Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8

T. Ekino; T. Minami; H. Fujii; J. Akimitsu

doi:10.1016/0921-4534(94)92171-7

Superconducting energy gaps in YBa₂Cu₃O₇ and Bi₂Sr₂CaCu₂O₈

T. Ekino, T. Minami, H. Fujii, J. Akimitsu

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

13 Citations (Scopus)

Abstract

We report tunneling measurements of the superconducting energy gaps in YBa₂Cu₃O₇ and Bi₂Sr₂CaCu₂O₈ using break junctions. The differential conductance dl/dV at T = 4.2 K shows no leakage around zero bias, while the gap edge peaks in dl/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi₂Sr₂CaCu₂O₈ is larger than that in YBa₂Cu₃O₇.

Original language	English
Pages (from-to)	1899-1900
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	235-240
Issue number	PART 3
DOIs	https://doi.org/10.1016/0921-4534(94)92171-7
Publication status	Published - Dec 1994
Externally published	Yes

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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title = "Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8",

abstract = "We report tunneling measurements of the superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8 using break junctions. The differential conductance dl/dV at T = 4.2 K shows no leakage around zero bias, while the gap edge peaks in dl/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi2Sr2CaCu2O8 is larger than that in YBa2Cu3O7.",

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T1 - Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8

AU - Ekino, T.

AU - Minami, T.

AU - Fujii, H.

AU - Akimitsu, J.

PY - 1994/12

Y1 - 1994/12

N2 - We report tunneling measurements of the superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8 using break junctions. The differential conductance dl/dV at T = 4.2 K shows no leakage around zero bias, while the gap edge peaks in dl/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi2Sr2CaCu2O8 is larger than that in YBa2Cu3O7.

AB - We report tunneling measurements of the superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8 using break junctions. The differential conductance dl/dV at T = 4.2 K shows no leakage around zero bias, while the gap edge peaks in dl/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi2Sr2CaCu2O8 is larger than that in YBa2Cu3O7.

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JO - Physica C: Superconductivity and its Applications

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SN - 0921-4534

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Superconducting energy gaps in YBa₂Cu₃O₇ and Bi₂Sr₂CaCu₂O₈

Abstract

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