Low energy electrodynamics and a hidden Fermi liquid in the heavy-fermion CeCoIn${}_5$

L. Y. Shi, Zhenisbek Tagay, Jiahao Liang +6

We present time-domain THz spectroscopy of thin films of the heavy-fermion superconductor CeCoIn${}_5$. Below the $\approx$ 40 K Kondo coherence temperature, a narrow Drude-like peak…