Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 7: Superconductivity & Solids At Low Temperature - Poster Session

TT 7.21: Poster

Montag, 27. März 2006, 14:00–17:45, P1

Unusual Nernst effect in various superconductors — •C. Hess¹, E. Ahmed¹, C. Falkenberg¹, D. Souptel¹, G. Behr¹, B. Büchner¹, U. Ammerahl², and A. Revcolevschi² — ¹IFW Dresden, Germany — ²Laboratoire de Physico-Chimie des Solides, Université Paris-Sud, France

We present experimental results of the Nernst-effect in the normal state of various superconductors. In particular, we investigated the high temperature superconductor La₂Sr_xCuO₄ with and without Eu-doping. The Eu-ions suppress superconductivity and stabilize a stripe phase in the CuO₂-planes of the materials. We find that the relatively large Nernst-coefficient which has previously been reported for the normal state in pure La₂Sr_xCuO₄ is also present in the Eu-doped materials extending deep into the stripe ordered phase. We compare these results with the Nernst-effect of the superconductor YNi₂B₂C.