Hidden magnetic excitation in the pseudogap phase of a high-Tc superconductor

Yuan Li, V. Balédent, G. Yu, N. Barišić, K. Hradil, R. A. Mole, Y. Sidis, P. Steffens, X. Zhao, P. Bourges and M. Greven ()
Additional contact information
Yuan Li: Stanford University
V. Balédent: Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France
G. Yu: School of Physics and Astronomy, University of Minnesota
N. Barišić: T.H. Geballe Laboratory for Advanced Materials, Stanford University
K. Hradil: Institut für Physikalische Chemie, Universität Göttingen, 37077 Göttingen, Germany
R. A. Mole: Forschungsneutronenquelle Heinz Maier-Leibnitz, 85747 Garching, Germany
Y. Sidis: Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France
P. Steffens: Institut Laue Langevin
X. Zhao: T.H. Geballe Laboratory for Advanced Materials, Stanford University
P. Bourges: Laboratoire Léon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif sur Yvette, France
M. Greven: School of Physics and Astronomy, University of Minnesota

Nature, 2010, vol. 468, issue 7321, 283-285

Abstract: The pseudogap enters a new phase The pseudogap phenomenon, a discontinuity in the energy level of a material's electronic spectrum, is a universal characteristic of the high transition temperature (Tc) copper oxides. The nature of the pseudogap has been a central question in condensed matter physics for more than a decade, but many of its properties remain unexplained. Recent studies have pointed to the universal existence of an unusual magnetic order below T*, the temperature below which the anomalous properties associated with the pseudogap become apparent. If confirmed, this would have the profound implication that the pseudogap regime constitutes a genuine new phase of matter rather than a mere crossover phenomenon. The results of inelastic neutron scattering experiments on the superconductor HgBa2CuO4+δ (Hg1201) now reveal a fundamental collective magnetic mode associated with the unusual order, providing further support for this picture.

Date: 2010
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DOI: 10.1038/nature09477

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