Electronic nature of charge density wave and electron-phonon coupling in kagome superconductor KV₃Sb₅.

ABSTRACT: The Kagome superconductors AV₃Sb₅ (A = K, Rb, Cs) have received enormous attention due to their nontrivial topological electronic structure, anomalous physical properties and superconductivity. Unconventional charge density wave (CDW) has been detected in AV₃Sb₅. High-precision electronic structure determination is essential to understand its origin. Here we unveil electronic nature of the CDW phase in our high-resolution angle-resolved photoemission measurements on KV₃Sb₅. We have observed CDW-induced Fermi surface reconstruction and the associated band folding. The CDW-induced band splitting and the associated gap opening have been revealed at the boundary of the pristine and reconstructed Brillouin zones. The Fermi surfac

SUBMITTER: Luo H 

PROVIDER: S-EPMC8755796 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature