Phase-sensitive evidence for d-wave pairing symmetry in electron-doped cuprate superconductors

被引：267
|
作者：
Tsuei, CC [1 ]
Kirtley, JR [1 ]
机构：
[1] IBM Corp, Thomas J Watson Res Ctr, Yorktown Heights, NY 10598 USA
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.85.182
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present phase-sensitive evidence that the electron-doped cuprates Nd1.85Ce0.15CuO4-y (NCCO) and Pr1.85Ce0.15CuO4-y (PCCO) have d-wave pairing symmetry. This evidence was obtained by observing the half-flux quantum effect, using a scanning SQUID microscope, in c-axis-oriented films of NCCO or PCCO epitaxially grown on tricrystal [100] SrTiO3 substrates designed to be frustrated for a d(x2-y2) order parameter. Samples with two other configurations, designed to be unfrustrated for a d-wave superconductor, do not show the half-flux quantum effect.
引用
收藏
页码：182 / 185
页数：4
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