Superconductivity and Normal-State Properties of Kagome Metal RbV_(3)Sb_(5) Single Crystals  

作　　者：Qiangwei Yin Zhijun Tu Chunsheng Gong Yang Fu Shaohua Yan Hechang Lei 殷蔷薇;涂志俊;龚春生;付阳;闫少华;雷和畅(Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872,China)

机构地区：[1]Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices,Renmin University of China,Beijing 100872,China

出　　处：《Chinese Physics Letters》2021年第3期95-100,共6页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11822412 and 11774423);the National Key R&D Program of China(Grant Nos.2018YFE0202600 and 2016YFA0300504);the Beijing Natural Science Foundation(Grant No.Z200005);the Fundamental Research Funds for the Central Universities;the Research Funds of Renmin University of China(RUC)(Grant Nos.18XNLG14 and 19XNLG17);the Beijing National Laboratory for Condensed Matter Physics。

摘　　要：We report the discovery of superconductivity and detailed normal-state physical properties of RbV_(3)Sb_(5) single crystals with V kagome lattice.RbV_(3)Sb_(5) single crystals show a superconducting transition at Tc~0.92 K.Meanwhile,resistivity,magnetization and heat capacity measurements indicate that it exhibits anomalies of properties at T*~102-103 K,possibly related to the formation of charge ordering state.When T is lower than T*,the Hall coefficient RH undergoes a drastic change and sign reversal from negative to positive,which can be partially explained by the enhanced mobility of hole-type carriers.In addition,the results of quantum oscillations show that there are some very small Fermi surfaces with low effective mass,consistent with the existence of multiple highly dispersive Dirac band near the Fermi energy level.

关 键 词：state. FERMI MAGNETIZATION 

分 类 号：O469[理学—凝聚态物理]