Fourfold symmetry in the ab plane of the upper critical field for single-crystal Pb2Sr2Y0.62Ca0.38Cu3O8: Evidence for d(x2-y2) pairing in a high-T-c superconductor

被引：30

作者：

Koike, Y ^{[1
]}

Takabayashi, T ^{[1
]}

Noji, T ^{[1
]}

Nishizaki, T ^{[1
]}

Kobayashi, N ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,AOBA KU,SENDAI,MIYAGI 98077,JAPAN

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.54.R776

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have found clear anisotropy in the ab plane with fourfold symmetry of the upper critical field for single-crystal Pb2Sr2Y0.62Ca0.38Cu3O8, which is very similar to that formerly observed in La1.86Sr0.14CuO4 [Physica B 165&166, 1449 (1990)]. This is neither attributed to the twin structure in the orthorhombic phase nor to the anisotropy of the Fermi surface but is explained as being mainly due to the anisotropy of the superconducting energy gap owing to d(x2-y2) pairing, which supports d(x2-y2) pairing in a high-T-c superconductor.

引用

页码：R776 / R779

页数：4

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