Superconducting gap anisotropy vs doping level in high-T-c cuprates

被引：104

作者：

Kendziora, C ^{[1
]}

Kelley, RJ ^{[1
]}

Onellion, M ^{[1
]}

机构：

[1] UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.77.727

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the results of electronic Raman scattering in Bi2Sr2CaCu2O8+delta (Bi2212) and Tl2Ba2CuO6+delta (Tl2201) high-T-c superconductors with variations in the oxygen content. Near optimal doping, both materials show gap anisotropy, with 2 Delta/k(B)T(c) values of 7.2 (B-1g) vs 5.8 (A(1g)) in Tl2201 and 8.5 (B-1g) vs 6.2 (A(1g)) in Bi2212. Kowever, overdoped samples exhibit a symmetry independent gap with 2 Delta/k(B)T(c) ranging from 5.2 for Bi2212 (T-c = 57 K) to 3.9 in Tl2201 (T-c = 37 K). We compare the data with calculations using both isotropic s-wave and d-wave order parameters.

引用

页码：727 / 730

页数：4

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