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arXiv · 1009.2432

Enhanced quasiparticle heat conduction of the multigap superconductor Lu2Fe3Si5

Y. Machida·S. Sakai·K. Izawa·H. Okuyama·T. Watanabe
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Abstract

The thermal transport measurements have been made on the Fe-based superconductor Lu2Fe3Si5 (Tc ~ 6 K) down to a very low temperature Tc/120. The field and temperature dependences of the thermal conductivity confirm the multigap superconductivity with fully opened gaps on the whole Fermi surfaces. In comparison to MgB2 as a typical example of the multigap superconductor in a p-electron system, Lu2Fe3Si5 reveals a remarkably enhanced quasiparticle heat conduction in the mixed state. The results can be interpreted as a consequence of the electronic correlations derived from Fe 3d-electrons.

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Y. Machida, S. Sakai, K. Izawa, H. Okuyama, T. Watanabe. 2010-09-13. Enhanced quasiparticle heat conduction of the multigap superconductor Lu2Fe3Si5. https://doi.org/10.1103/physrevlett.106.107002

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