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

被引：268

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

页码：182 / 185

页数：4

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