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Evolution of three-dimensional correlations during the photoinduced melting of antiferromagnetic order in La0.5Sr1.5MnO4

DOI: 10.1103/PhysRevB.86.064425 DOI Help

Authors: R. Tobey (Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory) , S. Wall (Fritz-Haber Institute of the Max Planck Society) , M. Foerst (Max-Planck Department for Structural Dynamics, Center for Free Electron Laser Science, University of Hamburg) , H. Bromberger (University of Hamberg) , V. Khanna (Diamond Light Source) , J. J. Turner (SLAC National Accelerator Laboratory, USA.) , W. Schlotter (SLAC National Accelerator Laboratory, USA) , M. Trigo (SLAC National Accelerator Laboratory, USA) , O. Krupin (SLAC National Accelerator Laboratory, USA.) , W. S. Lee (SLAC National Accelerator Laboratory, USA) , Y. -d. Chuang (Advanced Light Source, USA) , R. Moore (SLAC National Accelerator Laboratory, USA) , A. L. Cavalieri (University of Hamburg, Germany) , S. B. Wilkins (Brookhaven National Laboratory, USA.) , H. Zheng (Argonne National Laboratory, USA) , J. F. Mitchell (Argonne National Laboratory, USA.) , S. Dhesi (Diamond Light Source) , A. Cavalleri (University of Oxford) , J. P. Hill (Brookhaven National Laboratory, USA.)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 86 (6)

State: Published (Approved)
Published: August 2012

Abstract: Using time-resolved resonant soft x-ray diffraction, we measure the evolution of the full three-dimensional scattering volume of the antiferromagnetic superlattice reflection in the single-layermanganite La0.5Sr1.5MnO4on femtosecond time scales following photoexcitation. We find that the in-plane correlations are unchanged as a metastable state is entered, however there are subtle changes in the c-axis correlations. We observe a transient shift of the scattering ellipsoid along (00L) at very short times, and at longer time scales the short-range c-axis correlations are more robust than they are in equilibrium. Such results are not obtainablewith any other techniques and hint at previously unresolved processes in the dynamics of photomelting in strongly correlated systems.

Subject Areas: Physics

Facility: SLAC National Accelerator Laboratory

Added On: 08/10/2012 14:25

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