A Unifi ed Geometric Rule for Designing Nanomagnetism in Graphene

查看全文 作　　者：Decai [1]Yu;Elizabeth [1]M.Lupton;[2]H.J.Gao;Chao [3]Zhang;Feng [1]Liu

机构地区：[1]Department of Materials Science and Engineering,University of Utah,Salt Lake City,UT 84112,USA;[2]Institute of Physics,Chinese Academy of Science,Beijing 100080,China;[3]School of Engineering Physics,University of Wollongong,NSW 2522,Australia

出　　处：《Nano Research》索引2008年第1卷第6期,共5页

基　　金：The work at Utah is supported by DOE;the work at IOP is supported by NSFC;the work at UoW is supported by the Australian Research Council(ARC)Discovery grant;Liu also acknowledges support by an ARC international professorial fellowship and Dr.X.L.Wang for helping to prepare the figures.First principles calculations were performed on computers at DOE-NERSC and CHPC of University of Utah. 摘　　要：Based on the underlying graphene lattice symmetry and an itinerant magnetism model on a bipartite lattice,we propose a unifi ed geometric rule for designing graphene-based magnetic nanostructures:spins are parallel(ferromagnetic(FM))on all zigzag edges which are at angles of 0°and 120°to each other,and antiparallel(antiferromagnetic(AF))at angles of 60°and 180°.The rule is found to be consistent with all the systems that have been studied so far.Applying the rule,we predict several novel graphene-based magnetic nanostructures:0-D FM nanodots with the highest possible magnetic moments,1-D FM nanoribbons,and 2-D magnetic superlattices. 关键词：NANOMAGNETISM graphene-based nanostructures magnetic ordering

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A Unifi ed Geometric Rule for Designing Nanomagnetism in Graphene

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