Lack of temperature dependence for the filling of the metallic-like bands in Si(553)-Au

Abstract

We study the temperature dependence of the metallic-like bands of Si(553)-Au by angular-resolved photoemission spectroscopy (ARPES). First, we define a protocol for dealing with the short-term stability due to surface contamination and the effect of photo-voltage. After that, we extract the changes in the band-filling and Fermi-velocity. We conclude that both quantities change only weakly with temperature. This lack of temperature dependence can be compared to currently proposed models for the temperature evolution of the electronic structure of Si(553)-Au.