Fabrication of Intrinsic Josephson Junctions on Bi2Sr2CaCu2O8+δ Single Crystals with Reproducible Surface Junctions

Chin. Phys. Lett.

2002, Vol. 19

Issue (12): 1859-1862 DOI:

Original Articles

Fabrication of Intrinsic Josephson Junctions on Bi₂Sr₂CaCu₂O_8+δ Single Crystals with Reproducible Surface Junctions

ZHU Xiao-Bo;ZHAO Shi-Ping;CHEN Geng-Hua;XIE Si-Shen;YANG Qian-Sheng

Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080

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ZHU Xiao-Bo, ZHAO Shi-Ping, CHEN Geng-Hua et al 2002 Chin. Phys. Lett. 19 1859-1862

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Abstract Intrinsic Josephson junctions on Bi₂Sr₂CaCu₂O_8+δ single crystals are successfully fabricated using photolithography and Ar ion milling. Here we discuss the properties of the surface CuO₂/metal bilayers and surface junctions prepared with different crystal cleavage conditions and metal film deposition techniques. We show that by cleaving the crystal at liquid nitrogen temperature in vacuum, the contents of the (interstitial) oxygen in the Bi-O layers become stable upon cleavage, leading to a CuO₂/metal bilayer and to surface junctions with reproducible properties. These results can be useful for practical device fabrications as well as for the studies of the contact properties between high T_c superconductors and normal metals.

Keywords: 74.50.+r 74.72.Hs 74.80.Dm

Published: 01 December 2002

PACS:	74.50.+r	(Tunneling phenomena; Josephson effects)
	74.72.Hs
	74.80.Dm

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2002/V19/I12/01859

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	ZHU Xiao-Bo
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	YANG Qian-Sheng

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