The kagome superconductor CsV3Sb5 exhibits a charge density wave (CDW) as well as superconductivity (SC). Here, the authors find that the CDW transition temperature decreases with decreasing sample thickness to 72 K at 27 atomic layers, but then unexpectedly increases to 120 K at 5 layers, an opposite trend to SC.
- Boqin Song
- Tianping Ying
- Shiyan Li
