Superconductivity and Normal-State Properties of Kagome Metal RbV$_{3}$Sb$_{5}$ Single Crystals
Qiangwei Yin†, Zhijun Tu†, Chunsheng Gong†, Yang Fu , Shaohua Yan , and Hechang Lei*
Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
Abstract：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 $T_{\rm c}\sim 0.92$ K. Meanwhile, resistivity, magnetization and heat capacity measurements indicate that it exhibits anomalies of properties at $T^{*}\sim 102$–103 K, possibly related to the formation of charge ordering state. When $T$ is lower than $T^{*}$, the Hall coefficient $R_{\rm H}$ 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.
. [J]. 中国物理快报, 2021, 38(3): 37403-.
Qiangwei Yin, Zhijun Tu, Chunsheng Gong, Yang Fu , Shaohua Yan , and Hechang Lei. Superconductivity and Normal-State Properties of Kagome Metal RbV$_{3}$Sb$_{5}$ Single Crystals. Chin. Phys. Lett., 2021, 38(3): 37403-.
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2021, Vol. 38 
