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Numerical simulation of the Nernst effect in extreme type-II superconductors: A negative Nernst signal and its noise power spectra
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 86, no 13, 134525- p.Article in journal (Refereed) Published
Abstract [en]

Recently, different transport coefficients have been measured in high-T-c 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 alpha(xy) at temperatures close to the mean-field transition temperature T-c(MF) (H), which qualitatively agrees with recent experiments on high-T-c materials. We also discuss the noise power spectrum of alpha(xy), which shows 1/f(beta) 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.

Place, publisher, year, edition, pages
2012. Vol. 86, no 13, 134525- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-83788DOI: 10.1103/PhysRevB.86.134525ISI: 000310129000009OAI: oai:DiVA.org:su-83788DiVA: diva2:578555
Note

AuthorCount:3;

Available from: 2012-12-18 Created: 2012-12-14 Last updated: 2017-12-06Bibliographically approved

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