OBSERVATION OF A-B PLANE GAP ANISOTROPY IN BI2SR2CACU2O8 WITH A LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPE

被引：83

作者：

KANE, J ^{[1
]}

CHEN, Q ^{[1
]}

NG, KW ^{[1
]}

TAO, HJ ^{[1
]}

机构：

[1] CHINESE ACAD SCI,INST PHYS,BEIJING,PEOPLES R CHINA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.72.128

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Significant gap anisotropy within the a-b plane of Bi2Sr2CaCu2O8 has been observed with a low temperature scanning tunneling microscope. The energy gap is largest along the a-axis direction, with DELTA(p-p) = 36.6 meV and decreases gradually to a value of 23 meV along the direction 45-degrees from the a axis. The tunneling data have been fit well using a simple model which assumes a d-wave-pairing energy gap, and allows tunneling in all directions close to the normal of the surface.

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页码：128 / 131

页数：4

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