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dc.contributor.authorWatson, Matthew D.
dc.contributor.authorMarković, Igor
dc.contributor.authorMazzola, Federico
dc.contributor.authorRajan, Akhil
dc.contributor.authorMorales, Edgar A.
dc.contributor.authorBurn, David M.
dc.contributor.authorHesjedal, Thorsten
dc.contributor.authorvan der Laan, Gerrit
dc.contributor.authorMukherjee, Saumya
dc.contributor.authorKim, Timur K.
dc.contributor.authorBigi, Chiara
dc.contributor.authorVobornik, Ivana
dc.contributor.authorHatnean, Monica Ciomaga
dc.contributor.authorBalakrishnan, Geetha
dc.contributor.authorKing, Philip D. C.
dc.identifier.citationWatson , M D , Marković , I , Mazzola , F , Rajan , A , Morales , E A , Burn , D M , Hesjedal , T , van der Laan , G , Mukherjee , S , Kim , T K , Bigi , C , Vobornik , I , Hatnean , M C , Balakrishnan , G & King , P D C 2020 , ' Direct observation of the energy gain underpinning ferromagnetic superexchange in the electronic structure of CrGeTe 3 ' , Physical Review. B, Condensed matter and materials physics , vol. 101 , 205125 .en
dc.identifier.otherORCID: /0000-0002-0737-2814/work/74873146
dc.identifier.otherORCID: /0000-0001-5356-3032/work/74873148
dc.descriptionFunding: The Leverhulme Trust (Grant No. RL-2016-006), The Royal Society, and the European Research Council (Grant No. ERC-714193-QUESTDO). Max Planck Research School for Chemistry and Physics of Quantum Materials (IMPRS-CPQM) (I.M. and E.A.M).en
dc.description.abstractWe investigate the temperature-dependent electronic structure of the van der Waals ferromagnet, CrGeTe3. Using angle-resolved photoemission spectroscopy, we identify atomic- and orbital-specific band shifts upon cooling through TC. From these, together with x-ray absorption spectroscopy and x-ray magnetic circular dichroism measurements, we identify the states created by a covalent bond between the Te 5p and the Cr eg orbitals as the primary driver of the ferromagnetic ordering in this system, while it is the Cr t2g states that carry the majority of the spin moment. The t2g states furthermore exhibit a marked bandwidth increase and a remarkable lifetime enhancement upon entering the ordered phase, pointing to a delicate interplay between localized and itinerant states in this family of layered ferromagnets.
dc.relation.ispartofPhysical Review. B, Condensed matter and materials physicsen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleDirect observation of the energy gain underpinning ferromagnetic superexchange in the electronic structure of CrGeTe3en
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorThe Royal Societyen
dc.contributor.sponsorEuropean Research Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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