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

R. I. Tobey, S. Wall, M. Först, H. Bromberger, V. Khanna, J. J. Turner, W. Schlotter, M. Trigo, O. Krupin, W. S. Lee, Y.-D. Chuang, R. Moore, A. L. Cavalieri, S. B. Wilkins, H. Zheng, J. F. Mitchell, S. S. Dhesi, A. Cavalleri, and J. P. Hill
Phys. Rev. B 86, 064425 – Published 17 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-layer manganite 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 obtainable with any other techniques and hint at previously unresolved processes in the dynamics of photomelting in strongly correlated systems.

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  • Received 24 February 2012

DOI:https://doi.org/10.1103/PhysRevB.86.064425

©2012 American Physical Society

Authors & Affiliations

R. I. Tobey1,*, S. Wall2, M. Först3, H. Bromberger3, V. Khanna3,4,5, J. J. Turner6, W. Schlotter6, M. Trigo7, O. Krupin6,8, W. S. Lee9, Y.-D. Chuang10, R. Moore9, A. L. Cavalieri3, S. B. Wilkins1, H. Zheng11, J. F. Mitchell11, S. S. Dhesi4, A. Cavalleri3,5, and J. P. Hill1

  • 1Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 2Fritz-Haber Institute of the Max Planck Society, Berlin, Germany
  • 3Max-Planck Department for Structural Dynamics, Center for Free Electron Laser Science, University of Hamburg, Germany
  • 4Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, United Kingdom
  • 5Department of Physics, Clarendon Laboratory, Oxford University, United Kingdom
  • 6Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 7PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 8European XFEL GmbH, Hamburg, Germany
  • 9The Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 10Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 11Material Science Department, Argonne National Laboratory, Argonne, Illinois 60439, USA

  • *Present address: Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands; r.i.tobey@rug.nl

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Vol. 86, Iss. 6 — 1 August 2012

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