Superconductivity in Kagome Metal YRu_3Si_2 with Strong Electron Correlations

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

doi:10.1088/0256-307X/39/8/087401

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Superconductivity in Kagome Metal YRu $_{3}$ Si $_{2}$ with Strong Electron Correlations

Laboratory for Neutron Scattering, and Beijing Key Laboratory of Optoelectronic Functional Materials & MicroNano Devices, Department of Physics, Renmin University of China, Beijing 100872, China

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Received Date: June 01, 2022

Published Date: July 31, 2022

Abstract

Abstract

We report the detailed physical properties of YRu $_{3}$ Si $_{2}$ with the Ru kagome lattice at normal and superconducting states. The results of resistivity and magnetization show that YRu $_{3}$ Si $_{2}$ is a type-II bulk superconductor with $T_{\rm c}\sim 3.0$ 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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Superconductivity in Kagome Metal YRu $_{3}$ Si $_{2}$ with Strong Electron Correlations

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Superconductivity in Kagome Metal YRu3_{3}Si2_{2} with Strong Electron Correlations

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Superconductivity in Kagome Metal YRu $_{3}$ Si $_{2}$ with Strong Electron Correlations