Electronic dispersion in the CE charge/orbital-ordered phase of LaSr$_{2}$Mn$_{2}$O$_{7}$ revealed by ARPES

Using angle-resolved photoemission spectroscopy, we investigated the E vs. $k$ dispersion of electrons in the CE charge/orbital-ordered phase of bi-layer manganite LaSr$_{2}$Mn$_{2}$O$_{7}$. We found that the Bloch band of hopping electrons is well maintained with a dispersion qualitatively different from various band calculations based on the zigzag chains in the CE phase. By comparing the dispersions and spectral weight in the CE-AFM, CE-PM and A-type AFM states, we~reveal the~strong influences of spin, charge, and orbital on electron hopping amplitudes.