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Seo, Kwanyong
The SEO Group
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  • Flexible solar cell, transparent solar cell, PV-battery hybrid system, hetero-junction solar cell

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Superconducting Junction of a Single-Crystalline Au Nanowire for an Ideal Josephson Device

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Title
Superconducting Junction of a Single-Crystalline Au Nanowire for an Ideal Josephson Device
Other Titles
Superconducting Junction of a Single-Crystalline Au Nanowire for an Ideal Josephson Device
Author
Jung, MinkyungNoh, HyunhoDoh, Yong-JooSong, WoonChong, YonukChoi, Mahn-SooYoo, YoungdongSeo, KwanyongKim, NamWoo, Byung-ChillKim, BongsooKim, Jinhee
Keywords
Au nanowire; single-crystalline; superconducting proximity effect; Josephson junction; Shapiro step
Issue Date
2011-03
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.5, no.3, pp.2271 - 2276
Abstract
We report on the fabrication and measurements of a superconducting junction of a single-crystalline Au nanowire, connected to Al electrodes. The current-voltage characteristic curve shows a clear supercurrent branch below the superconducting transition temperature of Al and quantized voltage plateaus on application of microwave radiation, as expected from Josephson relations. Highly transparent (0.95) contacts very close to an Ideal limit of 1 are formed,at the, interface between the normal metal (Au) and the superconductor (Al). The very high transparency is ascribed to the single crystallinity of a Au nanowire and the formation of an oxide-free contact between Au and Al. The subgap structures of the differential conductance are well explained by coherent multiple Andreev reflections (MAR), the hallmark of mesoscopic Josephson junctions. These observations demonstrate that single crystalline Au nanowires can be employed to develop novel quantum devices utilizing coherent electrical transport
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DOI
10.1021/nn1035679
ISSN
1936-0851
Appears in Collections:
ECHE_Journal Papers
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