Thermopower and Nernst measurements in a half-filled lowest Landau level

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dc.citation.articleNumber245425en_US
dc.citation.issueNumber24en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber97en_US
dc.contributor.authorLiu, Xiaoxueen_US
dc.contributor.authorLi, Tingxinen_US
dc.contributor.authorZhang, Poen_US
dc.contributor.authorPfeiffer, L.N.en_US
dc.contributor.authorWest, K.W.en_US
dc.contributor.authorZhang, Chien_US
dc.contributor.authorDu, Rui-Ruien_US
dc.date.accessioned2018-11-01T14:28:10Zen_US
dc.date.available2018-11-01T14:28:10Zen_US
dc.date.issued2018en_US
dc.description.abstractMotivated by the recent proposal by Potter et al. [Phys. Rev. X 6, 031026 (2016)] concerning possible thermoelectric signatures of Dirac composite fermions, we perform a systematic experimental study of thermoelectric transport of an ultrahigh-mobility GaAs/AlxGa1−xAs two-dimensional electron system at filling factor v=1/2. We demonstrate that the thermopower Sxx and Nernst Sxy are symmetric and antisymmetric with respect to B=0 T, respectively. The measured properties of thermopower Sxx at v=1/2 are consistent with previous experimental results. The Nernst signals Sxy of v=1/2, which have not been reported previously, are nonzero and show a power-law relation with temperature in the phonon-drag dominant region. In the electron-diffusion dominant region, the Nernst signals Sxy of v=1/2 are found to be significantly smaller than the linear temperature dependent values predicted by Potter et al., and decreasing with temperature faster than linear dependence.en_US
dc.identifier.citationLiu, Xiaoxue, Li, Tingxin, Zhang, Po, et al.. "Thermopower and Nernst measurements in a half-filled lowest Landau level." <i>Physical Review B,</i> 97, no. 24 (2018) American Physical Society: https://doi.org/10.1103/PhysRevB.97.245425.en_US
dc.identifier.digitalPhysRevB.97.245425en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.97.245425en_US
dc.identifier.urihttps://hdl.handle.net/1911/103265en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleThermopower and Nernst measurements in a half-filled lowest Landau levelen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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