Anomalous Valley Magnetic Moment of Graphene

Details Anomalous Valley Magnetic Moment of Graphene Anomalous Valley Magnetic Moment of Graphene

2010-02-27

arxiv.org/abs/1003.0111v1

Europhys.Lett.89:37002,2010

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 2 figures

Scientific paper

10.1209/0295-5075/89/37002

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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