological University
Language: English
Description
Summary:The quality of a superconductor-normal metal-superconductor Josephson junction (JJ) depends crucially on the transparency of the superconductor-normal metal (S/N) interface. We demonstrate a technique for fabricating planar JJs with perfect S/N interfaces. The technique utilizes a strong inverse proximity effect discovered in Al/V$_5$S$_8$ bilayers, by which the Al layer is driven into the resistive state. The highly transparent S/N homointerface and the peculiar normal metal enable the flow of Josephson supercurrent across a 2.9 $\mu$m long weak link. Moreover, our JJ exhibits a giant critical current and a large product of the critical current and the normal state resistance.

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