Experimental evidence for two gaps in the high-temperature La1.83Sr0.17CuO4 superconductor

被引：137
作者：
Khasanov, R.
Shengelaya, A.
Maisuradze, A.
La Mattina, F.
Bussmann-Holder, A.
Keller, H.
Mueller, K. A.
机构：
[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland
[2] Tbilisi State Univ, Inst Phys, GE-0128 Tbilisi, Georgia
[3] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 05期
关键词：
D O I：
10.1103/PhysRevLett.98.057007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The in-plane magnetic field penetration depth (lambda(ab)) in single-crystal La1.83Sr0.17CuO4 was investigated by muon-spin rotation (mu SR). The temperature dependence of lambda(-2)(ab) has an inflection point around 10-15 K , suggesting the presence of two superconducting gaps: a large gap (Delta(d)(1)) with d-wave and a small gap (Delta(s)(2)) with s-wave symmetry. The zero-temperature values of the gaps at mu H-0 = 0.02 T were found to be Delta(d)(1)(0) = 8.2(1) meV and Delta(s)(2)(0) = 1.57(8) meV.
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页数：4
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