Speaker
Dr
R Tobey
(Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton NY 11793, USA)
Description
Resonant Soft X-Ray Diffraction at the LCLS free electron laser is used to probe stimulated dynamics in two canonical strongly correlated materials. In the first example, I’ll discuss the reconstruction of the 3D scattering volume of the (.25 .25 .5) antiferromagnetic reflection in the layered compound La0.5Sr1.5MnO4 measured at the Mn L-edge. Upon stimulation at near infrared wavelengths, the full scattering volume helps us visualize a transient incommensurability in the scattering wave vector, which recovers on a timescale of under 3ps. In the second example, we study the stripe ordered cuprate La1.875Ba.125CuO4. We measure the structural, LTT-allowed, (0 0 1) reflection and the stripe ordered (.25 0 .5) reflection at the O K-edge and observe their dynamic decoupling when subjected to IR excitation resonant with an optical phonon.
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Talk
Please specify the session
RIXS
Primary author
Dr
R Tobey
(Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton NY 11793, USA)
