Volume 75, Number 5, September 2006
|Page(s)||804 - 810|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||02 August 2006|
Anomalous Nernst effect in the vortex-liquid phase of high-temperature superconductors by layer decoupling
Department of Physics and Astronomy, California State University Los Angeles, CA 90032, USA
Accepted: 13 July 2007
Linear diamagnetism is predicted in the vortex-liquid phase of layered superconductors at temperatures just below the mean-field phase transition on the basis of a high-temperature analysis of the corresponding frustrated XY model. The diamagnetic susceptibility, and the Nernst signal by implication, is found to vanish with temperature as in the vicinity of the mean-field transition at . Quantitative agreement with recent experimental observations of a diamagnetic signal in the vortex-liquid phase of high-temperature superconductors is obtained.
PACS: 74.25.Dw – Superconductivity phase diagrams / 74.25.Ha – Magnetic properties / 74.25.Qt – Vortex lattices, flux pinning, flux creep
© EDP Sciences, 2006
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