Observation of multiple Zhang-Rice excitations in a correlated solid: Resonant inelastic X-ray scattering study of Li2CuO2

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 se...

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Bibliographic Details
Published in:Europhysics letters 2007-08, Vol.79 (4), p.47012
Main Authors: Learmonth, T, McGuinness, C, Glans, P.-A, Downes, J. E, Schmitt, T, Duda, L.-C, Guo, J.-H, Chou, F. C, Smith, K. E
Format: Article
Language:English
Subjects:
71.10.Li
71.20.-b
74.72.-h
Fysik
NATURAL SCIENCES
NATURVETENSKAP
Physics
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Summary: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.
ISSN:0295-5075
1286-4854
1286-4854
DOI:10.1209/0295-5075/79/47012