Multiple-Structure Optical Spectral Weight Transfer in Ferromagnetic EuB6

被引：3

作者：

Kim, JungHo ^{[1
]}

Jung, SungHoon ^{[2
]}

Choi, E. J. ^{[2
]}

机构：

[1] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[2] Univ Seoul, Dept Phys, Seoul 130743, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2008年 / 53卷 / 06期

关键词：

Infrared conductivity; Optical sum rule; Ferromagnetic transition;

D O I：

10.3938/jkps.53.3385

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have obtained the optical conductivity of EuB6 over a wide range from 2 meV to 5.5 eV from reflectivity and ellipsometry measurements. At the ferromagnetic transition (T-c = 15.5 K) (1) sigma(1)(omega) was found to decrease at three different energies w = 0.5, 1.4 and 2.75 eV and (2) the lost spectral weight was found to be recovered in the Drude conductivity. We show that these unusual multiple-structure optical conductivity changes can be explained by using the spin-dependent splitting of the electronic bands at the ferromagnetic phase.

引用

收藏

页码：3385 / 3389

页数：5

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