It is intriguing to explore the coexistence and (or) competition between charge-density-wave (CDW) and superconductivity (SC) in many correlated electron systems, such as cuprates, organic superconductors and dichacolgenides. Among them, the recently discovered Z2 topological kagome metals AV3Sb5 (A=K, Rb, Cs) serve as an ideal platform to study the intricate relation between them. Here, we report the electrical resistance measurements on CsV3Sb5 thin flakes (≈ 60 nm) under hydrostatic pressure up to 2.12 GPa to compare its pressure phase diagram of CDW and SC with its bulk form. Even though the CDW transition temperature (TCDW) in CsV3Sb5 thin flakes is still monotonically suppressed under pressure and totally vanishes at P2=1.83 GPa similar to the bulk, the superconducting transition temperature (Tc) shows an initial decrease and consequent increase up to its maximum ∼ 8.03 K at P2, in sharp contrast with the M-shaped double domes in the bulk CsV3Sb5. Our results suggest the important role of reduced dimensionality on the CDW state and its interplay with the SC, offering a new perspective to explore the exotic nature of CsV3Sb5.
@article{arxiv.2402.06248,
title = {Distinct pressure evolution of superconductivity and charge-density-wave in kagome superconductor CsV$_3$Sb$_5$ thin flakes},
author = {Ge Ye and Mengwei Xie and Chufan Chen and Yanan Zhang and Dongting Zhang and Xin Ma and Xiangyu Zeng and Fanghang Yu and Yi Liu and Xiaozhi Wang and Guanghan Cao and Xiaofeng Xu and Xianhui Chen and Huiqiu Yuan and Chao Cao and Xin Lu},
journal= {arXiv preprint arXiv:2402.06248},
year = {2024}
}