Abstract
A comprehensive angle-resolved photoemission spectroscopy study of the band structure in single-layer cuprates is presented with the aim of uncovering universal trends across different materials. Five different hole- and electron-overdoped cuprate superconductors (, , , , and ) have been studied with special focus on the bands with a predominately -orbital character. Using a light polarization analysis, the and bands are identified across these materials. A clear correlation between the band energy and the apical oxygen distance is demonstrated. Moreover, the compound dependence of the band bottom and the band top is revealed. A direct comparison to density functional theory (DFT) calculations employing hybrid exchange-correlation functionals demonstrates excellent agreement. We thus conclude that the DFT methodology can be used to describe the global band structure of overdoped single-layer cuprates on both the hole- and electron-doped side.
- Received 12 February 2019
- Revised 2 April 2019
DOI:https://doi.org/10.1103/PhysRevB.99.224509
©2019 American Physical Society