Optical study on intermediate-valence compounds Yb1-xLuxAl3

doi:10.1088/1674-1056/27/1/017803

中国物理B ›› 2018, Vol. 27 ›› Issue (1): 17803-017803.doi: 10.1088/1674-1056/27/1/017803

• SPECIAL TOPIC—Non-equilibrium phenomena in soft matters • 上一篇下一篇

Optical study on intermediate-valence compounds Yb_1-xLu_xAl₃

J L Lv(吕佳林), J L Luo(雒建林), N L Wang(王楠林)

1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China;
4 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China

收稿日期:2017-11-22 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: N L Wang E-mail:nlwang@pku.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11327806 and GZ1123) and the National Key Research and Development Program of China (Grant Nos. 2016YFA0300902 and 2017YFA0302904).

Optical study on intermediate-valence compounds Yb_1-xLu_xAl₃

J L Lv(吕佳林)^1,2, J L Luo(雒建林)^1,2,3, N L Wang(王楠林)^3,4

1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
3 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China;
4 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China

Received:2017-11-22 Online:2018-01-05 Published:2018-01-05
Contact: N L Wang E-mail:nlwang@pku.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11327806 and GZ1123) and the National Key Research and Development Program of China (Grant Nos. 2016YFA0300902 and 2017YFA0302904).

摘要/Abstract

摘要：

We report an optical spectroscopy study on intermediate valence system Yb_1-xLu_xAl₃ with x=0, 0.25, 0.5, 0.75, and 1. The Kondo temperature in the system is known to increase with increasing Lu concentration. Therefore, it is expected that the energy scale of the hybridization gap should increase with increasing Lu concentration based on the periodic Anderson model. On the contrary, we find that the spectral structure associated with the hybridization effect shifts monotonically to lower energy. Furthermore, the Lu substitution results in a substantial increase of the free carrier spectral weight and less pronounced plasma frequency reduction upon lowering temperature. We attribute the effect to the disruption of the Kondo lattice periodicity by the random substitution of Yb by Lu. The work highlights the importance of the lattice periodicity of the rare earth element for understanding the Kondo lattice phenomena.

关键词: heavy fermions, intermediate valence system, optical conductivity, hybridization effect

Abstract:

Key words: heavy fermions, intermediate valence system, optical conductivity, hybridization effect

中图分类号: (Optical properties of bulk materials and thin films)

78.20.-e

71.27.+a (Strongly correlated electron systems; heavy fermions) 75.30.Mb (Valence fluctuation, Kondo lattice, and heavy-fermion phenomena)

吕佳林, 雒建林, 王楠林. Optical study on intermediate-valence compounds Yb_1-xLu_xAl₃[J]. 中国物理B, 2018, 27(1): 17803-017803.

J L Lv(吕佳林), J L Luo(雒建林), N L Wang(王楠林). Optical study on intermediate-valence compounds Yb_1-xLu_xAl₃[J]. Chin. Phys. B, 2018, 27(1): 17803-017803.

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Optical study on intermediate-valence compounds Yb_1-xLu_xAl₃

Optical study on intermediate-valence compounds Yb_1-xLu_xAl₃

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