Weak-coupling Bardeen-Cooper-Schrieffer superconductivity in the electron-doped cuprate superconductors

被引：32

作者：

Shan, L. ^{[1
]}

Huang, Y. ^{[1
]}

Wang, Y. L. ^{[1
]}

Li, Shiliang ^{[2
,3
]}

Zhao, Jun ^{[2
,3
]}

Dai, Pengcheng ^{[2
,3
,4
]}

Zhang, Y. Z. ^{[1
]}

Ren, C. ^{[1
]}

Wen, H. H. ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Lab Superconduct, Inst Phys, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

[3] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[4] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.77.014526

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use in-plane tunneling spectroscopy to study the temperature dependence of the local superconducting gap Delta(T) in electron-doped copper oxides with various T-c's and Ce-doping concentrations. We show that the temperature dependence of Delta(T) follows the expectation of the Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity, where Delta(0)/k(B)T(c)approximate to 1.72 +/- 0.15 and Delta(0) is the average superconducting gap across the Fermi surface, for all the doping levels investigated. These results suggest that the electron-doped superconducting copper oxides are weak-coupling BCS superconductors.

引用

页数：5

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