Josephson tunneling in Bi2Sr2CaCu2O8+δ single-crystal break junctions

H. J. Tao; Farun Lu; G. Zhang; E. L. Wolf

doi:10.1016/0921-4534(94)90612-2

Josephson tunneling in Bi₂Sr₂CaCu₂O_8+δ single-crystal break junctions

H. J. Tao, Farun Lu, G. Zhang, E. L. Wolf

Applied Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Josephson tunneling I-V characteristics have been observed in break junctions of oxygen-annealed Bi₂Sr₂CaCu₂O₈ (Bi-2212) single crystals, with I_cR_n≈21.3 mV, and with a sharp quasiparticle edge at 2Δ≈2×20 mV. This demonstrates that low values of the I_cR_n product, thus far as observed in HTS thin-film junctions, do not represent a fundamental limitation. The sharp quasi-particle current rise at eV=2Δ in these SIS break junctions appears to afford an accurate measurement to be made of a well-defined gap edge.

Original language	English (US)
Pages (from-to)	117-120
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	224
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90612-2
State	Published - Apr 20 1994

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(94)90612-2

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title = "Josephson tunneling in Bi2Sr2CaCu2O8+δ single-crystal break junctions",

abstract = "Josephson tunneling I-V characteristics have been observed in break junctions of oxygen-annealed Bi2Sr2CaCu2O8 (Bi-2212) single crystals, with IcRn≈21.3 mV, and with a sharp quasiparticle edge at 2Δ≈2×20 mV. This demonstrates that low values of the IcRn product, thus far as observed in HTS thin-film junctions, do not represent a fundamental limitation. The sharp quasi-particle current rise at eV=2Δ in these SIS break junctions appears to afford an accurate measurement to be made of a well-defined gap edge.",

author = "Tao, {H. J.} and Farun Lu and G. Zhang and Wolf, {E. L.}",

note = "Funding Information: This work was supportebdy the AFOSR, Grant F 49620-93-112 4,and in part by the NationalC enter for Researcha ndD evelopmenotn Superconductivity, Beijing.W e gratefulltyh ankB . Yin of The Institute of Physicsf or providingth e DC magnetiscu s-ceptibilitmy easuremeonft the Bi-2212c rystal.",

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doi = "10.1016/0921-4534(94)90612-2",

language = "English (US)",

volume = "224",

pages = "117--120",

journal = "Physica C: Superconductivity and its applications",

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T1 - Josephson tunneling in Bi2Sr2CaCu2O8+δ single-crystal break junctions

AU - Tao, H. J.

AU - Lu, Farun

AU - Zhang, G.

AU - Wolf, E. L.

N1 - Funding Information: This work was supportebdy the AFOSR, Grant F 49620-93-112 4,and in part by the NationalC enter for Researcha ndD evelopmenotn Superconductivity, Beijing.W e gratefulltyh ankB . Yin of The Institute of Physicsf or providingth e DC magnetiscu s-ceptibilitmy easuremeonft the Bi-2212c rystal.

PY - 1994/4/20

Y1 - 1994/4/20

N2 - Josephson tunneling I-V characteristics have been observed in break junctions of oxygen-annealed Bi2Sr2CaCu2O8 (Bi-2212) single crystals, with IcRn≈21.3 mV, and with a sharp quasiparticle edge at 2Δ≈2×20 mV. This demonstrates that low values of the IcRn product, thus far as observed in HTS thin-film junctions, do not represent a fundamental limitation. The sharp quasi-particle current rise at eV=2Δ in these SIS break junctions appears to afford an accurate measurement to be made of a well-defined gap edge.

AB - Josephson tunneling I-V characteristics have been observed in break junctions of oxygen-annealed Bi2Sr2CaCu2O8 (Bi-2212) single crystals, with IcRn≈21.3 mV, and with a sharp quasiparticle edge at 2Δ≈2×20 mV. This demonstrates that low values of the IcRn product, thus far as observed in HTS thin-film junctions, do not represent a fundamental limitation. The sharp quasi-particle current rise at eV=2Δ in these SIS break junctions appears to afford an accurate measurement to be made of a well-defined gap edge.

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Josephson tunneling in Bi₂Sr₂CaCu₂O_8+δ single-crystal break junctions

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