Electron doping of a double-perovskite flat-band system.

ABSTRACT: Electronic structure calculations indicate that the Sr₂FeSbO₆ double perovskite has a flat-band set just above the Fermi level that includes contributions from ordinary subbands with weak kinetic electron hopping plus a flat subband that can be attributed to the lattice geometry and orbital interference. To place the Fermi energy in that flat band, electron-doped samples with formulas Sr_2-xLa_xFeSbO₆ (0 ≤ x ≤ 0.3) were synthesized, and their magnetism and ambient temperature crystal structures were determined by high-resolution synchrotron X-ray powder diffraction. All materials appear to display an antiferromagnetic-like maximum in the magnetic susceptibility, but the dominant spin coupling evolves from

SUBMITTER: Jin L 

PROVIDER: S-EPMC9974513 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature