Momentum-resolved charge excitations in a one dimensional (1D) Mott insulator were studied. A high resolution inelastic x-ray scattering over the entire Brillouin zone was used to study the excitations. Excitations at the insulating gap edge were found to be highly dispersive compared to those observed in two-dimensional Mott insulators. Dispersions in 1D cuprates were consistent with models describing the motion of holons in 1D spin-1/2 Mott insulators. The results indicated the potential utility of momentum-resolved inelastic x-ray scattering in studying electronic structure of correlated insulators.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)