Observation of a charge-neutral muon-polaron complex in antiferromagnetic Cr2O3

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dc.contributor.authorDehn, MHen_AU
dc.contributor.authorShenton, JKen_AU
dc.contributor.authorHolenstein, Sen_AU
dc.contributor.authorMeier, QNen_AU
dc.contributor.authorArseneau, DJen_AU
dc.contributor.authorCortie, DLen_AU
dc.contributor.authorHitti, Ben_AU
dc.contributor.authorFang, ACYen_AU
dc.contributor.authorMacFarlane, WAen_AU
dc.contributor.authorMcFadden, RMLen_AU
dc.contributor.authorMorris, GDen_AU
dc.contributor.authorSalman, Zen_AU
dc.contributor.authorLuetkens, Hen_AU
dc.contributor.authorSpaldin, NAen_AU
dc.contributor.authorFechner, Men_AU
dc.contributor.authorKiefl, RFen_AU
dc.date.accessioned2024-03-01T00:56:04Zen_AU
dc.date.available2024-03-01T00:56:04Zen_AU
dc.date.issued2019-11-26en_AU
dc.date.statistics2024-03-01en_AU
dc.description.abstractWe report a comprehensive muon spin rotation (μSR) study of the prototypical magnetoelectric antiferromagnet Cr2O3. We find the positively charged muon (μ+) occupies several distinct interstitial sites and displays a rich dynamic behavior involving local hopping, thermally activated site transitions, and the formation of a charge-neutral complex composed of a muon and an electron polaron. The discovery of such a complex has implications for the interpretation of μSR spectra in a wide range of magnetic oxides and opens a route to study the dopant characteristics of interstitial hydrogen impurities in such materials. We address implications arising from implanting a μ+ into a linear magnetoelectric and discuss the challenges of observing a local magnetoelectric effect generated by the charge of the muon. © Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.en_AU
dc.description.sponsorshipThis research was performed at the TRIUMF Centre for Materials and Molecular Science. The authors thank R. Abasalti and D. Vyas for excellent technical support. Initial spectra were taken at the Swiss Muon Source S μS at the Paul Scherrer Institute (PSI). We thank S. R. Dunsiger for critical reading of the manuscript and helpful discussions and G. Levy for help with crystal alignment. M. H. D. acknowledges support from a Stewart Blusson Quantum Matter Institute (SBQMI) QuEST Fellowship and would like to thank A. Nojeh and I. Elfimov for stimulating discussions. A Natural Sciences and Engineering Research Council (NSERC) Discovery grant to R. F. K. provided financial support. J. K. S. and N. A. S. acknowledge funding from the European Research Council under the European Union’s Horizon 2020 research and innovation program Grant Agreement No. 810451. Computational resources were provided by ETH Zürich and the Swiss National Supercomputing Centre, Project ID No. s889. S. H. acknowledges financial support by the Swiss National Science Foundation (SNF-Grant No. 200021-159736). Crystal structures were drawn using vesta [66].en_AU
dc.identifier.articlenumber011036en_AU
dc.identifier.citationDehn, M. H., Shenton, J. K., Holenstein, S., Meier, Q. N., Arseneau, D. J., Cortie, D. L., Hitti, B., Fang, A. C. Y., MacFarlane, W. A., McFadden, R. M. L., Morris, G. D., Salman, Z., Luetkens, H., Spaldin, N. A., Fechner, M., & Kiefl, R. F. (2020). Observation of a charge-neutral muon-polaron complex in antiferromagnetic Cr2O3. Physical Review X, 10(1), 011036. doi:10.1103/PhysRevX.10.011036en_AU
dc.identifier.issn2160-3308en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitlePhysical Review Xen_AU
dc.identifier.urihttp://dx.doi.org/10.1103/physrevx.10.011036en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15516en_AU
dc.identifier.volume10en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Society (APS)en_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectMuon spin relaxationen_AU
dc.subjectChromiumen_AU
dc.subjectOzoneen_AU
dc.subjectSpinen_AU
dc.subjectHydrogenen_AU
dc.subjectMaterialsen_AU
dc.titleObservation of a charge-neutral muon-polaron complex in antiferromagnetic Cr2O3en_AU
dc.typeJournal Articleen_AU
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