Band-dependent normal-state coherence in Sr$_{2}$RuO$_{4}$: Evidence from Nernst effect and thermopower measurements

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dc.creatorXu, X. F.
dc.creatorXu, Z. A.
dc.creatorLiu, T. J.
dc.creatorFobes, D.
dc.creatorMao, Z. Q.
dc.creatorLuo, J. L.
dc.creatorLiu, Y.
dc.date2008-01-22
dc.date2008-07-05
dc.date.accessioned2026-07-07T09:53:37Z
dc.date.available2026-07-07T09:53:37Z
dc.descriptionWe present the first measurement on Nernst effect in the normal state of odd-parity, spin-triplet superconductor Sr$_{2}$RuO$_{4}$. Below 100 K, the Nernst signal was found to be negative, large, and, as a function of magnetic field, nonlinear. Its magnitude increases with the decreasing temperature until reaching a maximum around $T^*$ $\approx$ 20 - 25 K, below which it starts to decrease linearly as a function of temperature. The large value of the Nernst signal appears to be related to the multiband nature of the normal state and the nonlinearity to band-dependent magnetic fluctuation in Sr$_{2}$RuO$_{4}$. We argue that the sharp decrease in Nernst signal below $T^*$ is due to the suppression of quasiparticle scattering and the emergence of band-dependent coherence in the normal state. The observation of a sharp kink in the temperature dependent thermopower around $T^*$ and a sharp drop of Hall angle at low temperatures provide additional support to this picture.
dc.description4 pages, 4 figures; added figures, revised content; accepted by PRL
dc.identifierhttps://arxiv.org/abs/0801.3371
dc.identifierhttp://arxiv.org/abs/0801.3371
dc.identifierPhys. Rev. Lett. 101, 057002 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.057002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/166019
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleBand-dependent normal-state coherence in Sr$_{2}$RuO$_{4}$: Evidence from Nernst effect and thermopower measurements
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