Enhancement of the Nernst effect by stripe order in a high-Tc superconductor

Olivier Cyr-Choinière, R. Daou, Francis Laliberté, David LeBoeuf, Nicolas Doiron-Leyraud, J. Chang, J.-Q. Yan, J.-G. Cheng, J.-S. Zhou, J. B. Goodenough, S. Pyon, T. Takayama, H. Takagi, Y. Tanaka and Louis Taillefer ()
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Olivier Cyr-Choinière: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
R. Daou: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
Francis Laliberté: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
David LeBoeuf: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
Nicolas Doiron-Leyraud: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
J. Chang: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
J.-Q. Yan: Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA
J.-G. Cheng: Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA
J.-S. Zhou: Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA
J. B. Goodenough: Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712, USA
S. Pyon: University of Tokyo
T. Takayama: University of Tokyo
H. Takagi: University of Tokyo
Y. Tanaka: University of Tokyo
Louis Taillefer: Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada

Nature, 2009, vol. 458, issue 7239, 743-745

Abstract: The Nernst erect enhanced The Nernst effect in metals is highly sensitive to two kinds of phase transition: superconductivity and density-wave order. The large positive Nernst signal observed in hole-doped high-Tc superconductors above their transition temperature Tc has so far been attributed to fluctuating superconductivity. Cyr-Choinière et al. report that in some of these materials the large Nernst signal is in fact caused by stripe order, a form of spin/charge modulation that causes a reconstruction of the Fermi surface. In LSCO doped with Nd or Eu, the onset of stripe order causes the Nernst signal to go from small and negative to large and positive.

Date: 2009
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DOI: 10.1038/nature07931

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