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We report on the infrared spectroscopic studies of the normal-state electronic response of rare-earth ternary platinum germanide superconductor La2Pt3Ge5. We analyzed the temperature-dependent optical conductivity spectra using the Drude-Lorentz oscillator model. We found that the two Drude responses with distinct scattering rates are required to explain the charge dynamics at 10 K while a single Drude mode could reproduce the far-infrared conductivity at higher temperatures. Our results indicated the two-band character of the electronic structure and highlighted the disparate temperature evolution of the electrodynamics of the two electronic states.
S. J. Song [ Department of Physics, Hanyang University, Seoul, Korea ]
N. H. Sung [ School of Materials Science and Applied Physics, Gwangju Institute of Science and Technology, Gwangju, Korea ]
B. K. Cho [ School of Materials Science and Applied Physics, Gwangju Institute of Science and Technology, Gwangju, Korea, Department of Photonics and Applied Physics, Gwangju Institute of Science and Technology, Gwangju, Korea ]
S. J. Moon [ Department of Physics, Hanyang University, Seoul, Korea ]
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