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

DOI: 10.1103/PhysRevB.86.064425

Authors: R. Tobey (Brookhaven National Laboratory) , S. Wall (Fritz-Haber Institute of the Max Planck Society) , M. Foerst (University of Hamburg) , H. Bromberger (University of Hamberg) , V. Khanna (University of Hamburg; Diamond Light Source; Oxford University) , J. J. Turner (Linac Coherent Light Source, SLAC National Accelerator Laboratory) , W. Schlotter (Linac Coherent Light Source, SLAC National Accelerator Laboratory) , M. Trigo (PULSE Institute, SLAC National Accelerator Laboratory) , O. Krupin (Linac Coherent Light Source, SLAC National Accelerator Laboratory; European XFEL GmbH) , W. S. Lee (The Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory) , Y. -D. Chuang (Advanced Light Source, Lawrence Berkeley National Laboratory) , R. Moore (The Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory) , A. L. Cavalieri (University of Hamburg) , S. B. Wilkins (Brookhaven National Laboratory) , H. Zheng (Argonne National Laboratory) , J. F. Mitchell (Argonne National Laboratory) , S. S. Dhesi (Diamond Light Source) , A. Cavalleri (University of Hamburg; Oxford University) , J. P. Hill (Brookhaven National Laboratory)
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.

Diamond Keywords: Antiferromagnetism

Subject Areas: Physics, Materials

Facility: SLAC National Accelerator Laboratory

Added On: 08/10/2012 14:25

Discipline Tags:

Quantum Materials Physics Magnetism Materials Science

Technical Tags: