15–16 Sept 2011
Paul Scherrer Institut, Villigen, Switzerland
Europe/Zurich timezone

Probing the Local Magnetic Order of Quasi-1D Cuprates with RIXS

17 Sept 2011, 09:00
30m
WBGB/019 (PSI)

WBGB/019

PSI

Talk Resonant Inelastic and Elastix X-ray Scattering Resonant Inelastic and Elastic X-ray Scattering

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)

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