Temperature-dependent photoemission studies of the electronic states of CuBr

Abstract

Photoemission spectra of CuBr are found to be unusually temperature dependent, which is attributed to the modulation of hybridization between Cu $d$ orbitals and Br $p$ orbitals. The density of states deduced shows two separate parts of valence states with a 1-eV gap in between. Atomic origins of structures in the deduced valence-band density of states have also been assigned.