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

12 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

Access to Document

10.1016/0921-4534(94)92171-7

Fingerprint Dive into the research topics of 'Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8'. Together they form a unique fingerprint.

Cite this

@article{841c9323ebda4fdba6983fbf874afd39,

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.",

author = "T. Ekino and T. Minami and H. Fujii and J. Akimitsu",

year = "1994",

month = dec,

doi = "10.1016/0921-4534(94)92171-7",

language = "English",

volume = "235-240",

pages = "1899--1900",

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

issn = "0921-4534",

publisher = "Elsevier",

number = "PART 3",

}

TY - JOUR

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.

UR - http://www.scopus.com/inward/record.url?scp=0342329091&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0342329091&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(94)92171-7

DO - 10.1016/0921-4534(94)92171-7

M3 - Article

AN - SCOPUS:0342329091

VL - 235-240

SP - 1899

EP - 1900

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - PART 3

ER -

Superconducting energy gaps in YBa₂Cu₃O₇ and Bi₂Sr₂CaCu₂O₈

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint Dive into the research topics of 'Superconducting energy gaps in YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> and Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub>'. Together they form a unique fingerprint.

Cite this