Pressure-induced reemergence of superconductivity in the topological kagome metal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Cs</mml:mi><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Zhuyi Zhang, Zheng Chen, Ying Zhou, Yifang Yuan, Shuyang Wang, Jing Wang, Haiyang Yang, Chao An, Lili Zhang, Xiangde Zhu, Yonghui Zhou, Xuliang Chen, Jianhui Zhou, Zhaorong Yang
Abstract
The quasi-two-dimensional kagome superconductors $A$V${}_{3}$Sb${}_{5}$ ($A$ $=$ K, Rb, and Cs) have attracted great interest due to various exotic quantum phenomena, such as topological charge density waves and the giant anomalous Hall effect. Here, the authors find two-dome unconventional superconductivity in CsV${}_{3}$Sb${}_{5}$ under high pressure. They also confirm the absence of a structural phase transition up to 43.1 GPa through high-pressure synchrotron x-ray diffraction measurements, suggesting that the novel reemergent superconductivity dome can be attributed to the Fermi surface reconstruction caused by the Lifshitz transition.