MICROWAVE REFLECTIVITY OF CERU2SI2 - COLLECTIVE EXCITATIONS IN THE ELECTRONIC FERMI-LIQUID

被引：7

作者：

HAMPEL, G

机构：

[1] Physikalisches Institut, J. W. Goethe-Universität, D-60054 Frankfurt am Main

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.72.3386

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present microwave reflectivity data (35-134 GHz) on the magnetically nonordering heavy fermion compound CeRu2Si2. In the Fermi liquid region at fields near to the metamagnetic transition (B(c) congruent-to 8 T) we observe pronounced effects with a reflectivity change of several percent. The experimental features can be explained within an oscillator model in epsilon(omega) and mu(omega). The oscillator frequencies become soft at B(c). The relaxation frequencies GAMMA(epsilon,mu)osc(< omega) are extremely small and point to long lived collective excitations. They are supposed to represent the propagation of a zero sound mode and spin

引用

页码：3386 / 3388

页数：3

共 17 条

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