Regensburg 2004 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 8: Postersitzung I: Supraleitung

TT 8.44: Poster

Montag, 8. März 2004, 14:30–19:00, Poster A

Nernst effect of stripe ordering La_1.8−xEu_0.2Sr_xCuO₄ — •E. Ahmed¹, C. Hess², B. Büchner³, U. Ammeral⁴, A. Revcolevschi⁴, and B. Keimer⁵ — ¹II. Physikalisches Institut, RWTH Aachen, D-52056 Aachen — ²Department of Condensed Matter Physics, University of Geneva, Switzerland — ³IFW Dresden, D-01171 Dresden — ⁴Laboratoire de Physico-Chimie des Solides, Université Paris-Sud, France — ⁵MPI für Festkörperforschung, D-70506 Stuttgart

Nernst effect has been measured for a wide range of stripe ordering La_1.8−xEu_0.2Sr_xCuO₄ single crystals. We observe that compared to superconducting La_2−xSr_xCuO₄, the Nernst signal in the non-superconducting stripe phase is suppressed. Nevertheless, at higher temperatures we find a relatively large Nernst signal for a wide temperature range, similar to the findings in La_2−xSr_xCuO₄. We discuss possible origins of this unusual large Nernst signal.