Charge Density Wave Orders and Enhanced Superconductivity under Pressure in the Kagome Metal CsV3Sb5

被引：80

作者：

Wang, Qi ^{[1
,2
]}

Kong, Pengfei ^{[1
]}

Shi, Wujun ^{[1
,3
,4
]}

Pei, Cuiying ^{[1
]}

Wen, Chenhaoping ^{[1
]}

Gao, Lingling ^{[1
]}

Zhao, Yi ^{[1
]}

Yin, Qiangwei ^{[5
,6
]}

Wu, Yueshen ^{[1
]}

Li, Gang ^{[1
,2
]}

Lei, Hechang ^{[5
,6
]}

Li, Jun ^{[1
,2
]}

Chen, Yulin ^{[1
,2
,7
]}

Yan, Shichao ^{[1
,2
]}

Qi, Yanpeng ^{[1
]}

机构：

[1] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[2] ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China

[3] ShanghaiTech Univ, Ctr Transformat Sci, Shanghai 201210, Peoples R China

[4] ShanghaiTech Univ, Shanghai High Repetit Rate XFEL & Extreme Light F, Shanghai 201210, Peoples R China

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

[6] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

[7] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

来源：

ADVANCED MATERIALS | 2021年 / 33卷 / 42期

基金：

上海市自然科学基金; 中国博士后科学基金; 国家重点研发计划; 中国国家自然科学基金; 北京市自然科学基金;

关键词：

kagome lattice; charge density wave; high pressure; superconductivity; STATE;

D O I：

10.1002/adma.202102813

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Superconductivity in topological kagome metals has recently received great research interests. Here, charge density wave (CDW) orders and the evolution of superconductivity under various pressures in CsV3Sb5 single crystal with V kagome lattice are investigated. By using high-resolution scanning tunneling microscopy/spectroscopy (STM/STS), two CDW orders in CsV3Sb5 are observed which correspond to 4a x 1a and 2a x 2a superlattices. By applying pressure, the superconducting transition temperature T-c is significantly enhanced and reaches a maximum value of 8.2 K at around 1 GPa. Accordingly, CDW state is gradually declined as increasing the pressure, which indicates the competing interplay between CDW and superconducting state in this material. The broad superconducting transitions around 0.4-0.8 GPa can be related to the strong competition relation among two CDW states and superconductivity. These results demonstrate that CsV3Sb5 is a new platform for exploring the interplay between superconductivity and CDW in topological kagome metals.

引用

页数：6

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