Transport properties of Eu doped La 2 - x Sr x CuO 4

This work comprises the experimental investigation of several transport properties of the stripe ordering cuprate La1.8-xEu0.20SrxCuO4 (0.08 ( x (0.2), in particular electrical resistivity, Hall-effect, thermoelectric power and Nernst-effect. It is found that the stripe ordering has a strong impact on these quantities. Superconductivity is suppressed and the resistivity exhibits an upturn towards low temperatures. The Hall-coefficient, the thermopower and the Nernst-signal are strongly reduced. The data confirm that the Sr-concentration x = 1/8 is particular since this upturn in the resistivity is smallest and a sign change of the thermopower occurs at this doping level. Moreover, the suppression of the Hall-signal is only evident for x ( 1/8. In addition, the temperature-dependencies of the diagonal and off-diagonal components of the electrical conductivity do not exhibit a pronounced difference, which is contradicting previous results where a strong difference was found and 1D-conductionwithin the stripes was concluded. Finally, the suppression of the Nernst signal is only evident with respect to the superconducting phase of pure La2-xSrxCuO4. At higher temperatures the Nernst-signal is very similar for both materials and is unusually large for a normal state metal.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2004

Author dc:creator

• Ahmed, Emad Makboul Abdelhady

Contributors dc:contributor

• Büchner, Bernd

• info:eu-repo/classification/ddc/530
• Lanthanverbindungen
• Strontiumverbindungen
• Cuprate
• Dotierung
• Europium
• Ladungstransport
• Physik

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

eng

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123730%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:62137