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dc.contributor.authorBayliss, SLen
dc.contributor.authorWeiss, Leahen
dc.contributor.authorMitioglu, Aen
dc.contributor.authorGalkowski, Ken
dc.contributor.authorYang, Zen
dc.contributor.authorYunusova, Ken
dc.contributor.authorSurrente, Aen
dc.contributor.authorThorley, KJen
dc.contributor.authorBehrends, Jen
dc.contributor.authorBittl, Ren
dc.contributor.authorAnthony, JEen
dc.contributor.authorRao, Akshayen
dc.contributor.authorFriend, Richarden
dc.contributor.authorPlochocka, Pen
dc.contributor.authorChristianen, PCMen
dc.contributor.authorGreenham, Neilen
dc.contributor.authorChepelianskii, ADen
dc.date.accessioned2018-07-19T10:29:22Z
dc.date.available2018-07-19T10:29:22Z
dc.date.issued2018-05-02en
dc.identifier.issn0027-8424
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/278248
dc.description.abstractFrom organic electronics to biological systems, understanding the role of intermolecular interactions between spin pairs is a key challenge. Here we show how such pairs can be selectively addressed with combined spin and optical sensitivity. We demonstrate this for bound pairs of spin-triplet excitations formed by singlet fission, with direct applicability across a wide range of synthetic and biological systems. We show that the site-sensitivity of exchange coupling allows distinct triplet pairs to be resonantly addressed at different magnetic fields, tuning them between optically bright singlet (S = 0) and dark triplet, quintet (S = 1, 2) configurations: this induces narrow holes in a broad optical emission spectrum, uncovering exchange-specific luminescence. Using fields up to 60 T, we identify three distinct triplet-pair sites, with exchange couplings varying over an order of magnitude (0.3-5 meV), each with its own luminescence spectrum, coexisting in a single material. Our results reveal how site-selectivity can be achieved for organic spin pairs in a broad range of systems.
dc.description.sponsorshipThis work was supported by HFMLRU/ FOM and LNCMI-CNRS, members of the European Magnetic Field Laboratory (EMFL) and by EPSRC (UK) via its membership to the EMFL (grant no. EP/N01085X/1 and NS/A000060/1) and through grant no. EP/M005143/1. L.R.W. acknowledges support of the Gates-Cambridge and Winton Scholarships. We acknowledge support from Labex ANR-10-LABX-0039-PALM, ANR SPINEX, and DFG SPP-1601 (Bi-464/10-2).
dc.format.mediumPrint-Electronicen
dc.languageengen
dc.publisherNational Academy of Sciences
dc.titleSite-selective measurement of coupled spin pairs in an organic semiconductor.en
dc.typeArticle
prism.endingPage5082
prism.issueIdentifier20en
prism.publicationDate2018en
prism.publicationNameProceedings of the National Academy of Sciences of the United States of Americaen
prism.startingPage5077
prism.volume115en
dc.identifier.doi10.17863/CAM.25592
dcterms.dateAccepted2018-04-12en
rioxxterms.versionofrecord10.1073/pnas.1718868115en
rioxxterms.versionAM*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-05-02en
dc.contributor.orcidWeiss, Leah [0000-0003-0872-708X]
dc.contributor.orcidMitioglu, A [0000-0002-1089-762X]
dc.contributor.orcidGalkowski, K [0000-0002-9275-1519]
dc.contributor.orcidSurrente, A [0000-0003-4078-4965]
dc.contributor.orcidRao, Akshay [0000-0003-4261-0766]
dc.contributor.orcidFriend, Richard [0000-0001-6565-6308]
dc.contributor.orcidGreenham, Neil [0000-0002-2155-2432]
dc.identifier.eissn1091-6490
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/M005143/1)
pubs.funder-project-idEPSRC (EP/M006360/1)
rioxxterms.freetoread.startdate2018-11-02


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