Anomalous Nernst effect in the vortex-liquid phase of high-temperature superconductors by layer decoupling
Abstract
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 (Tc0 - T)3 in the vicinity of the mean-field transition at Tc0. Quantitative agreement with recent experimental observations of a diamagnetic signal in the vortex-liquid phase of high-temperature superconductors is obtained.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- September 2006
- DOI:
- 10.1209/epl/i2006-10176-7
- arXiv:
- arXiv:cond-mat/0606107
- Bibcode:
- 2006EL.....75..804R
- Keywords:
-
- 74.25.Dw;
- 74.25.Ha;
- 74.25.Qt;
- Superconductivity phase diagrams;
- Magnetic properties;
- Vortex lattices flux pinning flux creep;
- Condensed Matter - Superconductivity;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 8 pages, 3 figures