Charge ordering transition in La$_{1.67}$Sr$_{0.33}$NiO$_4$ studied by Angle Resolved Photoemission Spectroscopy

The La$_{1.67}$Sr$_{0.33}$NiO$_{4 }$compound has attracted a lot of interested due to the report of static spin-charge stripe ordering, as well as for being isostructural to the high temperature superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$. While several theoretical and experimental studies have been reported to investigate the stripe phase in this compound, a full analysis of its electronic properties and how this evolves in the stripe phase is still missing in the literature. Here we present the first high-resolution angle resolved photoemission study of a single crystal of La$_{1.67}$Sr$_{0.33}$NiO$_{4}$. Data below and above the charge ordering temperature are presented. The evolution of the electronic structure as well as the changes observed in quasiparticle lineshapes through the stripe phase are discussed.