Observation of multiple Zhang-Rice excitations in a correlated solid: Resonant inelastic X-ray scattering study of Li2CuO2
Journal
EPL
Journal Volume
79
Journal Issue
4
Date Issued
2007
Author(s)
Learmonth, T.
McGuinness, C.
Glans, P. A.
Downes, J. E.
Schmitt, T.
Duda, L. C.
Guo, J. H.
Smith, K. E.
Abstract
Multiple Zhang-Rice type spectral features have been observed in resonant inelastic X-ray scattering (RIXS) from the quasi–one-dimensional cuprate charge transfer insulator Li2CuO2. The first feature appears at constant emission energy, and is associated with a Zhang-Rice singlet final state. The second is an interplaquette charge transfer excitation that results in a novel triplet Zhang-Rice–type final state. It is accompanied by the presence of a O 2p nonbonding to upper Hubbard band excitation at an energy close to that of a calculated triplet charge transfer Zhang-Rice–type excitation. The site selectivity and polarization rules associated with RIXS allows these two excitations to be distinguished.
SDGs
Type
journal article