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Unusual magnetic order in the pseudogap region of the superconductor HgBa2CuO4+δ

Author

Listed:
  • Y. Li

    (Stanford University, Stanford, California 94305, USA)

  • V. Balédent

    (Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France)

  • N. Barišić

    (Stanford Synchrotron Radiation Laboratory, Stanford, California 94309, USA
    1. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany)

  • Y. Cho

    (Stanford Synchrotron Radiation Laboratory, Stanford, California 94309, USA
    BK21 Team of Nano Fusion Technology, Pusan National University)

  • B. Fauqué

    (Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France)

  • Y. Sidis

    (Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France)

  • G. Yu

    (Stanford University, Stanford, California 94305, USA)

  • X. Zhao

    (Stanford Synchrotron Radiation Laboratory, Stanford, California 94309, USA
    State Key Lab of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China)

  • P. Bourges

    (Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France)

  • M. Greven

    (Stanford Synchrotron Radiation Laboratory, Stanford, California 94309, USA
    Stanford University, Stanford, California 94305, USA)

Abstract

Pseudogaps: secret of superconductivity The pseudogap region of the phase diagram is an important unsolved puzzle in the field of high transition-temperature superconductivity. Li et al. report polarized neutron diffraction data that demonstrate that the characteristic temperature, T*, marks the onset of an unusual magnetic order, and hence a novel state of matter with broken time-reversal symmetry, for the model superconductor HgBa2CuO4+δ (Hg1201). The findings appear to rule out theories that regard T* as a crossover temperature rather than a phase transition temperature. Instead, they are consistent with the notion that many of the unusual properties arise from the presence of a quantum-critical point.

Suggested Citation

  • Y. Li & V. Balédent & N. Barišić & Y. Cho & B. Fauqué & Y. Sidis & G. Yu & X. Zhao & P. Bourges & M. Greven, 2008. "Unusual magnetic order in the pseudogap region of the superconductor HgBa2CuO4+δ," Nature, Nature, vol. 455(7211), pages 372-375, September.
    • Handle: RePEc:nat:nature:v:455:y:2008:i:7211:d:10.1038_nature07251
    DOI: 10.1038/nature07251
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