Volume 86, Number 1, April 2009
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 April 2009|
Influence of the pseudogap on the Nernst coefficient of Y0.9 Ca0.1Ba2Cu3Oy
Cavendish Laboratory, Department of Physics, University of Cambridge J. J. Thomson Avenue, Cambridge CB3 0HE, UK, EU
2 Institute of Low Temperature and Structure Research, Polish Academy of Sciences P.O. Box 1410, 50-950 Wrocław, Poland, EU
3 Department of Physics, University of Rajshahi - Raj-6205, Bangladesh
4 Department of Physics, Faculty of Science, University of Zagreb - P.O. Box 331, Zagreb, Croatia
Corresponding author: email@example.com
Accepted: 15 March 2009
We have studied the Nernst coefficient, , of epitaxial thin films of the superconductor YCaxBa2Cu3Oy with and . The sample has been measured at three different values of y, in the over- (OV), optimally- (OP), and under-doped (UD) states. As the doping level is reduced, starts to fall linearly with T at the temperature (T*) where we expect to see the influence of the pseudogap. The onset temperature of the superconducting fluctuation contribution to was found to vary slowly with the hole concentration (p) between and 0.197. For the OP and UD samples, is unusually large, being comparable with where S is the Seebeck coefficient and the Hall angle.
PACS: 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 74.72.Bk – Y-based cuprates / 72.15.Jf – Thermoelectric and thermomagnetic effects
© EPLA, 2009
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