Superfluid Density and Angular Dependence of the Energy Gap in Optimally Doped (BiPb)2(SrLa)2CuO6+δ

被引：0

作者：

Straessle, S. ^{[1
]}

Khasanov, R. ^{[2
]}

Kondo, T. ^{[3
,4
,5
]}

Heron, D. O. G. ^{[6
]}

Kaminski, A. ^{[3
,4
]}

Keller, H. ^{[1
]}

Lee, S. L. ^{[6
]}

Takeuchi, T. ^{[5
,7
]}

机构：

[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[2] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[3] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[4] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[5] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan

[6] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[7] Nagoya Univ, EcoTopia Sci Inst, Nagoya, Aichi 4648603, Japan

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2009年 / 22卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

Muon-spin rotation experiments; Cuprates; Suppressed superfluid density; Superconducting gap; Pseudogap; VORTEX STATE; PENETRATION DEPTH;

D O I：

10.1007/s10948-008-0395-z

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present a muon-spin rotation study of the optimally doped cuprate superconductor (BiPb)(2)(SrLa)(2) CuO6+delta . The measured magnetic field dependence of the in-plane magnetic penetration lambda (ab) suggests superconductivity with a dominant d-wave order parameter. The comparison of the temperature dependence of lambda (ab) with calculations, assuming the angular gap symmetry as obtained from photoemission measurements, is consistent with a partial suppression of the quasi-particle weight towards the anti-nodal region of the Fermi surface. This suggests that the superconducting and the pseudogap state are dominated by different parts of the Fermi surface.

引用

页码：189 / 193

页数：5

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