Electron pockets in the Fermi surface of hole-doped high-Tc superconductors

David LeBoeuf, Nicolas Doiron-Leyraud, Julien Levallois, R. Daou, J.-B. Bonnemaison, N. E. Hussey, L. Balicas, B. J. Ramshaw, Ruixing Liang, D. A. Bonn, W. N. Hardy, S. Adachi, Cyril Proust () and Louis Taillefer ()
Additional contact information
David LeBoeuf: Université de Sherbrooke
Nicolas Doiron-Leyraud: Université de Sherbrooke
Julien Levallois: Laboratoire National des Champs Magnétiques Pulsés (LNCMP), UMR CNRS-UPS-INSA 5147, Toulouse 31400, France
R. Daou: Université de Sherbrooke
J.-B. Bonnemaison: Université de Sherbrooke
N. E. Hussey: H. H. Wills Physics Laboratory, University of Bristol
L. Balicas: National High Magnetic Field Laboratory (NHMFL), Florida State University, Tallahassee, Florida 32306, USA
B. J. Ramshaw: University of British Columbia
Ruixing Liang: University of British Columbia
D. A. Bonn: University of British Columbia
W. N. Hardy: University of British Columbia
S. Adachi: Superconductivity Research Laboratory, International Superconductivity Technology Center, Shinonome 1-10-13, Koto-ku, Tokyo 135-0062, Japan
Cyril Proust: Laboratoire National des Champs Magnétiques Pulsés (LNCMP), UMR CNRS-UPS-INSA 5147, Toulouse 31400, France
Louis Taillefer: Université de Sherbrooke

Nature, 2007, vol. 450, issue 7169, 533-536

Abstract: Pocket change A recent paper (Nature 447, 565—568 2007) described the electronic structure of a hole–doped high–temperature copper oxide superconductor in its normal metallic state. The Fermi surface observed in underdoped materials — made up of small pockets — was at odds with that of their overdoped counterparts, and quite unlike that of conventional metals. Now David LeBoeuf et al. use measurements of the Hall effect to show that these structures in the Fermi surface are electron pockets, not the 'hole' pockets suspected. This pocket formation could be a result of an enigmatic symmetry–breaking phase, similar to that seen in some electron-doped copper oxides. The implicated phase seems to be a generic property of the copper oxides, so may be expected to play a central role in shaping the properties of high–temperature superconductors.

Date: 2007
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DOI: 10.1038/nature06332

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