Optical study of charge dynamics in CaCo2As2

doi:10.1088/1674-1056/25/5/057201

中国物理B ›› 2016, Vol. 25 ›› Issue (5): 57201-057201.doi: 10.1088/1674-1056/25/5/057201

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Optical study of charge dynamics in CaCo₂As₂

Wei Zhang(张威), Bing Xu(许兵), Run Yang(杨润), Jin-Yun Liu(刘金云), Hao Yang(杨浩), Xiang-Gang Qiu(邱祥冈)

1. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow university, Suzhou 215006, China;
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

收稿日期:2016-01-31 修回日期:2016-02-25 出版日期:2016-05-05 发布日期:2016-05-05
通讯作者: Hao Yang, Xiang-Gang Qiu E-mail:yanghao@nuaa.edu.cn;xgqiu@iphy.ac.cn
基金资助:
Project supported by the National Basic Research Program of China (Grant Nos. 2012CB821400, 2012CB921302, and 2015CB921303) and the National Natural Science Foundation of China (Grants Nos. 11274237, 91121004, 51228201, and 11004238). Wei Zhang also thanks the support of the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Optical study of charge dynamics in CaCo₂As₂

Wei Zhang(张威)^1,2, Bing Xu(许兵)², Run Yang(杨润)², Jin-Yun Liu(刘金云)², Hao Yang(杨浩)³, Xiang-Gang Qiu(邱祥冈)²

1. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow university, Suzhou 215006, China;
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3. College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Received:2016-01-31 Revised:2016-02-25 Online:2016-05-05 Published:2016-05-05
Contact: Hao Yang, Xiang-Gang Qiu E-mail:yanghao@nuaa.edu.cn;xgqiu@iphy.ac.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant Nos. 2012CB821400, 2012CB921302, and 2015CB921303) and the National Natural Science Foundation of China (Grants Nos. 11274237, 91121004, 51228201, and 11004238). Wei Zhang also thanks the support of the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

摘要/Abstract

摘要：

We present an infrared spectroscopy study of charge dynamics in CaCo₂As₂ single crystal. In this material, the optical conductivity can be described by two Drude components with different scattering rates (1/τ): a broad incoherent background and a narrow Drude component. By monitoring the temperature dependence, we find that only the narrow Drude component is temperature-dependent and determines the transport properties. Especially a Fermi liquid behavior of carriers is revealed by the T² behavior in the dc resistivity ρ_n and scattering rate 1/τ_n, indicating a coherent nature of quasiparticles in the narrow Drude subsystem.

关键词: infrared spectroscopy, optical conductivity, Fermi liquid

Abstract:

Key words: infrared spectroscopy, optical conductivity, Fermi liquid

中图分类号: (Electronic conduction in metals and alloys)

72.15.-v

74.70.-b (Superconducting materials other than cuprates) 78.30.-j (Infrared and Raman spectra)

张威, 许兵, 杨润, 刘金云, 杨浩, 邱祥冈. Optical study of charge dynamics in CaCo₂As₂[J]. 中国物理B, 2016, 25(5): 57201-057201.

Wei Zhang(张威), Bing Xu(许兵), Run Yang(杨润), Jin-Yun Liu(刘金云), Hao Yang(杨浩), Xiang-Gang Qiu(邱祥冈). Optical study of charge dynamics in CaCo₂As₂[J]. Chin. Phys. B, 2016, 25(5): 57201-057201.

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Optical study of charge dynamics in CaCo₂As₂

Optical study of charge dynamics in CaCo₂As₂

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