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dc.contributor.authorKeens, R
dc.contributor.authorBedkihal, S
dc.contributor.authorKattnig, D
dc.date.accessioned2018-09-05T15:23:28Z
dc.date.issued2018-08-27
dc.description.abstractThe radical pair mechanism is a canonical model for the magnetosensitivity of chemical reaction processes. The key ingredient of this model is the hyperfine interaction that induces a coherent mixing of singlet and triplet electron spin states in pairs of radicals, thereby facilitating magnetic field effects (MFEs) on reaction yields through spin-selective reaction channels. We show that the hyperfine interaction is not a categorical requirement to realize the sensitivity of radical reactions to weak magnetic fields. We propose that, in systems comprising three instead of two radicals, dipolar interactions provide an alternative pathway for MFEs. By considering the role of symmetries and energy level crossings, we present a model that demonstrates a directional sensitivity to fields weaker than the geomagnetic field and remarkable spikes in the reaction yield as a function of the magnetic field intensity; these effects can moreover be tuned by the exchange interaction. Our results further the current understanding of the effects of weak magnetic fields on chemical reactions, could pave the way to a clearer understanding of the mysteries of magnetoreception and other biological MFEs and motivate the design of quantum sensors. Further still, this phenomenon will affect spin systems used in quantum information processing in the solid state and may also be applicable to spintronics.en_GB
dc.description.sponsorshipWe would like to thank The Royal Society (RG170378), the EPSRC (Grant No. EP/R021058/1) and NVIDIA (GPU Grant Program) for financial and in-kind support.en_GB
dc.identifier.citationVol. 121 (9), article 096001en_GB
dc.identifier.doi10.1103/PhysRevLett.121.096001
dc.identifier.urihttp://hdl.handle.net/10871/33924
dc.language.isoenen_GB
dc.publisherAmerican Physical Societyen_GB
dc.rights© 2018 American Physical Societyen_GB
dc.titleMagnetosensitivity in Dipolarly Coupled Three-Spin Systemsen_GB
dc.typeArticleen_GB
dc.date.available2018-09-05T15:23:28Z
dc.identifier.issn0031-9007
dc.descriptionThis is the author accepted manuscript. The final version is available from APS via the DOI in this recorden_GB
dc.identifier.journalPhysical Review Lettersen_GB
dcterms.dateAccepted2018-08-06
rioxxterms.versionAM
refterms.dateFCD2018-09-05T15:23:28Z
refterms.versionFCDAM


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