Superconductivity in kagome metal YRu3Si2 with strong electron correlations
Chunsheng Gong, Shangjie Tian, Zhijun Tu, Qiangwei Yin, Yang Fu, Ruitao Luo, and Hechang Lei
TL;DR
This paper investigates the superconducting properties of YRu3Si2 with a kagome lattice, revealing it as a type-II superconductor with strong electron correlations possibly linked to flat band features.
Contribution
It provides detailed physical characterization of YRu3Si2, highlighting its superconductivity and strong electron correlation effects related to the kagome lattice structure.
Findings
YRu3Si2 is a type-II bulk superconductor with Tc ~ 3.0 K.
Superconductivity likely originates from weak or moderate electron-phonon coupling.
Strong electron correlations are indicated by large Kadawaki-Woods and Wilson ratios.
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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