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http://dx.doi.org/10.9714/psac.2015.17.4.012

Normal-state charge dynamics of ternary platinum germanide superconductor La2Pt3Ge5  

Song, S.J. (Department of Physics, Hanyang University)
Sung, N.H. (School of Materials Science and Applied Physics, Gwangju Institute of Science and Technology)
Cho, B.K. (School of Materials Science and Applied Physics, Gwangju Institute of Science and Technology)
Moon, S.J. (Department of Physics, Hanyang University)
Publication Information
Progress in Superconductivity and Cryogenics / v.17, no.4, 2015 , pp. 12-15 More about this Journal
Abstract
We report on the infrared spectroscopic studies of the normal-state electronic response of rare-earth ternary platinum germanide superconductor $La_2Pt_3Ge_5$. 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.
Keywords
$La_2Pt_3Ge_5$; multiband; infrared spectroscopy; optical conductivity;
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