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Non-ohmic electrical transport properties above the critical temperature in optimally and underdoped superconducting YBa<sub>2</sub>Cu<sub>3</sub>O<sub>6+x</sub>

Autor(en)
Wolfgang Lang, Ionut Puica, Georg Zechner, T. Kitzler, Marius Bodea, Khurram Siraj, Johannes D. Pedarnig
Abstrakt

The resistivity and the Hall effect as a function of current density and temperature in the normal state of very thin films of YBa2Cu3O6+x are measured with a fast pulsed-current technique. The in-plane longitudinal and transverse (Hall) conductivities are reduced in intense current densities up to several . In optimally-doped samples, this non-ohmic effect is limited to temperatures below 100 K. In a moderately underdoped sample, however, the non-linearity extends to the temperature range from Tc =53 K to similar to 150 K. The non-linear part of the Hall conductivity does not scale with a critical exponent, thus excluding classical amplitude fluctuations of the superconducting order parameter as possible origin.

Organisation(en)
Elektronische Materialeigenschaften
Externe Organisation(en)
Universität Wien, Johannes Kepler Universität Linz
Journal
Journal of Superconductivity and Novel Magnetism
Band
25
Seiten
1361-1364
Anzahl der Seiten
4
ISSN
1557-1939
DOI
https://doi.org/10.1007/s10948-012-1660-8
Publikationsdatum
2012
Peer-reviewed
Ja
ÖFOS 2012
103009 Festkörperphysik, 103015 Kondensierte Materie, 103018 Materialphysik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/6d8df025-96ef-49c6-a516-837a62e49138