Electronic instabilities of kagome metals: Saddle points and Landau theory
Electronic instabilities of kagome metals: Saddle points and Landau theory
We study electronic instabilities of a kagome metal with a Fermi energy close to saddle points at the hexagonal Brillouin zone face centers. Using parquet renormalization group, we determine the leading and subleading instabilities, finding superconducting, charge, orbital moment, and spin density waves. We then derive and use Landau theory …