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Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites

Author

Listed:
  • N. Mannella

    (Stanford University
    Advanced Light Source, Lawrence Berkeley National Laboratory)

  • W. L. Yang

    (Stanford University
    Advanced Light Source, Lawrence Berkeley National Laboratory)

  • X. J. Zhou

    (Stanford University
    Advanced Light Source, Lawrence Berkeley National Laboratory)

  • H. Zheng

    (Argonne National Laboratory)

  • J. F. Mitchell

    (Argonne National Laboratory)

  • J. Zaanen

    (Stanford University
    Leiden University)

  • T. P. Devereaux

    (University of Waterloo)

  • N. Nagaosa

    (The University of Tokyo
    Correlated Electron Research Center, AIST)

  • Z. Hussain

    (Advanced Light Source, Lawrence Berkeley National Laboratory)

  • Z.-X. Shen

    (Stanford University)

Abstract

Mind the pseudogap A surprise finding has united the physics of two of the most important classes of materials in condensed-matter physics, but it seems to raise more questions than it answers. High-temperature copper oxide superconductors display what was thought to be a characteristic feature, a difference between electronic excitations in directions parallel and diagonal to the bonds between copper and oxygen atoms. This gap structure or ‘pseudogap’ state seemed to be unique to these compounds, so it was natural to assume it had something to do with superconductivity. But now a similar state has been identified in a ferromagnetic bilayer manganite, a ‘colossal magnetoresistive material’ that is very different from a superconductor. The ‘enigmatic’ pseudogap structure has become a bit more enigmatic, and as a result researchers are likely to reconsider the nature of the link to superconductivity.

Suggested Citation

  • N. Mannella & W. L. Yang & X. J. Zhou & H. Zheng & J. F. Mitchell & J. Zaanen & T. P. Devereaux & N. Nagaosa & Z. Hussain & Z.-X. Shen, 2005. "Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites," Nature, Nature, vol. 438(7067), pages 474-478, November.
    • Handle: RePEc:nat:nature:v:438:y:2005:i:7067:d:10.1038_nature04273
    DOI: 10.1038/nature04273
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