Superconductivity and Normal-State Properties of Kagome Metal RbV3Sb5 Single Crystals

被引：328

作者：

Yin, Qiangwei

Tu, Zhijun

Gong, Chunsheng

Fu, Yang

Yan, Shaohua

Lei, Hechang ^{[1
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2021年 / 38卷 / 03期

基金：

中国国家自然科学基金; 国家重点研发计划; 北京市自然科学基金;

关键词：

TRANSITION-TEMPERATURE; FERMIONS;

D O I：

10.1088/0256-307X/38/3/037403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the discovery of superconductivity and detailed normal-state physical properties of RbV3Sb5 single crystals with V kagome lattice. RbV3Sb5 single crystals show a superconducting transition at T-c similar to 0.92 K. Meanwhile, resistivity, magnetization and heat capacity measurements indicate that it exhibits anomalies of properties at T* similar to 102-103 K, possibly related to the formation of charge ordering state. When T is lower than T*, the Hall coefficient R-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.

引用

页数：6

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