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Unconventional charge order in a co-doped high-Tc superconductor

Author

Listed:
  • D. Pelc

    (Faculty of Science, University of Zagreb)

  • M. Vučković

    (Faculty of Science, University of Zagreb)

  • H. -J. Grafe

    (IFW Dresden, Institute for Solid State Research)

  • S. -H. Baek

    (IFW Dresden, Institute for Solid State Research)

  • M. Požek

    (Faculty of Science, University of Zagreb)

Abstract

Charge-stripe order has recently been established as an important aspect of cuprate high-Tc superconductors. However, owing to the complex interplay between competing phases and the influence of disorder, it is unclear how it emerges from the parent high-temperature state. Here we report on the discovery of an unconventional ordered phase between charge-stripe order and (pseudogapped) metal in the cuprate La1.8−xEu0.2SrxCuO4. We use three complementary experiments—nuclear quadrupole resonance, nonlinear conductivity and specific heat—to demonstrate that the order appears through a sharp phase transition and exists in a dome-shaped region of the phase diagram. Our results imply that the new phase is a state, which preserves translational symmetry: a charge nematic. We thus resolve the process of charge-stripe development in cuprates, show that this nematic phase is distinct from high-temperature pseudogap and establish a link with other strongly correlated electronic materials with prominent nematic order.

Suggested Citation

  • D. Pelc & M. Vučković & H. -J. Grafe & S. -H. Baek & M. Požek, 2016. "Unconventional charge order in a co-doped high-Tc superconductor," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12775
    DOI: 10.1038/ncomms12775
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