Bimagnon dispersion of La₂CuO₄ probed by resonant inelastic X-ray scattering.

ABSTRACT: We report on the study of the magnetic excitations of Mott insulator [Formula: see text] by using resonant inelastic x-ray scattering (RIXS) and cluster calculations within the framework of exact diagonalization. Our results demonstrate experimentally that the bimagnon excitation in Cu [Formula: see text]-edge RIXS is enhanced if the incident x-ray energy is slightly above the absorption edge. Through incident-energy-dependent momentum-resolved RIXS, we investigated the excitation of the bimagnon with predominantly [Formula: see text] symmetry. The bimagnons of [Formula: see text] exhibit a nearly flat dispersion with momentum along the Cu-O bond direction. This observation agrees with the bimagnon dispersion from the calculations on a single-band Hubbard model rather than a Heisenberg mod

SUBMITTER: Singh A 

PROVIDER: S-EPMC12488913 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature