https://doi.org/10.1140/epjst/e2010-01300-6
Regular Article
Nernst effect of stripe ordering La1.8−xEu0.2SrxCuO4
1 IFW-Dresden, Institute for Solid State Research, PO Box 270116, 01171 Dresden, Germany
2 Laboratoire de Physico-Chimie de L’État Solide, ICMMO, UMR 8182, Université Paris-Sud, 91405 Orsay Cedex, France
a e-mail: c.hess@ifw-dresden.de
b Present address: Solid State Physics Department, National Research Center, Postal Code 12622, Dokki, Cairo, Egypt
Received:
14
July
2010
Revised:
12
August
2010
Published online:
11
October
2010
We investigate the transport properties of La1.8−xEu0.2SrxCuO4 (x = 0.04, 0.08, 0.125, 0.15, 0.2) with a special focus on the Nernst effect in the normal state. Various anomalous features are present in the data. For x = 0.125 and 0.15 a kink-like anomaly is present in the vicinity of the onset of charge stripe order in the LTT phase, suggestive of enhanced positive quasiparticle Nernst response in the stripe ordered phase. At higher temperature, all doping levels except x = 0.2 exhibit a further kink anomaly in the LTO phase which cannot unambiguously be related to stripe order. Moreover, a direct comparison between the Nernst coefficients of stripe ordering La1.8−xEu0.2SrxCuO4 and superconducting La2−xSrxCuO4 at the doping levels x = 0.125 and x = 0.15 reveals only weak differences. Our findings make high demands on any scenario interpreting the Nernst response in hole-doped cuprates.
© EDP Sciences, Springer-Verlag, 2010