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Direct evidence for charge stripes in a layered cobalt oxide

Author

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  • P. Babkevich

    (Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne)

  • P. G. Freeman

    (Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy, University of Central Lancashire)

  • M. Enderle

    (Institut Laue-Langevin, CS 20156)

  • D. Prabhakaran

    (University of Oxford, Clarendon Laboratory)

  • A. T. Boothroyd

    (University of Oxford, Clarendon Laboratory)

Abstract

Recent experiments indicate that static stripe-like charge order is generic to the hole-doped copper oxide superconductors and competes with superconductivity. Here we show that a similar type of charge order is present in La5/3Sr1/3CoO4, an insulating analogue of the copper oxide superconductors containing cobalt in place of copper. The stripe phase we have detected is accompanied by short-range, quasi-one-dimensional, antiferromagnetic order, and provides a natural explanation for the distinctive hourglass shape of the magnetic spectrum previously observed in neutron-scattering measurements of La2−xSrxCoO4 and many hole-doped copper oxide superconductors. The results establish a solid empirical basis for theories of the hourglass spectrum built on short-range, quasi-static, stripe correlations.

Suggested Citation

  • P. Babkevich & P. G. Freeman & M. Enderle & D. Prabhakaran & A. T. Boothroyd, 2016. "Direct evidence for charge stripes in a layered cobalt oxide," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11632
    DOI: 10.1038/ncomms11632
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