Altermagnetic ground state in distorted Kagome metal CsCr₃Sb₅.

ABSTRACT: The CsCr₃Sb₅ exhibits superconductivity in close proximity to a density-wave (DW) like ground state at ambient pressure¹, however details of the DW is still elusive. Using first-principles density-functional calculations, we found its ground state to be a 4 × 2 altermagnetic spin-density-wave (SDW) at ambient pressure, with an averaged effective moment of  ~ 1.7μ_B/Cr. The magnetic long range order is coupled to the lattice, generating 4a₀ structural modulation. Multiple competing SDW phases are present and energetically close, suggesting strong magnetic fluctuation at finite temperature. The electronic states near Fermi level are dominated by Cr-3d orbitals, and the kagome flat bands are closer to the Fermi level than those in the AV

SUBMITTER: Xu C 

PROVIDER: S-EPMC11961742 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature