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Determining the Short-Range Spin Correlations in the Spin-Chain Li2CuO2 and CuGeO3 Compounds Using Resonant Inelastic X-Ray Scattering

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2013
Author Monney Claude, Bisogni Valentina, Zhou Ke-Jin, Kraus Roberto, Strocov Vladimir N., Behr Guenter, Malek Jiri, Kuzian Roman, Drechsler Stefan-Ludwig, Johnston Steve, Revcolevschi Alexandre, Buechner Bernd, Ronnow Henrik M., van den Brink Jeroen, Geck Jochen, Schmitt Thorsten,
Project Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials
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Original article (peer-reviewed)

Volume (Issue) 110(8)
Page(s) 087403
Title of proceedings PHYSICAL REVIEW LETTERS
DOI 10.1103/PhysRevLett.110.087403

Open Access

Type of Open Access Repository (Green Open Access)


We report a high-resolution resonant inelastic soft x-ray scattering study of the quantum magnetic spin-chain materials Li2CuO2 and CuGeO3. By tuning the incoming photon energy to the oxygen K edge, a strong excitation around 3.5 eV energy loss is clearly resolved for both materials. Comparing the experimental data to many-body calculations, we identify this excitation as a Zhang-Rice singlet exciton on neighboring CuO4 plaquettes. We demonstrate that the strong temperature dependence of the inelastic scattering related to this high-energy exciton enables us to probe short-range spin correlations on the 1 meV scale with outstanding sensitivity.