Charge density wave orders and enhanced superconductivity under pressure in the kagome metal CsV3Sb5
| Autor: | Wang, Qi, Kong, Pengfei, Shi, Wujun, Pei, Cuiying, Wen, Chenhaoping, Gao, Lingling, Zhao, Yi, Yin, Qiangwei, Wu, Yueshen, Li, Gang, Lei, Hechang, Li, Jun, Chen, Yulin, Yan, Shichao, Qi, Yanpeng |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Adv. Mater. 2021, 2102813 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1002/adma.202102813 |
| Popis: | 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 tunnelling microscopy /spectroscopy (STM/STS), two CDW orders in CsV3Sb5 are observed which correspond to 4a*1a and 2a*2a superlattices. By applying pressure, the superconducting transition temperature Tc 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. Comment: 20 pages, 10 figures |
| Databáze: | arXiv |
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