Speaker
Dr
C Monney
(Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland,)
Description
We have performed Resonant Inelastic X-ray Scattering (RIXS) at the Cu L- and O K-resonance at the ADRESS beamline of the Swiss Light Source on the quasi-one-dimensional cuprates Li2CuO2 and CuGeO3, prototype edge-sharing chain compounds showing different magnetic ground states at low temperature. The RIXS spectra display a complicated interplay of low-energy excitations from charge, orbital and lattice degrees of freedom.
In particular, we discuss charge transfer related spectral components in the scenario of exotic Zhang-Rice (ZR) singlet and triplet excitations which can be reached in the final state with O K-edge RIXS. Temperature dependent measurements evidence specific temperature behavior for the related peaks, strongly depending on the nature of the magnetic ground state. Our interpretation is further supported by state-of-the-art cluster-based RIXS calculations. Comparing the excitation energy of both ZR features allows to directly determine the binding energy of the Zhang-Rice singlet in Li2CuO2 from the spectra. Finally, this study suggests RIXS as an excellent probe for investigating local magnetic order.
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Talk
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RIXS
Primary author
Dr
C Monney
(Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland,)
Co-authors
Dr
J Geck
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
J Malek
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
J van der Brink
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
K J Zhou
(Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)
Dr
R Kraus
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
R Kuzian
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
S L Drechsler
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
T Schmitt
(Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)
Dr
V Bisogni
(Leibniz Institute for Solid State and Materials Research Dresden, D-01171 Dresden, Germany)
Dr
V Strocov
(Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)
