Femtosecond x rays link melting of charge-density wave correlations and light-enhanced coherent transport in YBa2Cu3O6.6

M. Först, A. Frano, S. Kaiser, R. Mankowsky, C. R. Hunt, J. J. Turner, G. L. Dakovski, M. P. Minitti, J. Robinson, T. Loew, M. Le Tacon, B. Keimer, J. P. Hill, A. Cavalleri, and S. S. Dhesi
Phys. Rev. B 90, 184514 – Published 17 November 2014
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Abstract

We use femtosecond resonant soft x-ray diffraction to measure the optically stimulated ultrafast changes of charge-density wave correlations in underdoped YBa2Cu3O6.6. We find that when coherent interlayer transport is enhanced by optical excitation of the apical oxygen distortions, at least 50% of the in-plane charge-density wave order is melted. These results indicate that charge ordering and superconductivity may be competing up to the charge ordering transition temperature, with the latter becoming a hidden phase that is accessible only by nonlinear phonon excitation.

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  • Received 8 September 2014
  • Revised 17 October 2014

DOI:https://doi.org/10.1103/PhysRevB.90.184514

©2014 American Physical Society

Authors & Affiliations

M. Först1,2, A. Frano3,4, S. Kaiser1,2, R. Mankowsky1,2, C. R. Hunt1,2,5, J. J. Turner6, G. L. Dakovski6, M. P. Minitti6, J. Robinson6, T. Loew3, M. Le Tacon3, B. Keimer3, J. P. Hill7, A. Cavalleri1,2,8, and S. S. Dhesi9

  • 1Max-Planck Institute for the Structure and Dynamics of Matter, 22761 Hamburg, Germany
  • 2Center for Free Electron Laser Science, 22761 Hamburg, Germany
  • 3Max-Planck Institute for Solid State Research, 70569 Stuttgart, Germany
  • 4Helmholtz-Zentrum Berlin für Materialien und Energie, 12489 Berlin, Germany
  • 5Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802, USA
  • 6Linac Coherent Light Source, Stanford Linear Accelerator Center (SLAC) National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 7Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
  • 8Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, United Kingdom
  • 9Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom

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Issue

Vol. 90, Iss. 18 — 1 November 2014

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