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dc.contributor.authorYoo, H. M.
dc.contributor.authorBaldwin, K. W.
dc.contributor.authorWest, K.
dc.contributor.authorPfeiffer, L.
dc.contributor.authorAshoori, Raymond
dc.date.accessioned2021-02-03T18:51:47Z
dc.date.available2021-02-03T18:51:47Z
dc.date.issued2020-06
dc.date.submitted2019-12
dc.identifier.issn1745-2481
dc.identifier.urihttps://hdl.handle.net/1721.1/129649
dc.description.abstractMeasurement of the ground-state spin polarization of quantum systems offers great potential for the discovery and characterization of correlated electronic states. However, spin polarization measurements have mainly involved optical1–3 and NMR4,5 techniques that perturb the delicate ground states and, for quantum Hall systems, have provided conflicting results1,4,6. Here we present spin-resolved pulsed tunnelling (SRPT) that precisely determines the phase diagram of the ground-state spin polarization as a function of magnetic field and Landau level (LL) filling factor (ν) with negligible perturbation to the system. Our phase diagram shows a variety of polarized, unpolarized and topological spin states in the lowest (N = 0) LL, which can largely be described by a weakly interacting composite fermion (CF) model7. However, the phase diagram shows unexpected behaviour in the N = 1 LL. We observe fully polarized ν = 5/2 and 8/3 states but a partially depolarized ν = 7/3 state. This behaviour deviates from the conventional theoretical picture7,8 of weakly interacting fractional quasiparticles, but instead suggests unusual electronic correlations and the possibility of new non-Abelian phases9–11. The results establish SRPT as a powerful technique for investigating correlated electron phenomena. ©2020, The Author(s), under exclusive licence to Springer Nature Limited.en_US
dc.description.sponsorshipBasic Energy Sciences Program of the Office of Science of the US DOE (FG02-08ER46514)en_US
dc.description.sponsorshipGordon and Betty Moore Foundation (GBMF2931)en_US
dc.description.sponsorshipGordon and Betty Moore Foundation through the EPiQS initiative (GBMF4420)en_US
dc.description.sponsorshipNSF MRSEC (DMR-1420541)en_US
dc.language.isoen
dc.publisherSpringer Science and Business Media LLCen_US
dc.relation.isversionofhttps://dx.doi.org/10.1038/s41567-020-0946-1en_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.sourcearXiven_US
dc.titleComplete spin phase diagram of the fractional quantum Hall liquiden_US
dc.title.alternativeSpin phase diagram of the interacting quantum Hall liquiden_US
dc.typeArticleen_US
dc.identifier.citationYoo, H. M. et al., "Spin phase diagram of the interacting quantum Hall liquid." Nature Physics 16, 10 (October 2020): 1022–27 ©2020 Authorsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.relation.journalNature Physicsen_US
dc.eprint.versionOriginal manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/NonPeerRevieweden_US
dc.date.updated2020-09-02T11:49:23Z
dspace.date.submission2020-09-02T11:49:25Z
mit.journal.volume16en_US
mit.journal.issue10en_US
mit.licensePUBLISHER_POLICY


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