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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