Persistence of charge density wave fluctuations in the absence of long-range order in a hole-doped kagome metal
Abstract
Charge density waves in kagome metals are typically identified through long-range structural order, yet their fluctuating counterparts may play an equally important role in shaping electronic phases. Using ultrafast coherent phonon spectroscopy, the authors reveal that in hole-doped CsV₃Sb₅, strong charge density wave fluctuations persist far beyond the disappearance of static order, with picosecond correlation times. These fluctuations peak near a doping-tuned quantum phase transition that coincides with a minimum in the superconducting double dome. Their results establish fluctuating charge order as a robust and ubiquitous feature of kagome metals and highlight its potential influence on superconductivity and other emergent quantum phenomena.
Fields of Study & Subjects
Advanced Condensed Matter Physics
Catalysis and Oxidation Reactions
Publication details
- Journal / source
- Physical Review Materials
- Publisher
- American Physical Society (APS)
- Volume
- 10
- Issue
- 2
- Publication date
- 5 February 2026
- Language
- EN