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arXiv · 1512.03575

Charge Carrier Dynamics of the Heavy Fermion Metal CeCoIn$_5$ Probed by THz Spectroscopy

Uwe S. Pracht·Julian Simmendinger·Martin Dressel·Ryota Endo·Tatsuya Watashige·Yousuke Hanaoka·Masaaki Shimozawa·Takahito Terashima·Takasada Shibauchi·Yuji Matsuda·Marc Scheffler
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Abstract

We discuss the charge carrier dynamics of the heavy-fermion compound CeCoIn$_5$ in the metallic regime measured by means of quasi-optical THz spectroscopy. The transmittance of electromagnetic radiation through a CeCoIn$_5$ thin film on a dielectric substrate is analyzed in the single-particle Drude framework. We discuss the temperature dependence of the electronic properties, such as the scattering time and dc-conductivity and compare with transport measurements of the sheet resistance. Towards low temperatures, we find an increasing mismatch between the results from transport and Drude-analyzed optical measurements and a growing incapability of the simple single-particle picture describing the charge dynamics, likely caused by the evolving heavy-fermion nature of the correlated electron system.

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Uwe S. Pracht, Julian Simmendinger, Martin Dressel, Ryota Endo, Tatsuya Watashige, Yousuke Hanaoka, Masaaki Shimozawa, Takahito Terashima, Takasada Shibauchi, Yuji Matsuda, Marc Scheffler. 2015-12-11. Charge Carrier Dynamics of the Heavy Fermion Metal CeCoIn$_5$ Probed by THz Spectroscopy. https://doi.org/10.1016/j.jmmm.2015.08.117

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