Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 53: Magnetic Scattering Methods

MA 53.3: Vortrag

Freitag, 11. März 2016, 10:00–10:15, H33

Study of the Spin-Chain cuprate Sr2CuO3 with OK-edge Resonant Inelastic X-ray Scattering — •Justine Schlappa^1,2, Umesh Kumar³, Ke-Jin Zhou^2,4, Surjeet Singh^5,6, Vladimir N. Strocov², Alexandre Revcolevschi⁴, Henrik M. Ronnow⁷, Steve Johnston³, and Thorsten Schmitt² — ¹European X-ray Free Electron Laser Facility GmbH, Hamburg, Germany — ²Paul Scherrer Institut, Villigen, Switzerland — ³University of Tennessee, Knoxville, USA — ⁴Diamond Light Source, Oxfordshire, UK — ⁵Université Paris-Sud, Orsay, France — ⁶Indian Institute of Science, Education and Research, Pune, India — ⁷École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

We present the study of Heisenberg Spin-1/2 chain compound Sr2CuO3 with oxygen K-edge Resonant Inelastic X-ray Scattering. The spectra reveal a range of low-energy excitations between tens of meV and 8 eV. From small-cluster exact diagonalization calculations the structures at higher energies can be assigned to dd and charge-transfer excitations, whereas the structures below 1 eV partially to spin- and phonon excitations. The photon wave length allowed accessing half of the Briolluin zone in this study.