【摘 要】
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We present an infrared spectroscopy study of charge dynamics in CaCo_2As_2 single crystal. In this material, the optical conductivity can be described by two Dr
【机 构】
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College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Scie
【出 处】
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Chinese Physics B
论文部分内容阅读
We present an infrared spectroscopy study of charge dynamics in CaCo_2As_2 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 T~2 behavior in the dc resistivity ρ_n and scattering rate 1/τ_n, indicating a coherent nature of quasiparticles in the narrow Drude subsystem.
We present an infrared spectroscopy study of charge dynamics in CaCo_2As_2 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 that the narrow Drude component is temperature-dependent and determines the transport properties. Especially a Fermi liquid behavior of carriers is revealed by the T ~ 2 behavior in the dc resistivity p_n and the scattering rate 1 / a coherent nature of quasiparticles in the narrow Drude subsystem.
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