EVIDENCE FOR RAPID SUPPRESSION OF QUASI-PARTICLE SCATTERING BELOW T(C) IN YBA2CU3O7-DELTA

被引：345

作者：

BONN, DA

DOSANJH, P

LIANG, R

HARDY, WN

机构：

[1] Department of Physics, University of British Columbia, Vancouver

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.68.2390

中图分类号：

O4 [物理学];

学科分类号：

0702 [物理学];

摘要：

The microwave surface resistance at 2.95 GHz of a very-high-quality crystal of YBa2Cu3O7 exhibits unusual nonmonotonic temperature dependence. After a sharp drop below T(c) by a factor of 5000 the loss rises to a peak at 35 K and then falls at lower temperature. The peak is due to a rapid decrease in the scattering of thermally activated quasiparticles below T(c) and this suppression of scattering suggests that the excitations responsible for the large resistivity of YBa2Cu3O7 are gapped below T(c). A technological implication is that disorder may lower the microwave loss.

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页码：2390 / 2393

页数：4

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