Numerical simulation of the Nernst effect in extreme type-II superconductors: A negative Nernst signal and its noise power spectra
Sangwoo S. Chung, Paata Kakashvili, C. J. Bolech
DOI 10.1103/PhysRevB.86.134525 · Physical Review B
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Abstract
Recently, different transport coefficients have been measured in high-Tc superconductors to pinpoint the nature of the pseudogap phase. In particular, the thermoelectric coefficients received considerable attention both theoretically and experimentally. We numerically simulate the Nernst effect in extreme type-II superconductors using the time-dependent Ginzburg-Landau equations. We report the sign reversal of the thermoelectric coefficient αxy at temperatures close to the mean-field transition temperature TcMF(H), which qualitatively agrees with recent experiments on high-Tc materials. We also discuss the noise power spectrum of αxy, which shows 1/fβ behavior. Based on this observation, we propose an experiment to distinguish among different regimes of vortex dynamics by measuring the noise correlations of the Nernst signal.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBCO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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