Bilayer splitting and<i>c</i>-axis coupling in bilayer manganites showing colossal magnetoresistance
Bilayer splitting and<i>c</i>-axis coupling in bilayer manganites showing colossal magnetoresistance
By performing angle-resolved photoemission spectroscopy of the bilayer colossal magnetoresistive (CMR) manganite, ${\text{La}}_{2\ensuremath{-}2x}{\text{Sr}}_{1+2x}{\text{Mn}}_{2}{\text{O}}_{7}$, we provide the complete mapping of the Fermi-level spectral weight topology. Clear and unambiguous bilayer splitting of the in-plane $3{d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ band, mapped throughout the Brillouin zone, and the full mapping of the $3{d}_{3{z}^{2}\ensuremath{-}{r}^{2}}$ band are reported. Peculiar …