Superconductivity in Kagome Metal YRu_(3)Si_(2)with Strong Electron Correlations  

作　　者：Chunsheng Gong Shangjie Tian Zhijun Tu Qiangwei Yin Yang Fu Ruitao Luo Hechang Lei 龚春生;田尚杰;涂志俊;殷蔷薇;付阳;罗睿韬;雷和畅(Laboratory for Neutron Scattering,and Beijing Key Laboratory of Optoelectronic Functional Materials&MicroNano Devices,Department of Physics,Renmin University of China,Beijing 100872,China)

机构地区：[1]Laboratory for Neutron Scattering,and Beijing Key Laboratory of Optoelectronic Functional Materials&MicroNano Devices,Department of Physics,Renmin University of China,Beijing 100872,China

出　　处：《Chinese Physics Letters》2022年第8期59-64,共6页中国物理快报（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2018YFE0202600);the Beijing Natural Science Foundation(Grant No.Z200005);the Fundamental Research Funds for the Central Universities and Research Funds of Renmin University of China(RUC)(Grant Nos.18XNLG14,19XNLG13,19XNLG17,and 22XNKJ40);the Beijing National Laboratory for Condensed Matter Physics。

摘　　要：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.

关 键 词：STRONG (3) ELECTRON 

分 类 号：O469[理学—凝聚态物理]