000829697 001__ 829697 000829697 005__ 20230426083146.0 000829697 0247_ $$2doi$$a10.1103/PhysRevB.93.224428 000829697 0247_ $$2ISSN$$a0163-1829 000829697 0247_ $$2ISSN$$a0556-2805 000829697 0247_ $$2ISSN$$a1094-1622 000829697 0247_ $$2ISSN$$a1095-3795 000829697 0247_ $$2ISSN$$a1098-0121 000829697 0247_ $$2ISSN$$a1550-235X 000829697 0247_ $$2ISSN$$a2469-9950 000829697 0247_ $$2ISSN$$a2469-9969 000829697 0247_ $$2Handle$$a2128/14318 000829697 0247_ $$2WOS$$aWOS:000378811500006 000829697 037__ $$aFZJ-2017-03341 000829697 082__ $$a530 000829697 1001_ $$0P:(DE-HGF)0$$aPeters, L.$$b0$$eCorresponding author 000829697 245__ $$aCorrelation effects and orbital magnetism of Co clusters 000829697 260__ $$aWoodbury, NY$$bInst.$$c2016 000829697 3367_ $$2DRIVER$$aarticle 000829697 3367_ $$2DataCite$$aOutput Types/Journal article 000829697 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1493802964_27256 000829697 3367_ $$2BibTeX$$aARTICLE 000829697 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000829697 3367_ $$00$$2EndNote$$aJournal Article 000829697 520__ $$aRecent experiments on isolated Co clusters have shown huge orbital magnetic moments in comparison with their bulk and surface counterparts. These clusters hence provide the unique possibility to study the evolution of the orbital magnetic moment with respect to the cluster size and how competing interactions contribute to the quenching of orbital magnetism. We investigate here different theoretical methods to calculate the spin and orbital moments of Co clusters, and assess the performances of the methods in comparison with experiments. It is shown that density-functional theory in conventional local density or generalized gradient approximations, or even with a hybrid functional, severely underestimates the orbital moment. As natural extensions/corrections, we considered the orbital polarization correction, the LDA+U approximation as well as the LDA+DMFT method. Our theory shows that of the considered methods, only the LDA+DMFT method provides orbital moments in agreement with experiment, thus emphasizing the importance of dynamic correlations effects for determining fundamental magnetic properties of magnets in the nanosize regime. 000829697 536__ $$0G:(DE-HGF)POF3-142$$a142 - Controlling Spin-Based Phenomena (POF3-142)$$cPOF3-142$$fPOF III$$x0 000829697 536__ $$0G:(DE-HGF)POF3-143$$a143 - Controlling Configuration-Based Phenomena (POF3-143)$$cPOF3-143$$fPOF III$$x1 000829697 542__ $$2Crossref$$i2016-06-27$$uhttp://link.aps.org/licenses/aps-default-license 000829697 588__ $$aDataset connected to CrossRef 000829697 7001_ $$0P:(DE-HGF)0$$aDi Marco, I.$$b1 000829697 7001_ $$0P:(DE-HGF)0$$aGrånäs, O.$$b2 000829697 7001_ $$0P:(DE-Juel1)130937$$aŞaşıoğlu, E.$$b3 000829697 7001_ $$0P:(DE-HGF)0$$aAltun, A.$$b4 000829697 7001_ $$0P:(DE-Juel1)144093$$aRossen, S.$$b5$$ufzj 000829697 7001_ $$0P:(DE-Juel1)130644$$aFriedrich, Christoph$$b6$$ufzj 000829697 7001_ $$0P:(DE-Juel1)130548$$aBlügel, S.$$b7$$ufzj 000829697 7001_ $$0P:(DE-HGF)0$$aKatsnelson, M. 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