Far-infrared optical investigation of the heavy-fermion semiconductor U2Ru2Sn

被引：2
|
作者：
Sichelschmidt, J. [1 ]
Voevodin, V.
Mydosh, J. A.
Steglich, F.
机构：
[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
[2] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期
关键词：
Kondo insulator; optical pseudo-gap; U2Ru2Sn;
D O I：
10.1016/j.jmmm.2006.10.290
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present far-infrared optical properties of the heavy-fermion semiconductor U2Ru2Sn. The optical reflectivity in the tetragonal plane shows a pronounced suppression at energies below 60 meV and temperatures below 200 K. These optical properties are similar to those reported for canonical heavy-fermion semiconductors. Narrow phonon-like peaks are observed at unusually high reflectivity values. We interpret the data within a temperature dependent, partial opening of a gap (or "pseudo-gap'') in the quasi-particle excitation spectrum. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：434 / 436
页数：3
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