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B. Vignolle1, A. Carrington2, R.A. Cooper2, M.M.J. French2, A.P. Mackenzie3, C. Jaudet1, D. Vignolles1, C. Proust1, N.E. Hussey2.
1Laboratoire National des Champs Magnétiques Pulsés (LNCMP), UMR CNRS-UPS-INSA 5147, Toulouse 31400, France. 2H.H. Wills physics laboratory, University of Bristol, Tyndall avenue, Bristol BS81TL, UK. 3School of physics and astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, UK We have recently measured quantum oscillations in the overdoped high-temperature superconductor Tl2Ba2CuO6+δ [1]. This experimental tour de force has revealed a Fermi surface composed of one large cylindrical orbit covering 65 % of the first Brillouin zone. These high field measurements are in excellent agreement with previous zero field measurements (ARPES [2]) and with high field ADMR experiment [3]. These measurements firmly establish the applicability of a generalized Fermi-liquid picture on the overdoped side of the phase diagram and the absence of the pseudogap at this doping level, with coherent quasiparticles all around the Fermi surface (especially in the antinodal direction where the pseudogap is maximal and electronic interactions are strongest). [1] Vignolle et al. , Nature 2008 [2] Plate et al. , PRB 2005 [3] Hussey et al. , Nature 2003 |
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