Superconductivity in Kagome Metal YRu<sub>3</sub>Si<sub>2</sub> with Strong Electron Correlations
Chunsheng Gong, Shangjie Tian, Zhijun Tu, Qiangwei Yin, Yang Fu, Ruitao Luo, Hechang Lei
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 c ∼ 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.
Topics & Concepts
SuperconductivityCondensed matter physicsElectronMetalMaterials sciencePhysicsNuclear physicsMetallurgyAdvanced Condensed Matter PhysicsTopological Materials and PhenomenaRare-earth and actinide compounds