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Anomalous Valley Magnetic Moment of Graphene

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arxiv 1003.0111 v1 pith:3OIFE5Z6 submitted 2010-02-27 cond-mat.str-el cond-mat.other

Anomalous Valley Magnetic Moment of Graphene

Daqing Liu , Shengli Zhang , Erhu Zhang , Ning Ma , Huawei Chen This is my paper
classification cond-mat.str-el cond-mat.other
keywords grapheneinteractionscarriercarrierscontributionsfour-fermionmagneticmoment
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Carrier interactions on graphene are studied. The study shows that besides the well known Coulomb repulsion between carriers, there also exist four-fermion interactions associated with U-process, one of which attracts carriers in different valleys. We then calculate the contributions to valley magnetic moment from vertex correction and from four-fermion corrections explicitly. The relative contributions are -18% and 3% respectively. At last we point out that we can mimic heavy quarkonium system by carrier interactions in graphene.

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