INPLANE AND (C)OVER-CAP-AXIS MICROWAVE PENETRATION DEPTH OF BI2SR2CA1CU2O8+DELTA CRYSTALS

被引：196
作者：
JACOBS, T
SRIDHAR, S
LI, Q
GU, GD
KOSHIZUKA, N
机构：
[1] BROOKHAVEN NATL LAB,DIV MAT SCI,UPTON,NY 11973
[2] ISTEC,SUPERCONDUCT RES LAB,KATO KU,10-13,TOKYO 135,JAPAN
来源：
PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 24期
关键词：
D O I：
10.1103/PhysRevLett.75.4516
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The complete temperature dependences of the in-plane and (c) over cap-axis microwave (10 GHz) penetration depth lambda(T) and the surface resistance R(s)(T) of high quality Bi2Sr2Ca1Cu2O8+delta crystals are reported. In contrast to earlier measurements, a leading lambda(ab) proportional to T dependence is observed at low temperatures, consistent with nodes in the in-plane gap. The overall behavior of lambda(ab)(T) and R(s ab)(T) is similar to that of YBa2Cu3Oy at low T, but differs at temperatures near T-c. The (c) over cap-axis penetration depth lambda(c)(T) is shown to best agree with a model of weakly coupled superconducting layers with nodes in the gap.
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页码：4516 / 4519
页数：4
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