Presence of a d3z2−r2 pocket at the Brillouin-zone corner in La4Ni3O10

Determine whether trilayer La4Ni3O10 hosts a d3z2−r2‑derived Fermi‑surface pocket at the Brillouin‑zone corner crossing the Fermi level and characterize its contribution to the low-energy electronic structure.

Background

The trilayer La4Ni3O10 band structure comprises symmetric and antisymmetric sectors, yielding multiple Fermi-surface sheets. Whether a d3z2−r2 pocket exists at the Brillouin-zone corner is a key unresolved feature that impacts interpretations of nesting, density waves, and potential pairing channels.

The authors expressly state that the presence of this pocket remains unresolved, motivating targeted spectroscopic and quantum oscillation studies.