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Spatially resolved electronic structure inside and outside the vortex cores of a high-temperature superconductor

Author

Listed:
  • V. F. Mitrović

    (Northwestern University)

  • E. E. Sigmund

    (Northwestern University)

  • M. Eschrig

    (Argonne National Laboratory)

  • H. N. Bachman

    (Northwestern University)

  • W. P. Halperin

    (Northwestern University)

  • A. P. Reyes

    (National High Magnetic Field Laboratory)

  • P. Kuhns

    (National High Magnetic Field Laboratory)

  • W. G. Moulton

    (National High Magnetic Field Laboratory)

Abstract

Puzzling aspects of high-transition-temperature (high-Tc) superconductors include the prevalence of magnetism in the normal state and the persistence of superconductivity in high magnetic fields. Superconductivity and magnetism generally are thought to be incompatible, based on what is known about conventional superconductors. Recent results1, however, indicate that antiferromagnetism can appear in the superconducting state of a high-Tc superconductor in the presence of an applied magnetic field. Magnetic fields penetrate a superconductor in the form of quantized flux lines, each of which represents a vortex of supercurrents. Superconductivity is suppressed in the core of the vortex and it has been suggested that antiferromagnetism might develop there2. Here we report the results of a high-field nuclear-magnetic-resonance (NMR) imaging experiment3,4,5 in which we spatially resolve the electronic structure of near-optimally doped YBa2Cu3O7-δ inside and outside vortex cores. Outside the cores, we find strong antiferromagnetic fluctuations, whereas inside we detect electronic states that are rather different from those found in conventional superconductors.

Suggested Citation

  • V. F. Mitrović & E. E. Sigmund & M. Eschrig & H. N. Bachman & W. P. Halperin & A. P. Reyes & P. Kuhns & W. G. Moulton, 2001. "Spatially resolved electronic structure inside and outside the vortex cores of a high-temperature superconductor," Nature, Nature, vol. 413(6855), pages 501-504, October.
    • Handle: RePEc:nat:nature:v:413:y:2001:i:6855:d:10.1038_35097039
    DOI: 10.1038/35097039
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