Normal-state Nernst effect of a high-critical-temperature superconductor
S. Lambrecht, M. Ausloos
DOI 10.1103/PhysRevB.53.14047 · Physical Review B
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Abstract
We have analyzed the data of Clayhold et al. for the Nernst effect in the normal state of a high critical superconductor, i.e., Tl2Ba2CaCu2O8+δ. This requested to derive a kinetic expression for the Nernst effect, an expression able to take into account inelastic scattering and magnetic-field dependence. This was done along a relaxation time formalism for the solution of the Boltzmann equation but leaving a background term which can be calculated by the most appropriate method. The final calculation leads to the evaluation of the background term resulting from the thermoelectric field-free effect. In order to do this we have considered a model of Livanov and Sergeev. The Nernst effect is explained by a simple two band model for electrons and holes with different mobilities. The resulting fit to the experimental data looks rather convincing. Several predictions are made thereafter.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | Pressure not reported | onset |
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