Low energy electrodynamics and a hidden Fermi liquid in the heavy-fermion CeCoIn\(_5\)
We present time-domain THz spectroscopy of thin films of the heavy-fermion superconductor CeCoIn\(_5\). The complex optical conductivity is analyzed through a Drude model and extended Drude model analysis. Below the \(\approx\) 40 K Kondo coherence temperature, a narrow Drude-like peak forms, as the...
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| creator | Shi, L Y Tagay, Zhenisbek Liang, Jiahao Duong, Khoan Wu, Yi Ronning, F Schlom, Darrell G Shen, Kyle Armitage, N P |
| description | We present time-domain THz spectroscopy of thin films of the heavy-fermion superconductor CeCoIn\(_5\). The complex optical conductivity is analyzed through a Drude model and extended Drude model analysis. Below the \(\approx\) 40 K Kondo coherence temperature, a narrow Drude-like peak forms, as the result of the \(f\) orbital - conduction electron hybridization and the formation of the heavy-fermion state. Via an extended Drude model analysis, we measure the frequency-dependent scattering rate (\(1/ \tau \)) and effective mass (\(m^*/m_b\)). This scattering rate shows a linear dependence on temperature, which matches the dependence of the resistivity as expected. Nonetheless, the width of the low-frequency Drude peak (characterized by a {\it renormalized} quasiparticle scattering rate (\(1 / \tau^* = m_b/ m^* \tau \)) does show a \(T^2\) dependence giving evidence for a hidden Fermi state. |
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The complex optical conductivity is analyzed through a Drude model and extended Drude model analysis. Below the \(\approx\) 40 K Kondo coherence temperature, a narrow Drude-like peak forms, as the result of the \(f\) orbital - conduction electron hybridization and the formation of the heavy-fermion state. Via an extended Drude model analysis, we measure the frequency-dependent scattering rate (\(1/ \tau \)) and effective mass (\(m^*/m_b\)). This scattering rate shows a linear dependence on temperature, which matches the dependence of the resistivity as expected. Nonetheless, the width of the low-frequency Drude peak (characterized by a {\it renormalized} quasiparticle scattering rate (\(1 / \tau^* = m_b/ m^* \tau \)) does show a \(T^2\) dependence giving evidence for a hidden Fermi state.</description><identifier>EISSN: 2331-8422</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Conduction electrons ; Electrodynamics ; Elementary excitations ; Fermi liquids ; Fermions ; Heavy fermion superconductors ; Scattering ; Temperature dependence ; Thin films</subject><ispartof>arXiv.org, 2023-10</ispartof><rights>2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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| subjects | Conduction electrons Electrodynamics Elementary excitations Fermi liquids Fermions Heavy fermion superconductors Scattering Temperature dependence Thin films |
| title | Low energy electrodynamics and a hidden Fermi liquid in the heavy-fermion CeCoIn\(_5\) |
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