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

In this study, 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.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [3] ;  [4] ;  [4] ;  [4] ;  [4] ;  [5] ;  [5] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)
  2. Max-Planck Institute for Solid State Research, Stuttgart (Germany); Helmholtz-Zentrum Berlin fur Materialien und Energie, Berlin (Germany)
  3. Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Max-Planck Institute for Solid State Research, Stuttgart (Germany)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States)
  7. Max-Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany); Univ. of Oxford (United Kingdom)
  8. Diamond Light Source, Didcot (United Kingdom)
Publication Date:
OSTI Identifier:
1182511
Report Number(s):
BNL--107480-2015-JA
Journal ID: ISSN 1098-0121; PRBMDO; R&D Project: PO011; KC0201060
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 18; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY