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Spurious magnetism in high-Tc superconductor

Author

Listed:
  • P. K. Mang

    (Stanford University, Stanford)

  • S. Larochelle

    (Stanford University, Stanford)

  • M. Greven

    (Stanford University, Stanford
    Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford)

Abstract

One challenge in condensed-matter physics is to unravel the interplay between magnetism and superconductivity in copper oxides with a high critical temperature (Tc). Kang et al.1 claim to have revealed a quantum phase transition from the superconducting to an antiferromagnetic state in the electron-doped material Nd2−xCexCuO4 (NCCO) based on the observation of magnetic-field-induced neutron-scattering intensity at (1/2,1/2,0), (1/2,0,0) and related reflections. Here we argue that the observed magnetic intensity is due to a secondary phase of (Nd,Ce)2O3. We therefore contend that the effect is spurious and not intrinsic to superconducting NCCO.

Suggested Citation

  • P. K. Mang & S. Larochelle & M. Greven, 2003. "Spurious magnetism in high-Tc superconductor," Nature, Nature, vol. 426(6963), pages 139-140, November.
    • Handle: RePEc:nat:nature:v:426:y:2003:i:6963:d:10.1038_426139b
    DOI: 10.1038/426139b
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