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arXiv · 2109.11478

Superconductivity in kagome metal YRu3Si2 with strong electron correlations

Chunsheng Gong·Shangjie Tian·Zhijun Tu·Qiangwei Yin·Yang Fu·Ruitao Luo·Hechang Lei
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Abstract

We report the detailed physical properties of YRu3Si2 with the Ru kagome lattice at normal and superconducting states. The results of resistivity and magnetization show that YRu3Si2 is a type-II bulk superconductor with Tc ~ 3.0 K. The specific heat measurement further suggests that this superconductivity could originate from the weak or moderate electron-phonon coupling. On the other hand, both large Kadawaki-Woods ratio and Wilson ratio indicate that there is a strong electron correlation effect in this system, which may have a connection with the featured flat band of kagome lattice.

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Chunsheng Gong, Shangjie Tian, Zhijun Tu, Qiangwei Yin, Yang Fu, Ruitao Luo, Hechang Lei. 2021-09-23. Superconductivity in kagome metal YRu3Si2 with strong electron correlations. https://doi.org/10.1088/0256-307x%2F39%2F8%2F087401

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