Evidence for extreme gap anisotropy in Ho0.1Y0.9Ba2Cu3O7 from neutron spectroscopy of Ho3+

被引：31

作者：

Boothroyd, AT ^{[1
]}

Mukherjee, A ^{[1
]}

Murani, AP ^{[1
]}

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE 9,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.77.1600

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured by neutron spectroscopy the relaxation behavior of the 0.5 meV ground state crystal held transition of Ho3+ in Ho0.1Y0.9Ba2Cu3O7. We studied the intrinsic linewidth Gamma and peak position over the temperature range 1.5-160 K. The data show an anomaly at similar to 115 K consistent with the formation of an energy gap. We extrapolate the normal state linewidth Gamma(n) to lower temperatures, and hence evaluate the reduced relaxation rate Gamma/Gamma(n). Both Gamma/Gamma(n) and the peak position show a significant increase with temperature well below T-c characteristic of a high degree of gap anisotropy.

引用

页码：1600 / 1603

页数：4

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