Quantum oscillations and Fermi surface in underdoped YBa$_2$Cu$_3$O$_{6.5}$

ORAL

Abstract

We report quantum oscillations in the transport properties of YBa$_2$Cu$_3$O$_{6.5}$ at 10\% doping, showing that a well-defined Fermi surface with closed orbits is a fundamental property of underdoped cuprates. In contrast with the large Fermi surface seen on the overdoped side, we observe a very small orbit whose area is only 1.9\% of the Brillouin zone. Such a small Fermi surface does not come from the band structure of YBa$_2$Cu$_3$O$_{6.5}$ and is most likely the result of a reconstruction.

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Authors

  • Nicolas Doiron-Leyraud

    Universite de Sherbrooke

  • Cyril Proust

    LNCMP Toulouse, LNCMP - CNRS

  • David LeBoeuf

    Universite de Sherbrooke

  • Julien Levallois

    LNCMP Toulouse

  • Jean-Baptiste Bonnemaison

    Universite de Sherbrooke

  • Ruixing Liang

    University of British Columbia and CIAR

  • Doug Bonn

    University of British Columbia, Department of Physics and Astronomy, University of British Columbia, University of British Columbia and CIAR

  • Walter Hardy

    University of British Columbia and CIAR

  • Louis Taillefer

    Universite de Sherbrooke and CIAR, Univ of Sherbrooke, D\'epartement de Physique, Universit\'e de Sherbrooke, Sherbrooke, Canada